P0171 on GMC TERRAIN
What P0171 Means on Your GMC TERRAIN
Real GMC TERRAIN Owner Reports (Source: NHTSA Complaints Database)
"I've been having same issues Occurring since I Signed my purchase agreement. The constant rattle at about 1500 RPM, The oil leaves At such a rapid rate That I have to monitor it every day As to make sure the level doesn't go too low."
"Tl* the contact owns a 2013 gmc terrain. the contact stated that the service engine indicator illuminated and an abnormal noise was heard. in addition, the instrument panel shorted out due to an electrical failure, which also caused all the gauges and warning indicators not to function."
"My check engine light comes on intermittently, since March 2024, after having Cabin & Engine air filters replaced. Each time, Iām told it is code P0171. This has happened too many times for my comfort. Usually, it happens around the time my gas gets below 1/2 tank or after I fill up my gas tank."
"My check engine light came on and I got it hooked up to get the code of P0171 - Upon checking it was different things like O2 sensor the Mass Airflow sensor, fuel pump issue etc."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0171 on GMC TERRAIN
Percentages based on NHTSA complaint component analysis for this vehicle.
Complaint Trend by Year
What To Do Next
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1
Check for recalls on YOUR VIN
Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.
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2
Get a proper diagnosis
A code alone doesn't tell you the exact failed part. A diagnostic at a shop ($50-$150) pinpoints the root cause before you spend money on parts.
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3
Compare repair quotes
Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.