P2128 Mercury Code - Throttle/Pedal Position Sensor/Switch 'E' Circuit High
Quick Answer
The P2128 diagnostic trouble code for Mercury vehicles indicates an issue with the Throttle/Pedal Position Sensor/Switch 'E' Circuit being too high. Common causes include Faulty throttle position sensor, Faulty pedal position sensor 'E', Wiring issues or poor electrical connections. 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
- P2128 Mercury indicates Throttle/Pedal Position Sensor/Switch 'E' Circuit High.
- Common causes
- Common causes include Faulty throttle position sensor, Faulty pedal position sensor 'E', Wiring issues or poor electrical connections.
- 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 P2128 Mercury Description
The P2128 diagnostic trouble code for Mercury vehicles indicates an issue with the Throttle/Pedal Position Sensor/Switch 'E' Circuit being too high. In simpler terms, this means that the electronic control module (ECM) has detected a higher voltage signal than expected from the throttle position sensor or pedal position sensor 'E'. These sensors are crucial components that provide input to the ECM to determine how much air and fuel to deliver to the engine, affecting performance and efficiency.
Common Causes of P2128 Mercury
- Faulty throttle position sensor
- Faulty pedal position sensor 'E'
- Wiring issues or poor electrical connections
- ECM malfunction or software glitch
- Water or corrosion damage to sensor components
Symptoms of P2128 Mercury
- Reduced engine performance or power
- Difficulty accelerating or maintaining speed
- Rough idling or stalling
- Check Engine Light illuminated on the dashboard
- Vehicle going into "limp mode" to protect the engine
How to Fix P2128 Mercury
- Begin by using an OBD-II scanner to read and document the fault codes, including P2128.
- Inspect the wiring harness and connectors for any signs of damage, corrosion, or loose connections. Repair or replace as needed.
- Test the throttle and pedal position sensors using a multimeter to verify proper voltage signals. Replace any sensors that are out of specification.
- Clear the fault codes from the ECM using the OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.
- If the problem persists, consult a professional mechanic for further diagnosis and potential ECM reprogramming or replacement.
Cost to Fix P2128 Mercury
The cost of repairing a P2128 code for a Mercury vehicle can vary depending on the specific cause of the issue and the labor rates in your area. In general, replacing a throttle or pedal position sensor can cost between $100 and $200 each, including parts and labor. Wiring repairs or ECM diagnostics may incur additional costs.
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