OBD Guide

P2126

Throttle/Pedal Position Sensor/Switch E Circuit Range/Performance

Severity
⚠️ Medium
Can you drive?
Limited driving only, diagnose soon
Approx. repair cost
$17–50 (est.)

Symptoms

  • Unstable engine operation
  • Acceleration problems
  • Increased fuel consumption
  • Check Engine light comes on
  • Switching to emergency engine operation mode

Causes

  • Gas pedal position sensor malfunction
  • Open or short circuit in the sensor circuit
  • Poor contact in the sensor connector
  • Problems with the engine ECU
  • Corroded or damaged wires

How to Fix

  1. Check the integrity of the sensor circuit
  2. Clean sensor connector contacts
  3. Check sensor resistance
  4. Replace the gas pedal position sensor if necessary
  5. Check and update the ECU firmware

Related codes

Error P2126 by Vehicle Brand