Input / diagnosis of multiple error codes
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From: Philly Area PA
Input / diagnosis of multiple error codes
While running the car today got check engine light and found the following stored codes:
P0171 Fuel Trim System Lean bank 1-B
P0174 Fuel Trim System Lean bank 2-B
P1431 Fuel Level Sensor 2 Circuit Performance -C
P1433 Fuel Level Sensor 2 High Voltage -C
P1626 Theft Deterrent System Fuel enable Circuit -C
U1096 Loss of Communications with IPC
U1064 Lose of Communications with DCM
B2282 Battery #1 Fault DCM-LEFT
B2284 Battery #2 Fault DCM-LEFT
U1064 Loss Of Communication with DCM (No SOH Message Received -RFA
B2283 Battery #1 Fault DCM-RIGHT
B2285 Battery #2 Fault DCM-RIGHT
Cleared codes and only the following reoccurred:
P0171 Fuel Trim System Lean bank 1-B
P0174 Fuel Trim System Lean bank 2-B
Any input on what might be going on? No drivability problems. Have Haltech intake and that's it for mods aside from CLB.
Thanks,
Scott
P0171 Fuel Trim System Lean bank 1-B
P0174 Fuel Trim System Lean bank 2-B
P1431 Fuel Level Sensor 2 Circuit Performance -C
P1433 Fuel Level Sensor 2 High Voltage -C
P1626 Theft Deterrent System Fuel enable Circuit -C
U1096 Loss of Communications with IPC
U1064 Lose of Communications with DCM
B2282 Battery #1 Fault DCM-LEFT
B2284 Battery #2 Fault DCM-LEFT
U1064 Loss Of Communication with DCM (No SOH Message Received -RFA
B2283 Battery #1 Fault DCM-RIGHT
B2285 Battery #2 Fault DCM-RIGHT
Cleared codes and only the following reoccurred:
P0171 Fuel Trim System Lean bank 1-B
P0174 Fuel Trim System Lean bank 2-B
Any input on what might be going on? No drivability problems. Have Haltech intake and that's it for mods aside from CLB.
Thanks,
Scott
Last edited by NOSLO6; Jul 31, 2005 at 07:07 AM.
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Since only the lean codes remain, I'm starting to check locations for an air leak. The air bridge post-MAF looks okay-- are there other notorious (or good to check) spots where I might have a leak?
If I reset the codes, it will code again even at light cruising so it must be a pretty sizable one somewhere, if it is a leak.
Thanks,
Scott
If I reset the codes, it will code again even at light cruising so it must be a pretty sizable one somewhere, if it is a leak.
Thanks,
Scott
Melting Slicks
Joined: Jan 2001
Posts: 2,635
Likes: 2
From: Aloha, Oregon
Originally Posted by NOSLO6
Since only the lean codes remain, I'm starting to check locations for an air leak. The air bridge post-MAF looks okay-- are there other notorious (or good to check) spots where I might have a leak?
If I reset the codes, it will code again even at light cruising so it must be a pretty sizable one somewhere, if it is a leak.
Thanks,
Scott
If I reset the codes, it will code again even at light cruising so it must be a pretty sizable one somewhere, if it is a leak.
Thanks,
Scott
Robert
www.gen3motorsports.com
Le Mans Master
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From: Slave to the evil empire
Cruise-In V Veteran
St. Jude Donor '04
I know this may sound strange but how long since you changed your oil?
I'm almost certain the service manual lists this as one of the possible causes of that fault.
I'm almost certain the service manual lists this as one of the possible causes of that fault.
Thread Starter
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From: Philly Area PA
Problem solved.
Took off intake bridge and found a possible leak source at the plastic elbow connecting the filter to the MAF. Plastic had gotten soft (underhood temps, I suppose) and bowed in somewhat under the band clamp where the tightening bolt is housed. Took it off, gently molded the plastic back into it's original (round) shape, and re-connected band clamp using a bit less torque.
Interesting that a pre-MAF air leak could cause a lean condition-- I was originally focused on an upstream leak, for obvious reasons. Maybe the lack of diffuser screens in the C5 MAF caused it to get out of whack when a bit of turbulence (from leak) was introduced. Just speculation.
Thanks to all for the tips.
Scott
Took off intake bridge and found a possible leak source at the plastic elbow connecting the filter to the MAF. Plastic had gotten soft (underhood temps, I suppose) and bowed in somewhat under the band clamp where the tightening bolt is housed. Took it off, gently molded the plastic back into it's original (round) shape, and re-connected band clamp using a bit less torque.
Interesting that a pre-MAF air leak could cause a lean condition-- I was originally focused on an upstream leak, for obvious reasons. Maybe the lack of diffuser screens in the C5 MAF caused it to get out of whack when a bit of turbulence (from leak) was introduced. Just speculation.
Thanks to all for the tips.
Scott
