P2123 Mercury Code - Throttle/Pedal Position Sensor/Switch 'D' Circuit High
Quick Answer
The P2123 diagnostic trouble code for Mercury vehicles indicates an issue with the Throttle/Pedal Position Sensor/Switch 'D' Circuit being too high. Common causes include Faulty Throttle/Pedal Position Sensor/Switch, Wiring or connector issues in the sensor circuit, Corrosion or damage to sensor terminals. 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
- P2123 Mercury indicates Throttle/Pedal Position Sensor/Switch 'D' Circuit High.
- Common causes
- Common causes include Faulty Throttle/Pedal Position Sensor/Switch, Wiring or connector issues in the sensor circuit, Corrosion or damage to sensor terminals.
- 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 P2123 Mercury Description
The P2123 diagnostic trouble code for Mercury vehicles indicates an issue with the Throttle/Pedal Position Sensor/Switch 'D' Circuit being too high. This sensor is crucial for the engine control module (ECM) to accurately determine the throttle position and adjust the fuel and air mixture accordingly. When the sensor reports a high voltage signal, it can lead to improper fuel delivery, affecting the engine's performance and efficiency. This can result in poor acceleration, rough idling, and even stalling of the vehicle. If left unaddressed, it can potentially cause further damage to the engine and other related components.
Common Causes of P2123 Mercury
- Faulty Throttle/Pedal Position Sensor/Switch
- Wiring or connector issues in the sensor circuit
- Corrosion or damage to sensor terminals
- ECM malfunction or software glitch
Symptoms of P2123 Mercury
- Rough idling or stalling
- Lack of power or sluggish acceleration
- Engine surging or hesitation
- Check Engine Light illuminated on the dashboard
How to Fix P2123 Mercury
- Start by diagnosing the issue with a scan tool to confirm the P2123 code.
- Inspect the wiring harness and connectors for any damage, corrosion, or loose connections.
- Test the Throttle/Pedal Position Sensor/Switch for proper voltage output.
- Replace the sensor if it fails the voltage test or shows signs of damage.
- Clear the error code and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P2123 Mercury
The cost of repairing a P2123 code on a Mercury vehicle can vary depending on the specific model and year. On average, the replacement of a Throttle/Pedal Position Sensor/Switch can range from $100 to $200, with additional costs for labor that can amount to $100 to $200. Overall, the total repair cost can be around $200 to $400. It's important to note that labor rates and part prices can differ based on location and the repair shop chosen. It's recommended to get quotes from different shops to find the best deal.
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