P2122 Mercury Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit Low
Quick Answer
The P2122 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the throttle/pedal position sensor/switch 'D' circuit being too low. Common causes include Faulty throttle position sensor, Corroded or damaged wiring/connectors in the sensor circuit, ECM software issues. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P2122 Mercury indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit Low.
- Common causes
- Common causes include Faulty throttle position sensor, Corroded or damaged wiring/connectors in the sensor circuit, ECM software issues.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P2122 Mercury Description
The P2122 diagnostic trouble code (DTC) for Mercury vehicles indicates a problem with the throttle/pedal position sensor/switch 'D' circuit being too low. This sensor is responsible for monitoring the position of the throttle pedal and sending corresponding signals to the engine control module (ECM) to adjust the throttle opening. When the sensor detects a lower than expected voltage signal, it triggers the P2122 code. This can lead to improper throttle response, reduced engine performance, and potential safety hazards while driving.
Common Causes of P2122 Mercury
- Faulty throttle position sensor
- Corroded or damaged wiring/connectors in the sensor circuit
- ECM software issues
- Mechanical issues with the throttle body
- Water or debris intrusion in the sensor
Symptoms of P2122 Mercury
- Reduced engine power
- Unresponsive throttle pedal
- Engine stalling or hesitation
- Illumination of the Check Engine Light
- Vehicle going into limp mode
How to Fix P2122 Mercury
- Diagnose the issue by using a scan tool to read the code and check live data from the throttle position sensor.
- Inspect the wiring and connectors for any damage or corrosion. Repair or replace as necessary.
- Test the throttle position sensor using a multimeter to ensure it is sending the correct voltage signals.
- If the sensor is faulty, replace it with a new one following manufacturer's guidelines.
- Clear the DTC and perform a test drive to ensure the issue has been resolved.
Cost to Fix P2122 Mercury
The cost of repairing a P2122 code on a Mercury vehicle can vary depending on the specific model and year. However, on average, the replacement of a throttle position sensor can range from $100 to $200, including parts and labor. Additional costs may apply if there are other underlying issues that need to be addressed. It's recommended to consult with a certified mechanic or dealership for an accurate cost estimate based on your vehicle's make and model.
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