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P0121 on CHEVROLET TRAVERSE

Severity
Medium
NHTSA Reports
3
Most Affected
2011, 2010

What P0121 Means on Your CHEVROLET TRAVERSE

Real CHEVROLET TRAVERSE Owner Reports (Source: NHTSA Complaints Database)

"Chevy traverse 2010 with 74k miles. driving vehicle on highway during morning traffic. vehicle check engine light came on, service stabilitrak warning, traction control off warning, and reduced engine power warning. vehicle suddenly reduced engine power from 65mph to 25mph."

— 2010 CHEVROLET TRAVERSE owner • ELECTRICAL SYSTEM • Filed 12/29/2014

"Vehicle had error messages, service traction control, traction control is off, service stabilitrax, engine power is reduced. vehicle was slow to accelerate and experienced decreased speed. vehicle vibrating while idling."

— 2011 CHEVROLET TRAVERSE owner • ELECTRONIC STABILITY CONTROL (ESC),TRACTION CONTROL SYSTEM • Filed 02/09/2015

"The first time this happened, i was driving a hilly back road from school the service stabilitrac and traction control warning lights came on then the engine power is being reduced warning light came on and the car immediately slowed to a crawl with very little steering control."

— 2011 CHEVROLET TRAVERSE owner • ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC) • Filed 10/06/2014

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 TRAVERSE

33.3%
33.3%
33.3%

Percentages based on NHTSA complaint component analysis for this vehicle.

Complaint Trend by Year

2010
1
2011
2

What To Do Next

  1. 1
    Check for recalls on YOUR VIN

    Go to nhtsa.gov/recalls and enter your VIN. Free repairs if your vehicle is covered.

  2. 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.

  3. 3
    Compare repair quotes

    Get 2-3 quotes. Dealer vs independent shop prices often differ 30-50% for the same repair.

P0121 on Other Vehicles

Data sourced from the National Highway Traffic Safety Administration (U.S. Department of Transportation) and the SAE J2012 OBD-II standard. Code definitions follow the SAE J2012 / ISO 15031-6 standard. Owner reports are filed directly with NHTSA by vehicle owners. This information is provided for educational purposes only and should not replace professional automotive diagnosis. Always consult a qualified mechanic for vehicle repair decisions.

Last updated: March 2026