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P0121 on TOYOTA COROLLA

Severity
Medium
NHTSA Reports
2
Most Affected
2006, 2009

What P0121 Means on Your TOYOTA COROLLA

Real TOYOTA COROLLA Owner Reports (Source: NHTSA Complaints Database)

"I have a 2006 toyota corolla, with intermittent problem with the acceleration of the car. i took it in and the dealer is saying that there is not problem with the acceleration of the care. but they said there is a bad throttle position sensor and that it would cost we $1200.00 to repair."

— 2006 TOYOTA COROLLA owner • FUEL SYSTEM, OTHER • Filed 12/10/2009

"While driving on the highway on february 23, 2012, i lost acceleration with no warning whatsoever. no other problems were encountered at that time. i was able to get off the highway and have my car towed to the dealership."

— 2009 TOYOTA COROLLA owner • VEHICLE SPEED CONTROL • Filed 02/23/2012

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 TOYOTA COROLLA

50%
50%

Percentages based on NHTSA complaint component analysis for this vehicle.

Complaint Trend by Year

2006
1
2009
1

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