DTC P0123

Issue Description

The P0123 DTC in Dodge vehicles indicates that the throttle/pedal position sensor "A" is producing a voltage signal that is too high, suggesting a malfunction in the sensor circuit.

Dodge P0123 Error Code

Causes

  • Faulty TPS.
  • Short to power in the sensor wiring.
  • Damaged or corroded TPS connector.
  • Faulty Powertrain Control Module (PCM).
  • Incorrectly installed aftermarket throttle body.

Symptoms

  • Check Engine Light (CEL) is On.
  • Engine may go into limp mode.
  • Hesitation or rough acceleration.
  • Poor throttle response.

Solutions

  • Inspect and replace faulty TPS.
  • Check sensor wiring for shorts or open circuits.
  • Clean and secure TPS connector.
  • Replace PCM if diagnostics confirm failure.
  • Verify correct installation of throttle body parts.
  • Clear code and conduct road test.

Dodge Error Codes

  • DTC P0121

    DTC P0121

    Throttle/Pedal Position Sensor A Range/Performance Problem

  • DTC P0128

    DTC P0128

    Coolant Thermostat (Coolant Temperature Below Thermostat Regulating Temperature)

  • DTC P0171 & P0174

    DTC P0171 & P0174

    Indicate issues related to the air-fuel mixture.

  • DTC P0301-P0308

    DTC P0301-P0308

    Individual cylinder misfires that caused by issues like a bad spark plug or coil, can also point to mechanical or fuel-related problems.