Check Engine Light
Thread Starter
Instructor
Joined: Dec 2007
Posts: 237
Likes: 0
From: Monroe NC
Check Engine Light
Again today the check engine light came on. When I parked the car, leaving it running, I ran the codes and nothing showed up. Everything displayed was either "H" or listed as "no codes."
This car is relatively new to me....only a month and a half...and the only thing I've done to it was have the 1st to 4th shift disabled with the skip shift by-pass from Corvette Mods.
Is there a reason there is no code being displayed even though the CEL is on? Should I take it in and have a Auto Zone or Advance Auto read the codes when the light comes back on?
Thanks
This car is relatively new to me....only a month and a half...and the only thing I've done to it was have the 1st to 4th shift disabled with the skip shift by-pass from Corvette Mods.
Is there a reason there is no code being displayed even though the CEL is on? Should I take it in and have a Auto Zone or Advance Auto read the codes when the light comes back on?
Thanks
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
If you have a CEL,,,,,,,,,,,,,,,,,,,,,,,,, You have a DTC. When the CEL comes ON,,,, without turning the engine OFF,, clear any messages with the RESET BUTTON and read the DTCs.
You mentioned that you saw a HISTORY??? If you saw a H there was a DTC infront of it.
The read DTCs when using the IPC look like this in the DIC
10 PCM P-XXXX H
or
10 PCM P-XXXX C
or
10 PCM P-XXXX HC
or
10 PCM NO COMMS
You mentioned that you saw a HISTORY??? If you saw a H there was a DTC infront of it.
The read DTCs when using the IPC look like this in the DIC
10 PCM P-XXXX H
or
10 PCM P-XXXX C
or
10 PCM P-XXXX HC
or
10 PCM NO COMMS
Thread Starter
Instructor
Joined: Dec 2007
Posts: 237
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From: Monroe NC
Thanks Bill, but I seem to be missing something.
Shortly after the light came on:
1. I did pull into a parking lot
2. Leaving the engine running, I pressed the "reset"
3. I then brought up the codes
4. As the system ran through the codes I did not see anything indicating a "C" current.
5. Everything from RDCM on had an "H" - prior to that it literally reads "no codes." (It's a 99 if that makes a difference.)
I'm not sure it's pertinent, but the last time this happened, I cleared everything after the system ran its diagnosis - with engine running. This is first time the CEL has appeared since then.
Shortly after the light came on:
1. I did pull into a parking lot
2. Leaving the engine running, I pressed the "reset"
3. I then brought up the codes
4. As the system ran through the codes I did not see anything indicating a "C" current.
5. Everything from RDCM on had an "H" - prior to that it literally reads "no codes." (It's a 99 if that makes a difference.)
I'm not sure it's pertinent, but the last time this happened, I cleared everything after the system ran its diagnosis - with engine running. This is first time the CEL has appeared since then.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
EXACTLY!!!!!!!!!!!!!!!
POST ALL THE DTCS !!
However insignificant they seem and even if thay dont seem to be important,,, most of the time thay ALL tell a complex telling story as to what could be causing the issue..
EVEN U SERIES codes tell me a lot about the status of the modules in your car.
Bill
POST ALL THE DTCS !! However insignificant they seem and even if thay dont seem to be important,,, most of the time thay ALL tell a complex telling story as to what could be causing the issue..
EVEN U SERIES codes tell me a lot about the status of the modules in your car.
Bill
Thread Starter
Instructor
Joined: Dec 2007
Posts: 237
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From: Monroe NC
Okay, here are the codes. Please forgive if I get a letter wrong, I have a hard time writing, my hands shake pretty bad sometimes.
PCM No Code
TCS No Code
RTD No Code
BCM No Code
SJM No Code
IPC No Code
Radio No Code
HVAC No Code
LDCM No Code
RACM 8 codes
B2283 H
B2285 H
B2263 H
B2265 H
U1255 H
U1064 H
U1016 H
U1096 H
SCM 1 Code
B2860 H
BO RFA
U1096 H
U1064 H
U1016 H
PCM No Code
TCS No Code
RTD No Code
BCM No Code
SJM No Code
IPC No Code
Radio No Code
HVAC No Code
LDCM No Code
RACM 8 codes
B2283 H
B2285 H
B2263 H
B2265 H
U1255 H
U1064 H
U1016 H
U1096 H
SCM 1 Code
B2860 H
BO RFA
U1096 H
U1064 H
U1016 H
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
When you have all these DTCs do you ever have any problems with the Right Door working correctly electrically???
Do your FOBS and Tire pressure monitors work correctly??
I have a strange feeling that your having a door wiring harness power plug connection issue.
It can be an easy fix if that turns out to be contributing to the issue.
NONE of the DTCs that you listed should have caused the CEL to come on. If your having a serial data bus issue caused by a poor connection in the door power plug connector (this is a very common issue in C5s) that could possibly be causing your issues.
BC
Do your FOBS and Tire pressure monitors work correctly??
I have a strange feeling that your having a door wiring harness power plug connection issue.
It can be an easy fix if that turns out to be contributing to the issue.
NONE of the DTCs that you listed should have caused the CEL to come on. If your having a serial data bus issue caused by a poor connection in the door power plug connector (this is a very common issue in C5s) that could possibly be causing your issues.
BC
Thread Starter
Instructor
Joined: Dec 2007
Posts: 237
Likes: 0
From: Monroe NC
Thanks Bill...... When I purchased the car there were no key fobs available. The dealership where I bought it was trying to get one from the Chevy dealer, but we all know how that was going. He's sending me a check and I'm going to purchase my own. So until then.....
Using the key, everything works fine, one turn driver's door, two turns both doors three turns rear hatch.
I'll not worry until I get a fob and see what happens then.
Thanks to you and the others for your patience and advice.
Using the key, everything works fine, one turn driver's door, two turns both doors three turns rear hatch.
I'll not worry until I get a fob and see what happens then.
Thanks to you and the others for your patience and advice.
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Team Owner
Joined: Jul 2006
Posts: 22,109
Likes: 4,137
From: Kannapolis NC
Another post without a year of car. If you have a 99 as in your profile, make sure the dealer sends you a check to cover the 97-99 fobs. They are a lot more expensive than the newer fobs. For new ones you'll probably need about 70 bucks apiece. You can usually get them at gmpartshouse.com. Don't buy used ones for those models, you'll end up with non working fobs soon if not on arrival and still pay about the same price as new.