Temperature gauge

SAEED99

MEMBER
2002 CHEVROLET TAHOE
V8
4WD
AUTOMATIC
186,000 MILES

After I change the water pump, Temperature gauge is not working. When I switch on the ignition, its working well but after few seconds, the gauge goes down.

Wednesday, March 9th, 2011 AT 7:36 PM

5 Replies

JDL

MECHANIC
16,098 POSTS

Maybe air in the system? Check the coolant temp sensor. Any applicable trouble codes?

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Friday, March 11th, 2011 AT 1:24 AM

SAEED99

MEMBER
3 POSTS

No applicable trouble codes. Its all normal but everytime I start the vehicle, the gauge is working well but for few seconds only.I attached 1 picture showing the gauge which is not working. Thanks a lot. Hope you'll help me.

Image (Click to make bigger)

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Friday, March 11th, 2011 AT 4:19 PM

JDL

MECHANIC
16,098 POSTS

Nice job with the picture. The temp gage defaults to 160 degrees or less.
1, the pcm detects a problem with coolant temp sensor/circuit.
2, the instrument panel cluster loses class 2 communication with the pcm.

Check the coolant temp sensor and circuits.

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Friday, March 11th, 2011 AT 5:10 PM

SAEED99

MEMBER
3 POSTS

Thanks for the compliment.I didnt use my vehicle from march 11 coz I dont want to make more problem but lucky me, it solved my car problem coz like I mentioned before, I changed the water pump and "i think" the system format automatically so now its working well right now. Thanks for the time, really appreciate it.

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Sunday, March 13th, 2011 AT 7:24 PM

JDL