Coolant gives three different temperatures and the speedometer and RPMs are not registering?

AZDANNO04

MEMBER
2008 CHEVROLET COBALT
2.2L
4 CYL
2WD
MANUAL
136,989 MILES

I just put my car back together and I was able to start it, and everything was fine. I just moved the vehicle out of the garage and parked it. Two days later I started it up to run some errands and my instrument panel reads power steering, Coolant gives three different temperatures, my speedometer and RPMs are not registering. Everything was fine when I first started it and moved it out of the garage. Can you help me with where the fuses for the speedometer and RPMs and what should I do about the power steering even though it's working.

8 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

Check fuses: Start by inspecting the fuse box in your vehicle.

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Thursday, May 25th, 2023 AT 12:02 PM

AZDANNO04

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283 POSTS

2008 Cobalt 2.2 Ecotec, Manual transmission Coupe 140,000 miles.

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Wednesday, May 31st, 2023 AT 4:29 AM

AZDANNO04

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283 POSTS

Battery terminals are clean free from corrosions recently new battery checked and still providing volts 12.7.

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Wednesday, May 31st, 2023 AT 4:31 AM

KEN L

MASTER CERTIFIED MECHANIC
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What is the voltage when it is running? Also did you try swapping out the cluster?

https://www.2carpros.com/articles/how-to-check-a-car-alternator

Please go over this guide and get back to us.

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Thursday, June 1st, 2023 AT 2:47 PM

AZDANNO04

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The tow truck driver was asking what was wrong with the car and I told him what the obdII scan told me, but I think it was also the fuel pump since the car was sounding like it was having trouble getting fuel. He suggested it was the fuel pump as well.

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Friday, June 2nd, 2023 AT 3:37 PM

KEN L

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I don't think the fuel pump will cause the "Coolant gives three different temperatures and the speedometer and RPMs are not registering"

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Saturday, June 3rd, 2023 AT 11:05 AM

AZDANNO04

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Still won’t start. There was fuel coming out of fuel rail pressure relief valve. Replaced valve stem, the original was bent. But the vehicle still won’t start. Camshaft sensor still for check engine light.

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Sunday, June 4th, 2023 AT 6:55 PM

KEN L

MASTER CERTIFIED MECHANIC
47,513 POSTS

We had better do a CAN scan to see what's going on, you can get a CAN scanner (Controller Area Network) which will work on most cars from Amazon.

Here is a video to show you how:

https://youtu.be/u-4syLc-ifQ

and

https://www.2carpros.com/articles/can-scan-controller-area-network-easy

Please go over these guides and get back to us.

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Monday, June 5th, 2023 AT 1:22 PM