Probably a stupid question but where do I look up codes and what they mean.

BTW what does "H" at the end of each code mean.

Thanks in advance
Rich. :confused:

 

It means it is not a current code it is History.

Anything with a C suffix indicates the problem still exists.

 

Here are the codes I've pulled up:

10 PCM- No Codes
28 TCS- No codes
40 BCM- No Codes
58 SDM- U1016 H, U1096 H

60- IPC- No Codes
80 Radio- No Codes
99 HVAC- No codes
A0 LDCM- B2282 H, B2284 H, U1064 H, U1016 H

A1 LDCM- B2283 H, B2285 H, U1064 H, U1016 H

B0 RFA- U1096 H, U1064 H, U1016 H

:confused:

 

http://www.zo6vette.com/ipc.txt

 

DsC5,

Thanks for the link but If you don't mind. I've also go this code: 58 SDM. Do you know which one this is?

Thanks
Rich.

 

The first number of the IPC code refers to the module that set the error. In this case, the "58" refers to the "SDM" or Inflatable Restraint Sensing and Diagnostic Module.

The "U1016" and "U1096" respectfully identify the PCM (Powertrain Control Module) and the IPC (Instrument Panel Cluster). As stated before, the "H" refers to a "History" code, and a "C" to a "Currently Active" code. To confuse the issue some more, some faults (doors, etc) will ONLY show a "H" code even if the fault is currently active. :)

In your case, the SDM has identified communication problems with the PCM and the IPC. (If the IPC had identified a problem with the SDM, then the error message would have been "60 IPC U1088" The "U1088" being the ID of the SDM.)

 

So in your best guess. What do these codes say about my ride. I bought it about a month ago and found a leaking battery. I disconnected the ECM, I think, to inspect the case for corrosion.

Again thanks in advance
Rich.

 

There are a number of threads in the archives on leaking batteries, with attendant damage to wiring (etc) below the battery.

All the codes you identified were History codes, that is, not currently active. If you have not already done so, be sure to reset (clear) this codes. Then monitor the IPC periodically to see if the codes return, that will determine if any repair action is required.

Here are the codes I've pulled up:
...
58 SDM- U1016 H, U1096 H - Indicates a Data Link Communication (serial data circuit connecting the various C5 computers) problem existed at one time between the Inflatable Restraint Sensing and Diagnostic Module (SDM) and the Powertrain Control Module (PCM - U1016) and the SDM and the Instrument Panel Cluster (IPC - U1096).

.........

A0 LDCM- B2282 H, B2284 H, U1064 H, U1016 H - The Driver Door Module (DDM or sometimes the Left Door Control Module LDCM) has identified faults:

The U1064 and U1016 codes in this case indicate that the LDCM had serial data communication problems with the Body Control Module (BCM - U1064) and also that the LDCM had serial data communication problems with the PCM (U1016).

A1 LDCM - A1 is the Passenger Door Module. In this case the Passenger Door Module also has serial data communication problems with the BCM and the PCM (U1064 H, U1016 H)

B2282, B2283, B2284, B2285 are similar codes that relate to the voltages supplied to the driver and passenger door modules. THESE DTCs CAN ONLY BE SET AS HISTORY CODES EVEN IF THE MALFUNCTION IS CURRENT. There is no DTC message to the driver when these codes are set.

These codes could be set with an intermittent open or short to ground, or they might be set if the battery voltage is out of range, or they might be set with a charging system malfunction.

A scan tool would be needed to monitor system voltages while the door locks/mirrors were being operated - this would be necessary to run the diagnostic tests. Do the windows, remote door locks, and mirrors work OK? If so, I would just reset the codes and press on!


B0 RFA- U1096 H, U1064 H, U1016 H - B0 is the Remote Control Door Lock Receiver (RCDLR), these "U" codes indicate serial data circuit communication problems (History) with the IPC, BCM, and PCM.

Other than the door codes (which MAY be currently active or History), I wouldn't take the car to the dealer for an "H" code that resets and stays reset. The mechanics would be chasing ghosts.

 

Mapman, you are the uhhhhh man. Went for a drive today and now I've got a P0410 H C code. Now what?

By the way thanks a bunch for the long reply.

Rich. :cheers:

 

P0410 is an emissions related code. The secondary air injection (AIR) system is to lower exhaust emissions just after start-up. The AIR pump runs for about a minute after start-up. The Powertrain Control Module (PCM) commands the AIR pump on at start-up. The PCM monitors the Heated Oxygen Sensors (HO2S) to check the exhaust emissions. P0410 code is set by the Powertrain Control Module (PCM) if the HO2S sensors do not respond as expected. You should have also got a malfunction indicator light.

Have you done any recent work on the exhaust system? P0410 is a common code after header swaps. This code can also be set by a number of physical problems with the AIR system (kinked hoses, moisture/debris in the AIR pump, restrictions in the pump inlet, duct or filter, etc.)

If this is just a History code I would just monitor it. You might also search the archives for P0410 for other ideas as P0410 seems to be a "popular" code :lol: . If there is a continuing problem, then a scan tool and access to a shop manual is needed to run the diagnostic table.

 

He has a "C" so it is current along with an H. The air pump isn't causing a voltage change in the sensors (by pumping air into the headers which would change the O2 level). Like Mapman says either the air isn't getting pumped in the first place or there is a restriction before the air separates for both header banks.