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P2122 on CHEVROLET IMPALA

Severity
Medium
NHTSA Reports
8
Most Affected
2009, 2010, 2011

What P2122 Means on Your CHEVROLET IMPALA

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

"Vehicle serviced by firestone complete auto care, november, december 2016 vehicle was in motion, on a city street vehicle exhibited reduced engine power, ran rough, triggered engine error alarm."

— 2009 CHEVROLET IMPALA owner • ENGINE • Filed 11/29/2016

"My name is [xxx] and i purchased a 2009 chevy impala, with 123,000 miles on it, in august 2015 from mac churchill auto mall in bedford, texas. i have had no problems with this car since its purchase until november 29th."

— 2009 CHEVROLET IMPALA owner • VEHICLE SPEED CONTROL,ELECTRONIC STABILITY CONTROL (ESC),ENGINE • Filed 11/29/2015

"I-40 east bound; 60 mph; coming down a 4 to 7% grade through the smokey mountains, north carolina side; 1st error: "service traction control, reduced engine power, service engine. approximately 5 minutes later 2nd error: "starting disable,service throttle" lost all power to vehicle."

— 2009 CHEVROLET IMPALA owner • ENGINE AND ENGINE COOLING,ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL • Filed 04/27/2012

"Service stabilitrak message displayed and reduced engine power to 0 mph while driving. Throttle body, Accelerator pedal position sensor (whole pedal assembly), and ecm replaced. Issue continues. P2138, P2122, P2127 codes present. Stonebriar chevrolet incompetent to resolve."

— 2010 CHEVROLET IMPALA owner • POWER TRAIN,ELECTRICAL SYSTEM,VEHICLE SPEED CONTROL • Filed 08/15/2021

"The diagnostic revealed that there are 11 codes in the vehicle system. these codes ranged from passkey system failures to evap codes to transmission. suspected failure of wiring harness altogether with possible bcm/cam failure as well."

— 2010 CHEVROLET IMPALA owner • ELECTRICAL SYSTEM,ELECTRONIC STABILITY CONTROL (ESC),ENGINE • Filed 07/22/2020

Data from NHTSA Vehicle Complaints Database. All reports are filed by vehicle owners directly with the U.S. Department of Transportation.

Common Causes of P2122 on CHEVROLET IMPALA

25%
12.5%
12.5%
12.5%
12.5%

Percentages based on NHTSA complaint component analysis for this vehicle.

Complaint Trend by Year

2009
3
2010
2
2011
2
2012
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.

P2122 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