U0073 code

Labor: 1.0. The cost to diagnose the U0073 Pontiac code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

2007 Tahoe Misfire Losing Communication P0300-00, P0575-00, U0073-00, U0100-00, C0561-71 Good evening guys, 2007 Tahoe, 5.3, ~200k I am getting P0300-00, P0575-00, U0073-00, U0100-00, C0561-71. Symptoms are strange. ... 2008 F350 U0073 and U0100 codes I have a 2008 F350 6.4. If I have a tuner plugged in I get sporadic U0073 and U0100 codes ...U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Malibu as it would any other. This code appears when something has interrupted the communication between two of your Malibu's control modules. The most common causes of U0073 areA U0073 code indicates that communication between your car’s modules has been lost. There are numerous module devices located throughout your vehicle. These modules communicate with the PCM about the performance of your car via the CAN bus. The PCM then makes use of this data to make adjustments to your car engine’s fuel consumption.Who writes and enforces the U.S. tax code? Read about who writes and enforces the tax laws in the United States. Advertisement If you think that tax forms are unnecessarily complic...U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Ford F150 as it would any other. This code appears when something has interrupted the communication between two of your F150's control modules. The most common causes of U0073 areCommon Causes of GMC code U0073. Several factors can lead to the GMC code U0073, including faulty wiring or connectors, damaged or corroded terminals, issues with the powertrain control module (PCM), or a malfunctioning control module. Electrical interference or a weak battery can also trigger this code. Symptoms of GMC code U0073What Does the U0073 Chevrolet Code Mean? Modules connected to the high-speed General Motor Local Area Network (GMLAN) serial data circuits monitor for serial data communications during normal vehicle operation. Operating information and commands are exchanged among the modules.

CEL and U0073 code. Driving home today the Check Engine light and Vehicle Dynamics Control warning light came on. The Cruise control indicator light also started intermittently flashing on and off. I scanned the OBDII codes with Android Torque when I made it home and it has a U0073 fault. It seems to be running fine.Using my code reader it got a reading of U0073. Looked up the code and decided to take it to the dealer since the car is still under warranty. The dealer could find nothing wrong with the car so the code was just erased. The car continues to have intermitten hesitation problems when accelerating very slowly.U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Cadillac XLR as it would any other. This code appears when something has interrupted the communication between two of your XLR's control modules. The most common causes of U0073 areCode P2440 on a Toyota Tundra refers to the Secondary Air Injection System Switching Valve Stuck Open Bank 1. This code indicates that there is an issue with the secondary air injection system in the Tundra’s engine. The secondary air injection system helps reduce emissions during cold starts by injecting air into the exhaust system.The repair cost of a U0073 code varies, depending on the make and model of the vehicle. Costs may range from around $100 to more than $1,000. In uncommon cases, two or more modules may need to be replaced. Conclusion. In conclusion, the U0073 code is an OBD-II trouble code. It's a major DTC that requires extensive diagnostics to identify the ...Jun 2, 2021 · U0073 Definition: Control Module Communication Bus”A” Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Toyota Camry as it would any other. This code appears when something has interrupted the communication between two of your Camry’s control modules. The most common causes of U0073 are wiring ... Code U0101 stands for Lost Communication with TCM. The transmission control module (TCM) is the computer that controls your vehicle's transmission. Various sensors provide input to the TCM. It then uses this information to determine control of various outputs, such as the shift solenoids and torque converter clutch solenoid.A U0073 engine code indicates there is a problem with the CAN bus unit. The 'A' circuit is one of two wires that gathers information from the car's modules. If your car records a U0073 engine code, it may be caused by the following problems: The 'A' circuit may be disconnected or shorted. Other wiring or connection problems with CAN bus.

Brake very gently to a complete stop, allow at least six (6) seconds. c. Repeat steps (a-b) five (5) times in the dealership parking lot or similar setting. d. Accelerate from rest with light throttle ensuring that the 1-2, 2-3 and 3-4 shifts occur at …In other words, assuming the app (ActiveOBD, Torque, etc) sends 08AA instead of 08BB - that would NOT provoke U0073, only the software handling i.e. OBD/CAN-bus response without toggling the code. They provide a 90-day money back or replace - it really worth to utilize it in this case. U0073 is NOT normal. Like.code U0073 and CEL. I have been reading on here for a while now and we bought a 2011 outback 2.5i premium 12-23-10. We had the dealer install an OEM remote start a few days later. It is now 01-18-11 and the vehicle has been in the shop three times. The first time it flashed the brake light, the traction control and check engine light came …i have a 2007 silverado with a code u0073 what to do next…. Experience: ASE Master Technician, L1, Master GM Technician. Over 20 years of bumper to bumper GM experience. There is a bulletin that talks about this code, what it means, and how to diagnose/correct it. This can be really tough to pin down, especially if your problem is ...

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U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Subaru Outback as it would any other. This code appears when something has interrupted the communication between two of your Outback's control modules. The most common causes of U0073 areLabor: 1.0. To diagnose the U0073 Lexus code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour.U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Toyota Rav4 as it would any other. This code appears when something has interrupted the communication between two of your Rav4's control modules. The most common causes of U0073 areU0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Equinox as it would any other. This code appears when something has interrupted the communication between two of your Equinox’s control modules. The most common causes of U0073 are wiring problems (think open or short circuit).U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Cadillac STS as it would any other. This code appears when something has interrupted the communication between two of your STS's control modules. The most common causes of U0073 are

1. The list of automotive Makes at the right edge of the screen. The currently selected ODB-ii codes is for the Toyota makes. 2. Look up the other OBD II Trouble Codes, please use the search box. Enter the 5 character trouble codes in the search box and submit the search. 3.The U0073 Code is typically caused by an issue with your vehicle’s communication bus.You will want to investigate the cause of the problem and resolve it in order to prevent any further issues from happening. A code is a set of instructions that can be used to create or run software.2007 with 6L80 and 6.2L code U0073-00 check engine and stabiltrak light Hoping to find a quick solution to a ongoing problem. My 2007 Escalade has been a challenge this year. It dropped a valve seat, broke a piston and ruined a cylinder head. Got all that fixed. It was running amazingly well. I...The infamous U0101 Code. Jump to Latest Follow 10K views 1 reply 2 participants last post by Hook'em_Horns! Feb 25, 2018. C. Cowboybarta Discussion starter 2 posts · Joined 2017 Add to quote; Only show this user #1 · Feb 25, 2018. Hey all. Got to the house, turned truck off. ...Common Causes of GMC code U0073. Several factors can lead to the GMC code U0073, including faulty wiring or connectors, damaged or corroded terminals, issues with the powertrain control module (PCM), or a malfunctioning control module. Electrical interference or a weak battery can also trigger this code. Symptoms of GMC code U00735644477 5431207. Page 4 December, 2020 Bulletin No.: 20-NA-212. Important:Techline Connect and TIS2WEB screens shown above. Important:If the Same Calibration/Software Warning is noted on the TLC or SPS Summary screen, select OK and follow on-screen instructions. The system will generate a warranty claim code (WCC) for documentation purposes only.U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Ford F250 as it would any other. This code appears when something has interrupted the communication between two of your F250's control modules. The most common causes of U0073 areU0073 Definition: Control Module Communication Bus”A” Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Impala as it would any other. This code appears when something has interrupted the communication between two of your Impala’s control modules. The most common causes of U0073 are wiring ...Hey guys. Odd thing happening. I was testing out my new code reader. Well, I had a code U0073 Control Module Communication Bus A off. Weird thing is, no check engine light, and if I erase the codes it's immediately there again. Tried my friend's code reader and same thing, so it's not my reader specifically. Any idea what's going on?

U0073: A faulty control module, A problem with the CAN bus: U0100: A faulty PCM, A problem with the control module circuit, A problem with the CAN bus: U0107: ... Codes starting with "P1" are Subaru-specific, and should also be diagnosed by one of our certified Subaru specialists. Our team has access to the latest and most advanced Subaru ...

U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Suburban as it would any other. This code appears when something has interrupted the communication between two of your Suburban's control modules. The most common causes of U0073 areFeb 2, 2019 ... Having issues with my truck, no engine light just have a DTC U0073 which is something like communication bus A off.. ive also had other ...Code Tech Notes. If the Diagnostic Trouble Codes (DTC) P2635, U0074, and/or U18A2 are set, it may be found that the actual fuel pressure (low-pressure system) will be reading substantially higher than desired fuel pressure, in this case, the cause of the problem is a loss of communication between Engine Control Module (ECM) and Fuel Pump ...Dynaboard built a low-code web application development tool to bring together product managers, designers and developers in a single tool. Dynaboard founder Alex Kern has been prog...PIT4730B Diagnostic Tip- Information for U0140 or U0073 (BCM Appears Off Line On The High Speed Buss) Models Brand: Model: Model Years: VIN: Engine: Transmissions: from to Buick Enclave 2008 - 2017 All All All All Buick Lucerne 2006 - 2011 All All All All Cadillac DTS 2006 - 2012 All All All All Cadillac Escalade 2007 - 2014 All All All AllU0073, U0077, U0078, U0100, U0101, U0102, U0121, U0126, U0131, U0140, U0155, U0164, U0415, U0422, U0428, U0452, U1509, U150F and/or U15E1 Note: The following causes listed below, may cause the battery to discharge. Cause 1 This condition may be caused by battery cables with high resistance and/or loose connections at the:U0073 Definition: Control Module Communication Bus”A” Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Ford Escape as it would any other. This code appears when something has interrupted the communication between two of your Escape’s control modules. The most common causes of U0073 are wiring ...

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CEL and U0073 code. Driving home today the Check Engine light and Vehicle Dynamics Control warning light came on. The Cruise control indicator light also started intermittently flashing on and off. I scanned the OBDII codes with Android Torque when I made it home and it has a U0073 fault. It seems to be running fine.U0073 should have a symptom code as well, either 71 for ECU High Speed Bus Off, 72 for ECU Low Speed Bus Off or 00 Control Module Communication Bus Off. This is a wiring issue or module/computer failure. The colored and interactive diagrams at AllDataDIY may prove useful for this one.The code U0074: Control Module Communication Bus 'B' Off points out a fault in the communication bus 'B' of control modules in your vehicle. While it's not an ... U0073, U0074, U0125-72, U0125-74, U0126-72. Suggestions to Fix Issue: Check for wire breaks in the wiring harness, particularly at X411.C6 Corvette ZR1 & Z06 - Had a U0073 code. need info - Last week when I started the car I had a dozen messages, Service traction control, service active handling, service fuel system, service alarm system, etc, Three gauges weren't working - fuel, engine temp and oil pressure. Voltmeter, tach and speedo were working....U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Saturn Aura as it would any other. This code appears when something has interrupted the communication between two of your Aura's control modules. The most common causes of U0073 areBrake very gently to a complete stop, allow at least six (6) seconds. c. Repeat steps (a-b) five (5) times in the dealership parking lot or similar setting. d. Accelerate from rest with light throttle ensuring that the 1-2, 2-3 and 3-4 shifts occur at engine speeds between 1700-2000 RPM.U0073 Controller Area Network (CAN) Bus communication Disconnection the battery will reset the monitors and would reset the CK ENG LT. that is depending on the other code that is stored. When U0073 code is set it is capable of suspending other code from occuring, it is imporatnt to know what the other code that are also set with this code.Brake very gently to a complete stop, allow at least six (6) seconds. c. Repeat steps (a-b) five (5) times in the dealership parking lot or similar setting. d. Accelerate from rest with light throttle ensuring that the 1-2, 2-3 and 3-4 shifts occur at engine speeds between 1700-2000 RPM.PIT4730B Diagnostic Tip- Information for U0140 or U0073 (BCM Appears Off Line On The High Speed Buss) Models Brand: Model: Model Years: VIN: Engine: Transmissions: from to Buick Enclave 2008 - 2017 All All All All Buick Lucerne 2006 - 2011 All All All All Cadillac DTS 2006 - 2012 All All All All Cadillac Escalade 2007 - 2014 All All All AllEvery time I plug in my mini maxx, it powers on, then just says "establishing communication" and throws the U0073 It only happens with my mini maxx. It used to happen every once in a while. Now it happens everytime. My OBD2 code reader and my sct livewire both work great with it. I use them to clear the code and go on my way.The video focuses on the basic Toyota specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight into p... ….

U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Camaro as it would any other. This code appears when something has interrupted the communication between two of your Camaro's control modules. The most common causes of U0073 areU0073 - Definition: Control Module Communication Bus "A" Off. U0140 - Definition: Lost Communication With Body Control Module. What needs to happen is the cluster can be commanded to sweep gages using the GM Tech 2 scan tool. Keep in mind that the gage testing and any programming needs to be done at a GM dealer using the GM Tech 2 scan tool.Apr 28, 2021. #18. Well,,, I was using my trusty old Autel to read the codes, all it showed was the U0073, switched to the EFILive box and it shows some TCM codes, may be why I am bumping my head here, the Autel showed TCM codes before when I had a bad return in the harness for the temp and Mode sensor so I am baffled as to why all of a sudden ...U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Opel Corsa as it would any other. This code appears when something has interrupted the communication between two of your Corsa's control modules. The most common causes of U0073 areNov 27, 2017 ... (But the codes are still there internally as read from my code reader) I've searched the forum and didn't see anyone else who had these two ...U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Malibu as it would any other. This code appears when something has interrupted the communication between two of your Malibu's control modules. The most common causes of U0073 areU0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Subaru Liberty as it would any other. This code appears when something has interrupted the communication between two of your Liberty's control modules. The most common causes of U0073 areThe video focuses on the basic Pontiac specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight into ...U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Cadillac XTS as it would any other. This code appears when something has interrupted the communication between two of your XTS's control modules. The most common causes of U0073 areThe supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. The Diagnostic Trouble Code (DTC) will be set when the device setting the DTC has attempted to establish communications on the serial data circuits more than 3 times in 5 s. U0073 Cadillac Code - Control Module Communication Bus ... U0073 code, O custo para corrigir esse código de erro do motor pode variar de acordo com a causa real, a marca e o modelo do seu carro, o local e a oficina onde você consertou esse código de erro. O passo inicial é diagnosticar o problema, que custa entre US$ 75 e US$ 150. No entanto, o custo para corrigir o código U0073 pode variar entre US$ 200 e US ..., Jun 2, 2021 · U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your GMC Yukon as it would any other. This code appears when something has interrupted the communication between two of your Yukon's control modules. The most common causes of U0073 are , Code U0121 stands for Lost Communication with Anti-lock Brake System Module. Anti-lock brakes are required on all modern vehicles. The antilock braking system (ABS) prevents wheel lockup by modulating the brakes in an emergency situation. Basically, the ABS system does what the driver used to do in the old days - pump the brakes during a panic ..., U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Audi A3 as it would any other. This code appears when something has interrupted the communication between two of your A3's control modules. The most common causes of U0073 are, U0073 Definition: Control Module Communication Bus"A" Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Lexus IS 300 as it would any other. This code appears when something has interrupted the communication between two of your IS 300's control modules. The most common causes of U0073 are wiring ..., 1 post · Joined 2014. #1 · Nov 19, 2018. I am having trouble with my 2015 Forester (~61K miles). Check engine lights came on out of nowhere one morning. According to my Automatic Pro dongle, it is telling me these check engine light codes: U0122. U0100. U0155. We have had a battery replaced recently from AAA after getting the same codes & car ..., Allison 1000 & 2000 Gen 4 Fault Codes: U0073 CAN Bus Reset Counter Overrun. CIRCUIT DESCRIPTION: J1939 is the protocol currently used in medium duty applications to allow communication between an electronically-controlled engine and the OEM transmission. A signal is sent over a two-wire network harness that incorporates two 120 Ohm resistors in ..., That will help to narrow down whether it is the Module itself or the Wire Harness. I'm going to attach the testing for all three DTC's. Attached here is U0073. Ask Your Own Chevy Question. I have codes u0073 u0100 u0101 and p0700. Chevy Mechanic: DanielP121. Here is the U0100 / U0101., U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Trailblazer as it would any other. This code appears when something has interrupted the communication between two of your Trailblazer's control modules. The most common causes of U0073 are, U0100 - Lost communication with Engine Control Module (ECM) P0575 - Cruise Control switch signal message counter incorrect. P0700 - Transmission Control Module (TCM) Requested MIL illumination (Malfunction Indicator Lamp) U0073 - Control Module Communication Bus A Off., Oct 11, 2023 · How to fix a U0073 Code: Control Module Communication Bus "A" Off The U0073 means control modules and CAN Bus are not communicating correctly.The CAN (Contr... , Code U0073 stands for Control Module Communication Bus 'A' Off. The computers in modern vehicles (referred to as modules) communicate with one another over a data bus. This bus is called the controller area network (CAN). CAN is a two-wire bus, consisting of CAN High and CAN low. CAN High has a communication rate, or baud rate, of 500k bits/second. , U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Toyota Corolla as it would any other. This code appears when something has interrupted the communication between two of your Corolla's control modules. The most common causes of U0073 are, U0073 should have a symptom code as well, either 71 for ECU High Speed Bus Off, 72 for ECU Low Speed Bus Off or 00 Control Module Communication Bus Off. This is a wiring issue or module/computer failure. The colored and interactive diagrams at AllDataDIY may prove useful for this one., Elon Musk suggested during a Twitter Spaces with Ford CEO Jim Farley that Tesla might offer its automotive operating system to others. Elon Musk suggested Thursday during a Twitter..., U0073 Definition: Control Module Communication Bus”A” Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Ford Fusion as it would any other. This code appears when something has interrupted the communication between two of your Fusion’s control modules. The most common causes of U0073 are wiring ..., The video focuses on the basic Toyota specific diagnostic error code.Contents:0:21 Basic DTC analysis according to OBD2 protocol standard.1:48 Insight into p..., C6 Tech/Performance - Plugged in my Solo2 DL and Now have U0073 code - New to this forum Went to the track and plugged in my Solo2 DL with the Z06 LS7 config. DTC went nuts. Unplugged the Solo2 cycled the power and things seemed to be ok but then when on the track noticed the engine was starting to miss on certain..., U0073 code is a communication fault code that indicates a problem with the control modules in the vehicle. Learn the symptoms, causes, and steps to solve this code and prevent further damage to the vehicle., I cleared the codes with a different scanner, but U0073 returns without CEL or lights appearing on the dash. Since the car runs and drives fine, I'm hopeful the code is a hiccup caused by the scanner and will clear by itself over time; similar to the issues others have had with using the Torque app or other OBD devices., U0073 Definition: Control Module Communication Bus”A” Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Buick Lucerne as it would any other. This code appears when something has interrupted the communication between two of your Lucerne’s control modules. The most common causes of U0073 are ..., U0073 Definition: Control Module Communication Bus”A” Off. U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Chevy Trax as it would any other. This code appears when something has interrupted the communication between two of your Trax’s control modules. The most common causes of U0073 are wiring ..., Conclusion. U0073 is usually caused by an issue with the wiring harness connection going in and out of the control module. Good luck fixing your 6! U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Mazda 6 as it would any other., Code U0121 stands for Lost Communication with Anti-lock Brake System Module. Anti-lock brakes are required on all modern vehicles. The antilock braking system (ABS) prevents wheel lockup by modulating the brakes in an emergency situation. Basically, the ABS system does what the driver used to do in the old days - pump the brakes during a panic ..., Looking for what “business casual” actually means? Find out more in our quick guide to the business casual dress code. Human Resources | What is WRITTEN BY: Charlette Beasley Publi..., PIT4730B Diagnostic Tip- Information for U0140 or U0073 (BCM Appears Off Line On The High Speed Buss) Models Brand: Model: Model Years: VIN: Engine: Transmissions: from to Buick Enclave 2008 - 2017 All All All All Buick Lucerne 2006 - 2011 All All All All Cadillac DTS 2006 - 2012 All All All All Cadillac Escalade 2007 - 2014 All All All All, To diagnose the U0073 2017 Toyota RAV4 code, it typically requires 1.0 hour of labor. The specific diagnosis time and labor rates at auto repair shops can differ based on factors such as the location, make and model of the vehicle, and even the engine type. It is common for most auto repair shops to charge between $75 and $150 per hour., U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Subaru BRZ as it would any other. This code appears when something has interrupted the communication between two of your BRZ's control modules. The most common causes of U0073 are, A U0073 code indicates that communication between your car's modules has been lost. There are numerous module devices located throughout your vehicle. These modules communicate with the PCM about the performance of your car via the CAN bus. The PCM then makes use of this data to make adjustments to your car engine's fuel consumption., U0073 Definition: Control Module Communication Bus"A" Off U0073 is a fairly common trouble code. It is generic, so it has the same meaning for your Cadillac CTS as it would any other. This code appears when something has interrupted the communication between two of your CTS's control modules. The most common causes of U0073 are, What is the Cost to Diagnose the Code U0073 2016 Chevrolet Silverado? Labor: 1.0. The cost to diagnose the U0073 2016 Chevrolet Silverado code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type., codes p1578 and p1560 and u0073. my car died while driving then the shift lock kept unlocking and locking randomly and I could only sometimes change gears. The gas gauge stops working then comes back on intermittently., Diagnostic trouble code (DTC) U0073 stands for "Control Module Communication Bus "A" Off." OBD code U0073 is a communication system DTC that applies to most vehicles. Usually, this code is triggered when communication is lost intermittently or fully between your vehicle's control modules.