Oct 30, 2017, 7:33 AM
Post #2 of 2
First thing is to see if there is an update calibration that might solve your P code issues.
Re: 2005 Cadillac STS v8 stability system problems please help!
Bulletin No.: 09-06-04-032A
Date: August 06, 2009
Subject: Check Engine Light On, DTC P1101, P0068, P0171, P0174 (Reprogram ECM)
2004-2006 Cadillac SRX, XLR
2005-2006 Cadillac STS
Equipped with Engine RPO LH2
Please Refer to GMVIS
This bulletin is being revised to change the labor time information. Please discard Corporate Bulletin Number 09-06-04-032 (06 - Engine/Propulsion System)
Some customers may comment on an illuminated check engine light shortly after a cold start with no engine performance concerns. Upon inspection, DTC P1101 (Intake Air Flow System Performance) may be set. In some instances, DTCs P0068 (Throttle Body Airflow Performance), P0171 (Fuel Trim System Lean Bank 1) and/or P0174 (Fuel Trim System Lean Bank 2) may eventually set as a result of the DTC P1101.
Verify the condition. If the diagnostics in SI for the conditions described above do not isolate a fault, reprogram the ECM with the revised calibration that has been developed to address this condition.
Verify that the multiple diagnostic interface (MDI) that is being used is configured to the PC that will be used.
Which module had the U code stored?
Sometimes U codes can be erroneous. If the U code kept coming back after clearing, then it might be something to look into.
The C0253 might be setting your stab light.
The following conditions can cause this concern:
^ Improper steering alignment.
^ Open, short to ground, or short to voltage.
^ Internal lateral accelerometer failure.
^ EBCM internal failure.
Someone is going to have to do some diagnosis of the circuits to isolate the fault.
Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.