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Q. I have a 2005 Siverado V-6. Check engine light came on. AutoZone checked and it is Code PO128, Coolant issue. I replaced coolant sensor. Check engine light still on. The light stays on whether engine is cold or hot.

Name: L. J. Scanlan
Address: 204 S. Spring St.
City: Cary
State: IL
Zipcode: 60013
Business: Mechanic
Experience: 30
Expertise: General
Website:

Ans. Are you pumping gas into your truck while the engine is still running? If so, this can create a vacuum and cause your check engine light to come on. If this isnt your problem, you may have bad sensor wires. Good Luck!

 

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