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P0171 code 2017 colorado v6

ricky c.

By ricky c.
in Troubleshooting & Maintenance

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ricky c. New Member

ricky c.

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Posted

Check engine light is on and I get service stability track randomly. My gas mileage is pretty bad average 13 miles pg. Cleaned MAF, changed spark plugs, don't see any vacuum leaks, cleaned the 4 VVT solenoids. Any ideas on what to check next 

CamGTP Senior Enthusiast

CamGTP

Posted
Posted

Just a visual of no vacuum leaks or you've smoke tested the engine for vacuum leaks?

 

If a smoke test shows zero leaks then it could be an injector issue or even the o2 sensor that is at fault. Hard to say for certain right now.

ricky c. New Member

ricky c.

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I did a smoke test and couldn't see any leaks. Also the onstar service sends me an email alert that there is an issue with my emissions system

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