P2120

Throttle/Pedal Position Sensor/Switch D Circuit

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$17–56 (est.)

Symptoms

Unstable engine operation
Check Engine light comes on
Power Loss
Acceleration problems
The car goes into emergency mode

Causes

Open or short circuit in the sensor circuit
Gas pedal position sensor malfunction
Poor contact in the sensor connector
Wiring harness damage
Engine control module (ECM) malfunction

How to Fix

Check the integrity of the sensor circuit
Inspect the connectors and contacts of the sensor
Check the resistance of the gas pedal position sensor
Replace sensor if necessary
Check the operation of the engine control unit

Related codes

P2121 P2122 P2123