I have concerns for the following codes and am not sure what they mean any help please...
U1040 Loss of Communication with TCS
U1160 Loss of Communications with LDCM
B0361 Left Actuator Feedback short to GND
U1064 Loss of Communications with DCM (No State of Health Message)
U1096 Loss of Communications with IPC (No State of Health Message)
U1016 Loss Of Communication with PCM (No SOH Message Received -RFA
C2120 TPM System malfunction (No Sensors Received –TPM
P1644 Delivered Torque Output Circuit –C
P0430 TWC System Low Efficiency Bank 2-A
P1571 ASR Desired Torque -C

 

Loss of comms can often be caused by a power glitch. Are they H (history) or C (current)?

If you don't have a particular problem and they are H codes, reset them and see if any reoccur. It may be that you had a battery disconnected at some time or a power spike.

 

I'll check again, I cleared it out this morning, went for 60 miles + and rec'd back the check engine light back on ugh

 

The check engine light is caused by the PCM Code 0430. It indicates there may be a problem with the catylitic converter on the passenger side of the car. I would work on that problem first before trying to solve the 2 Traction Control codes if you still have them.

DTC P0430 Catalyst System Low Efficiency Bank 2

Circuit Description
In order to maintain a reasonably low emissions of Hydrocarbons (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx), the engine controls system uses a three-way catalytic converter. The catalyst within the converter promotes a chemical reaction which oxidizes the HC and CO present in the exhaust gas. This reaction converts them into harmless water vapor and Carbon Dioxide. The catalyst also reduces NOx, converting it to Nitrogen. The PCM monitors this process using Bank 1 HO2S #2. Bank 1 HO2S #2, located in the exhaust stream past the three-way catalytic converter, produces an output signal which indicates the oxygen storage capacity of the catalyst. This determines the catalysts ability to convert exhaust emissions effectively. If the catalyst is functioning correctly, the Bank 1 HO2S #2 signal will be far less active than that produced by Bank 1 HO2S #1. If a problem exists which causes the PCM to detect excessive Bank 1 HO2S #2 activity outside of an acceptable range for an extended period of time, the PCM will set DTC P0420. This indicates that the three-way catalytic converters oxygen storage capacity is below a threshold considered acceptable.

Conditions for Setting the DTC
• No AIR, CKP, CMP, IAT, IC, MAF, MAP, ECT, TP, EVAP, Left Bank HO2S, Misfire, Left Bank Fuel Trim, Injector, VSS, Engine Protection, or Transmission DTCs are set.
• Engine is operating.
• ECT is greater than 65°C (149°F).
• Vehicle speed is less than 136 km/h (85 mph).
• Throttle angle is greater than 10%.
• Engine speed is less than 4000 RPM.
• MAP is between 25 kPa and 80 kPa.
• Air flow is between 14 gm/s and 40 gm/s.
• Closed loop fuel control enabled.
• The PCM determines oxygen storage capability of the catalytic converter has degraded below a calibrated threshold.

Action Taken When the DTC Sets
• The PCM illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails.
• The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Freeze Frame and/or Failure Records.

Conditions for Clearing the MIL/DTC
• The PCM turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
• A last test failed, or current DTC, clears when the diagnostic runs and does not fail.
• A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
• Use a scan tool in order to clear the MIL and the DTC.

Test Description
The numbers below refer to the step numbers on the diagnostic table.

4. Before replacing the three way catalytic converter, make sure that any conditions which may have caused the catalyst to be damaged have been corrected.

Step Action Value(s) Yes No

1 Did you perform the Powertrain On-Board Diagnostic (OBD) System Check ? -- Go to Step 2
Go to Powertrain On Board Diagnostic (OBD) System Check

2 Are any other DTCs set? -- Go to the applicable DTC table Go to Step 3

3 Check for the following conditions:
• Verify that the three-way catalytic converter is an original equipment part.
• Inspect the three-way catalytic converter for damage such as dents, severe discoloration caused by excessive temperature, holes, etc.
• Insure that internal three-way catalytic converter rattle caused by damaged catalyst is not present.
• Inspect exhaust system for leaks, damage, or loose or missing hardware in the area from the converter to the HO2S #2 primarily.
• Insure that the HO2S #1 and the HO2S #2 are secure and that their pigtails and wiring are not damaged or contacting the exhaust.
Was a problem found and corrected? -- Go to Step 5 Go to Step 4

4
Replace converter.
Is the action complete? -- Go to Step 5 --

5
1. Select the Diagnostic Trouble Code (DTC) option and the Clear DTC Information option using the scan tool.
2. Idle the engine at the normal operating temperature.
3. Select the Diagnostic Trouble Code (DTC) option and the Specific DTC option, then enter the DTC number using the scan tool.

4. Operate the vehicle within the conditions for setting this DTC as specified in the supporting text, if applicable.
Does the scan tool indicate that this test ran and passed? -- Go to Step 6 Go to Step 2

6 Select the Capture Info option and the Review Info option using the scan tool.
Does the scan tool display any DTCs that you have not diagnosed? -- Go to the applicable DTC table System OK

Bill

 

awesome awesome awesome thread thanks Bill for the help!

 

I cleared ran her again for the day and then only rec'd 2 codes that "H C"'s
B0361 Left Actuator Feedback short to GND
C2120 TPM System malfunction (No Sensors Received -TPM

 

this is link that may help:

http://forums.corvetteforum.com/show....php?t=1625418

 

Cant help on the B0361 I'm afraid.
On the C2120 do you have tire pressure monitors fitted? If so did they die at the same time? Are you getting XXXX on the gauge? Trying to work out if its the sensors or the receiver.

 

I believe that these are the only two codes that I am concerned with at this time
B0361 Left Actuator Feedback short to GND
C2120 TPM System malfunction (No Sensors Received -TPM

 

TPM stands for tire pressure monitor. Forgive me if I'm teaching you to suck eggs. The sensor in the tire transmits a signal to a receiver in the rear wheel well. The code is telling you that the receiver is not getting a signal from the sensors. That could be because:

The batteries in the wheel mounted sensors have died (possible on a 97 - battery life is 5-7 years)
The receiver is shot - you'll need to change it out. The key fob uses the same receiver so you may also get door lock issues?
Someone fitted non run flats and removed the sensors - you should get XXX codes on the DIC.