fed up with this...
06-09-2012, 09:01 PM
#1
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fed up with this...
OK, I put my new o2 sensor in and I was one monitor away and as soon as I plg my scanner in it gives me the code U0073. WTF this is happening again!??!?!
Just to test it I erased it, drove home from my girlfriends house plugged the scanner in with the car on and the light came on as soon as I hit the sync button, WTF is up with this ****???
PLEASE PLEASE PELASE help, i have inspection due this month.
Just to test it I erased it, drove home from my girlfriends house plugged the scanner in with the car on and the light came on as soon as I hit the sync button, WTF is up with this ****???
PLEASE PLEASE PELASE help, i have inspection due this month.
06-09-2012, 10:31 PM
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I'm sorry that I'm not able to provide any technical insight into the code that your Cobalt is currently showing; hopefully a member of the SS community will jump on soon for you with more information. Otherwise, if I can check into warranty or recall info or if you decide to work with a dealership please send me a private message and I'll do my best!
Sarah
GM Customer Service
Sarah
GM Customer Service
06-09-2012, 10:38 PM
#4
You know you have more than 1 o2 sensor?
Dude you didn't even take the advice from your first post.....
https://www.cobaltss.net/forums/08-1...-u0073-267815/
Go get a tch2 scan done, it's a comm error. May not even be a o2
Dude you didn't even take the advice from your first post.....
https://www.cobaltss.net/forums/08-1...-u0073-267815/
Go get a tch2 scan done, it's a comm error. May not even be a o2
06-09-2012, 11:04 PM
#5
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I'm not sure how you read a U code. But if you do have one of those expensive scanners, I'm not sure why you weren't able to look the code up. Anyways, Here you go. Your welcome.
DTC U0073
Circuit Description
The GMLAN serial data circuits are controller area network (CAN) high and/or low speed serial data buses used to communicate information between the control modules. Typical data transmission speeds must be high enough to ensure that a required real-time response is maintained. There are two different types of GMLAN serial data circuits, the High speed 2-wire circuit and Low speed single wire circuit. Refer to Data Link References (See: Powertrain Management\Computers and Control Systems\Information Bus\Testing and Inspection\Initial Inspection and Diagnostic Overview) for the complete description of the buses used on this vehicle. The GMLAN serial data circuits also communicate directly to the data link connector (DLC). Messages are interpreted by the externally connected CANdi module which acts as a transceiver for the scan tool.
Modules connected to the GMLAN serial data circuits monitor communications during normal vehicle operation, where operation information is exchanged among the modules. All the modules on the GMLAN networks, maintain a transmit error counter (TEC) and a receive error counter (REC). The counter values increase with detected errors and will decrease with error-free messages. If the TEC value exceeds 255, the controller removes itself from the network and DTC U0073 will result.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC U0073 Controller Area Network (CAN) Bus Communication
Conditions for Running the DTCs
Supply voltage to the modules are in the normal operating range.
The vehicle is in the RUN power mode.
Conditions for Setting the DTC
The module setting the DTC has attempted to establish communications on the GMLAN circuits for more than 7 times.
Action Taken When the DTCs Sets
The module suspends all message transmission.
The module uses default values for all parameters received on the serial data circuits.
The module inhibits the setting of all other communication DTCs.
Conditions for Clearing the DTC
A current DTC clears when the malfunction is no longer present.
A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.
Diagnostic Aids
This DTC cannot be retrieved with a current status. Diagnosis of a current DTC is accomplished via the symptom, Scan Tool Does Not Communicate with High and/or Low Speed GMLAN Device. Refer to Control Module References (See: Testing and Inspection\Programming and Relearning) for the correct procedure for the specific module(s) and the busses they use to communicate.
An intermittent condition is likely to be caused by a short on the GMLAN serial data circuits. Use the Scan Tool Does Not Communicate with High and/or Low Speed GMLAN Device procedure in order to isolate an intermittent condition. Refer to Control Module References (See: Testing and Inspection\Programming and Relearning) for the correct procedure for the specific modules.
DTC U0073
Circuit Description
The GMLAN serial data circuits are controller area network (CAN) high and/or low speed serial data buses used to communicate information between the control modules. Typical data transmission speeds must be high enough to ensure that a required real-time response is maintained. There are two different types of GMLAN serial data circuits, the High speed 2-wire circuit and Low speed single wire circuit. Refer to Data Link References (See: Powertrain Management\Computers and Control Systems\Information Bus\Testing and Inspection\Initial Inspection and Diagnostic Overview) for the complete description of the buses used on this vehicle. The GMLAN serial data circuits also communicate directly to the data link connector (DLC). Messages are interpreted by the externally connected CANdi module which acts as a transceiver for the scan tool.
Modules connected to the GMLAN serial data circuits monitor communications during normal vehicle operation, where operation information is exchanged among the modules. All the modules on the GMLAN networks, maintain a transmit error counter (TEC) and a receive error counter (REC). The counter values increase with detected errors and will decrease with error-free messages. If the TEC value exceeds 255, the controller removes itself from the network and DTC U0073 will result.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC U0073 Controller Area Network (CAN) Bus Communication
Conditions for Running the DTCs
Supply voltage to the modules are in the normal operating range.
The vehicle is in the RUN power mode.
Conditions for Setting the DTC
The module setting the DTC has attempted to establish communications on the GMLAN circuits for more than 7 times.
Action Taken When the DTCs Sets
The module suspends all message transmission.
The module uses default values for all parameters received on the serial data circuits.
The module inhibits the setting of all other communication DTCs.
Conditions for Clearing the DTC
A current DTC clears when the malfunction is no longer present.
A history DTC clears when the module ignition cycle counter reaches the reset threshold, without a repeat of the malfunction.
Diagnostic Aids
This DTC cannot be retrieved with a current status. Diagnosis of a current DTC is accomplished via the symptom, Scan Tool Does Not Communicate with High and/or Low Speed GMLAN Device. Refer to Control Module References (See: Testing and Inspection\Programming and Relearning) for the correct procedure for the specific module(s) and the busses they use to communicate.
An intermittent condition is likely to be caused by a short on the GMLAN serial data circuits. Use the Scan Tool Does Not Communicate with High and/or Low Speed GMLAN Device procedure in order to isolate an intermittent condition. Refer to Control Module References (See: Testing and Inspection\Programming and Relearning) for the correct procedure for the specific modules.
06-10-2012, 11:46 AM
#8
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it only happens when i plug in my scanner never happens any other time, and I know my old post and the dealership charges you just to hook the shitty scanner up
06-10-2012, 11:58 AM
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06-11-2012, 11:05 AM
#12
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You know what I meant smartass.. =]
Not that many apparently...plus the code hasnt come back I am not hooking my scanner up anymore, cause I honestly think thats the problem, it never comes up on its own when I drive, its only I connect so yea I'm done using it.
06-11-2012, 12:15 PM
#13
I had a problem with a U0073 when my Dashdaq cable going to the OBDII port went bad. It developed a short, causing things to freak out due to intermittent communications over the network caused by the short. When using a different cable for a scanner or yet another cable for the Dashdaq, it never popped up with either of them. Your cable may be bad.
Errors popping up due to network communication issues:
U0073 - YouTube
Codes cleared and then car freaking out again at idle:
U0073 (Part 2) - YouTube
The idle was completely constant in this video, but the gauge was freaking out.
Errors popping up due to network communication issues:
U0073 - YouTube
Codes cleared and then car freaking out again at idle:
U0073 (Part 2) - YouTube
The idle was completely constant in this video, but the gauge was freaking out.
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