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
42,895 POSTS

If you're experiencing issues with your instrument panel, specifically the power steering warning, erratic coolant temperature readings, and the speedometer and RPM not registering, there may be a few potential causes. It's important to note that without specific information about your vehicle's make, model, and year, I can only provide general guidance. Here are a few suggestions to help you troubleshoot the problem:

Check fuses: Start by inspecting the fuse box in your vehicle. Look for any blown fuses related to the instrument panel, power steering, or other relevant components. Consult your vehicle's manual or the fuse box cover for the specific fuse locations and ratings. Replace any blown fuses with new ones of the appropriate rating.

Battery connections: Ensure that the battery connections are secure and free from corrosion. Loose or corroded battery terminals can cause electrical issues and affect the instrument panel functionality. Clean the terminals if necessary and tighten them securely.

Wiring and connectors: Examine the wiring harness and connectors related to the instrument panel, power steering, and engine sensors. Look for any visible damage, loose connections, or disconnected wires. Make sure all connections are properly secured. If you find any damaged wiring, it may need to be repaired or replaced.

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

KEN L

MASTER CERTIFIED MECHANIC
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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

MEMBER
263 POSTS

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
42,895 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

Here is one for about $99.00 if you need it:

https://amzn.to/3ZixY4v

Please go over these guides and get back to us.

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