How do I fix the code P0171 on my Chevy?

How do I fix the code P0171 on my Chevy?

Remove the mass air flow sensor and clean the sensor using mass air flow cleaner or contact cleaner. Reinstall the mass air flow sensor and clear the check engine light using FIXD. If the check engine light comes back on with code P0171 continue the diagnostic process.

Can a bad purge valve cause code P0171?

Purge valve seal: If your engine is sounding rough, there could be a large leak causing the P0171 code. You can also check for a bad seal on the purge valve.

Can a bad gas cap cause P0171?

It doesn’t set a code that is false.

What causes trouble code on Equinox terrain p0171?

If nothing else solves the problem, clean the fuel injectors. Other possibilities for a Equinox P0171 or Terrain P0171 trouble code include a faulty EGR valve that’s allowing either exhaust or ambient air into the engine. Alldatadiy.com and Eautorepair.net are professional-grade shop manuals—period.

What does the p0171 code on a Chevrolet mean?

P0171 CHEVROLET Tech Notes. If the P0171 is combined with the P0174 code, it’s very likely that the problem is caused by an intake leak. If there are no intake leaks, the next step is to replace the air filter and clean the air flow meter.

What is the trouble code on my Chevy Equinox?

One of the most common trouble codes with the Chevy Equinox is the P0171 code. This code number references a number that is given to you when you plug your car into a OBDII scanner.

What causes a p0171 fuel trim system Lean Bank 1?

If the problem persists the front oxygen (O2) sensor may need to be replaced. The P0171 code could also be caused may be caused by one or more of the following: debris on the MAF sensor causing an incorrect reading, improper oil level, low or high fuel pressure, or Engine Control Temperature (ECT) Sensor reading inaccurate.