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Dave Nova, Cadillac Technician
Category: Cadillac
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Experience:  ASE Master Certification. GM World Class Certification
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2005 cadillac cts: fuel gage stopped working and I

Resolved Question:

My 2005 cadillac cts fuel gage stopped working and I can't find the fuse location in the manual.Can you help?
Submitted: 2 years ago.
Category: Cadillac
Expert:  Dave Nova replied 2 years ago.
Hello and thank you for using JustAnswer. My name is XXXXX XXXXX X will do my best to help you with your Cadillac problem.

Do the other gauges in the panel all work as they should?
Customer: replied 2 years ago.
Yes
Expert:  Dave Nova replied 2 years ago.
This is not a fuse problem then. All of the gauges in the panel operate from the same fuse. Does the gauge go to empty?
Customer: replied 2 years ago.
yes
Expert:  Dave Nova replied 2 years ago.
There is a software problem in the engine control computer that causes this. You will need to have your dealer reprogram the computer with the updated software. See bulletin below describing this conditon and the fix.

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.

Dave Nova, Cadillac Technician
Category: Cadillac
Satisfied Customers: 18797
Experience: ASE Master Certification. GM World Class Certification
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