STS AWD V6-3.6L (2007)
PROM - Programmable Read Only Memory: Customer Interest
Engine Controls - Erratic Fuel Gauge/DTC P2066
Bulletin No.: 08-08-49-001
Date: February 05, 2008
TECHNICAL
Subject:
Inaccurate Fuel Gage Readings, Fuel Gage Reads Empty when There is Fuel in Tank, Fuel Level Low Message in DIC, DTC P2066 Set (Reprogram
ECM)
Models:
2004-2006 Cadillac SRX
2004-2007 Cadillac CTS
2005-2007 Cadillac STS
with 2.8L or 3.6L Engine (VINS T, 7 - RPOs LP1, LY7)
Condition
Some customers may comment that the fuel gage reads empty when there is fuel in the tank. Also, the driver information center may display the "Fuel
Level Low" message.
A scan tool may reveal DTC P2066 set in the ECM.
Cause
An issue with the ECM software has been identified that will cause the ECM to increment the fuel used incorrectly if the vehicle is driven for a number
of short trips with frequent key cycles between refueling events.
Correction
If routine diagnosis using SI does not reveal any obvious cause, then reprogram the ECM with updated calibration files using the TIS2WEB Service
Programming System (SPS) application.
Warranty Information
For vehicles repaired under warranty, use the table.
Disclaimer
