🔧 FixIt

🚗 CHEVROLET IMPALA — Diagnostic Trouble Codes

14 diagnostic trouble codes have been reported by CHEVROLET IMPALA owners to NHTSA. Click any code for detailed reports and causes specific to this vehicle.

Code Description Reports
P2138 Throttle/Pedal Position Sensor/Switch D/E Voltage Correlation 19
P2122 Throttle/Pedal Position Sensor/Switch D Circuit Low 8
P2135 Throttle/Pedal Position Sensor/Switch A/B Voltage Correlation 4
U0101 Lost Communication With TCM 3
P0601 Internal Control Module Memory Checksum Error 3
P0121 Throttle/Pedal Position Sensor/Switch A Circuit Range/Performance 2
P0300 Random/Multiple Cylinder Misfire Detected 2
P2176 Throttle Actuator A Control System - Idle Position Not Learned 2
P1682 P1684 2
P0411 AIR System A Incorrect Flow Detected 2
B0021 Left Curtain Deployment Control 1 2
P2127 Throttle/Pedal Position Sensor/Switch E Circuit Low 2
P0651 Sensor Reference Voltage B Circuit/Open 2
P0523 Engine Oil Pressure Sensor/Switch A High 2

Report counts based on NHTSA owner complaints. Codes are linked to the generic DTC code page for more information.

Got a Code on Your CHEVROLET IMPALA?

  1. 1
    Find your code above

    Click the code to see detailed data for your specific CHEVROLET IMPALA, including real owner reports.

  2. 2
    Check for recalls

    Enter your VIN at nhtsa.gov/recalls to check for free recall repairs.

  3. 3
    Get diagnosed

    A code is a starting point, not a final answer. Get a proper diagnosis before replacing parts.