P2121

Symptoms

• Unstable engine operation at idle
• Delayed response to pressing the gas pedal
• Engine transition to emergency mode
• Check Engine Light Illuminates
• Reduced engine power

Causes

• Gas pedal position sensor malfunction
• Open or short circuit in the sensor circuit
• Poor contact in the sensor connector
• Corroded or damaged wires
• Engine control unit malfunction

How to Fix

1. Check the condition of the gas pedal position sensor
2. Check the continuity and resistance of the sensor circuit
3. Inspect connectors and contacts for corrosion or damage
4. If necessary, replace the gas pedal position sensor
5. Check and, if necessary, replace the engine control unit

Related codes

Error P2121 by Vehicle Brand