Need help with a C5 Check Engine Light
Thread Starter
Intermediate
Joined: Jul 2016
Posts: 27
Likes: 0
Need help with a C5 Check Engine Light
Yesterday while driving my 2002 C5 convertible on the highway my check engine light appears. I drove home and had the problem diagnosed as a P0102 and P0112 …….. The Mass airflow and temp sensor was bad. I replaced this part today, disconnected the battery to clear the code, and took the car for a ride. The car still jerked a little but no engine light. I took it out about an hour later drove about 15 miles, parked it about 5 minutes, restarted the engine, and noted the check engine light was on again but drove it about a mile this time and the temp gauge hit the red line. I waited awhile and disconnected the battery again and restarted with the engine light on and the temp gauge at redline. I drove the back home this way (about 13 miles) and parked the vehicle in the garage where it sits on a beautiful 90 degree day in Michigan
I might add the water pump and thermostat was replaced a couple years ago
Anybody have any similar problems, if so, how did you rectify it. Also did I do any damage by driving it home?
Thanks for all the insight and your comments.
I might add the water pump and thermostat was replaced a couple years ago
Anybody have any similar problems, if so, how did you rectify it. Also did I do any damage by driving it home?
Thanks for all the insight and your comments.
Melting Slicks
Joined: Nov 2014
Posts: 3,399
Likes: 1,339
From: Havre de Grace Maryland
I had a similar episode with the same codes (I think) last year. So I decided to clean my MAF. Still the same codes. Then I read on the forum about someone having the same issue and it was resoled by making sure the gas cap was correctly tightened. By any chance, did you recently get gasoline? Just saying. Hope you are able to correct is issue.
Thread Starter
Intermediate
Joined: Jul 2016
Posts: 27
Likes: 0
I had a similar episode with the same codes (I think) last year. So I decided to clean my MAF. Still the same codes. Then I read on the forum about someone having the same issue and it was resoled by making sure the gas cap was correctly tightened. By any chance, did you recently get gasoline? Just saying. Hope you are able to correct is issue.
Thread Starter
Intermediate
Joined: Jul 2016
Posts: 27
Likes: 0
If you had some diagnose the problem as the two codes you posted, you apparently do not know how to pull the codes on the C5 yourself. 
Suggest you read further and spend a few minutes learning how to retrieve the codes and then post the ones your car has stored.
Without codes we can guess all month long.
If you have never pulled codes on your C5 here is how:
https://youtu.be/SviRjIsy9G4
Post ALL the codes including the H or C or HC after each 5 character code. List the codes under the sensor they show with. is 10 - PCM or 28 - TCS or 40 - BCM ..... etc .....
If any sensor(s) have NO COMM next to them post that also.
Many here can help you understand the meaning of the codes your car may have.
Suggest you read further and spend a few minutes learning how to retrieve the codes and then post the ones your car has stored.
Without codes we can guess all month long.If you have never pulled codes on your C5 here is how:
https://youtu.be/SviRjIsy9G4
Post ALL the codes including the H or C or HC after each 5 character code. List the codes under the sensor they show with. is 10 - PCM or 28 - TCS or 40 - BCM ..... etc .....
If any sensor(s) have NO COMM next to them post that also.
Many here can help you understand the meaning of the codes your car may have.
I should also say that I am not a mechanic but will try and do a job if not too detailed or if I am provided information. Thanks again
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,615
Likes: 4,062
From: Cape Coral, Florida
I had a similar episode with the same codes (I think) last year. So I decided to clean my MAF. Still the same codes. Then I read on the forum about someone having the same issue and it was resoled by making sure the gas cap was correctly tightened. By any chance, did you recently get gasoline? Just saying. Hope you are able to correct is issue.
Moderator, Tech Contributor
Joined: Sep 2013
Posts: 15,615
Likes: 4,062
From: Cape Coral, Florida
Yesterday while driving my 2002 C5 convertible on the highway my check engine light appears. I drove home and had the problem diagnosed as a P0102 and P0112 …….. The Mass airflow and temp sensor was bad. I replaced this part today, disconnected the battery to clear the code, and took the car for a ride. The car still jerked a little but no engine light. I took it out about an hour later drove about 15 miles, parked it about 5 minutes, restarted the engine, and noted the check engine light was on again but drove it about a mile this time and the temp gauge hit the red line. I waited awhile and disconnected the battery again and restarted with the engine light on and the temp gauge at redline. I drove the back home this way (about 13 miles) and parked the vehicle in the garage where it sits on a beautiful 90 degree day in Michigan
I might add the water pump and thermostat was replaced a couple years ago
Anybody have any similar problems, if so, how did you rectify it. Also did I do any damage by driving it home?
Thanks for all the insight and your comments.
I might add the water pump and thermostat was replaced a couple years ago
Anybody have any similar problems, if so, how did you rectify it. Also did I do any damage by driving it home?
Thanks for all the insight and your comments.
Thread Starter
Intermediate
Joined: Jul 2016
Posts: 27
Likes: 0
8Vette7.... I took your advice and ran the diagnostics as you suggested and they are detailed below. (Thanks again for the instructions)
Any further assistance is greatly appreciated
Code Results
10 PCM...No Codes
28 TCS...No Codes
40 BCM...No Codes
58 SDM...No Codes
60 IPC...No Codes
80 Radio...No Codes
90 HiVac...No Codes
AO LDCM … 6 Codes
B2252H
B2208H
B2282H
B2284H
B2264H
U1064H
A1 RDCM... 4 Codes
B2283H
B2287H
B2285H
U1064H
A6 SCM...No Codes
BO RFA... No Codes
Any further assistance is greatly appreciated
Code Results
10 PCM...No Codes
28 TCS...No Codes
40 BCM...No Codes
58 SDM...No Codes
60 IPC...No Codes
80 Radio...No Codes
90 HiVac...No Codes
AO LDCM … 6 Codes
B2252H
B2208H
B2282H
B2284H
B2264H
U1064H
A1 RDCM... 4 Codes
B2283H
B2287H
B2285H
U1064H
A6 SCM...No Codes
BO RFA... No Codes
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