P0121 on CHEVROLET IMPALA
What P0121 Means on Your CHEVROLET IMPALA
Real CHEVROLET IMPALA Owner Reports (Source: NHTSA Complaints Database)
"Ongoing issue with error message relating to "service traction control" "reduced engine power" appeared 4/10/2016. ongoing history and service related to throttle position and sensor (also serviced) codes p2176; p 2135."
"I am having problems with my 2009 chevy impala, it started at 43k, the acceleration pedal was changed when the reduced engine power/service traction control came on."
Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.
Common Causes of P0121 on CHEVROLET IMPALA
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.