Inaccurate Fuel Gauge Readings, Fuel Gauge Reads Empty When There is Fuel in Tank, Fuel Level Low Message in DIC, DTC P2066 Set (Reprogram ECM)
| 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:
Labor Operation | Description | Labor Time |
|---|---|---|
J6354 | Powertrain Control Module Engine Reprogramming with SPS | 0.4 hr |
Add: | Diagnosis Time | 0.0-0.3 hr |
