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DTC codes / Ford codes / P1215

P1215 · FordPedal Position Sensor C Circuit Low Input

P1215 on a Ford means the powertrain control module (PCM) has detected a low input voltage on the circuit for pedal position sensor C, which is part of the accelerator pedal assembly. The PCM expects a specific voltage range from this sensor as the pedal moves, and a sustained low reading tells it the circuit is shorted to ground or the sensor signal has dropped out.

SystemPowertrain
Code typeFord specific
SeverityMedium
Fix difficultyIntermediate
AreaFuel and air metering (injector circuits)

Symptoms you may notice

  • The check engine light or wrench light illuminates on the dashboard
  • The engine may enter limp mode or reduced power mode with limited throttle response
  • The accelerator pedal may feel unresponsive or the engine may idle erratically
  • Often no symptoms besides the warning light, especially if the fault is intermittent
  • Poor fuel economy or delayed acceleration in some cases
  • The transmission may shift harshly or hold gears longer than normal

Common causes, most likely first

  1. A faulty accelerator pedal position sensor C inside the pedal assembly
  2. A short to ground in the sensor C signal wire or connector
  3. Corroded, loose, or damaged electrical connector at the pedal assembly
  4. A chafed or broken wire in the harness between the pedal and the PCM
  5. A failed or failing PCM, though this is rare
  6. Water intrusion or debris in the pedal connector causing a low signal

How to diagnose and fix it

  1. Use a scan tool to read live pedal position sensor voltages and confirm sensor C is reading low across the pedal sweep
  2. Visually inspect the pedal assembly connector and wiring for corrosion, damage, or loose pins
  3. Disconnect the sensor and check the signal wire for a short to ground with a multimeter
  4. Check the reference voltage and ground at the sensor connector to rule out a supply issue
  5. If the wiring and connector are good, replace the accelerator pedal assembly with the integrated sensor
  6. Clear the code and perform a pedal relearn or idle relearn procedure if required by the vehicle
  7. Road test the vehicle to verify the code does not return and throttle response is normal

Don't replace the pedal before checking this

  • A low input on sensor C often comes from a chafed signal wire rubbing against a metal bracket near the pedal, not from the sensor itself, so a thorough wiggle test of the harness is essential.
  • Ford accelerator pedal assemblies contain multiple sensors, and a failure in one sensor can set a code for another sensor circuit because the PCM cross-checks their readings, so always verify which sensor is actually reporting low.
  • Water or spilled drinks can pool in the pedal connector and cause a low signal that temporarily clears after drying, leading to intermittent codes that are hard to reproduce.
  • A weak or failing battery or charging system can cause voltage drops that mimic a sensor fault, so check battery voltage and grounds before condemning the pedal assembly.
  • After replacing the pedal assembly, some Ford models require a relearn procedure with a scan tool, and skipping it can leave the vehicle in limp mode even with good parts.

Can I keep driving with P1215?

You can usually drive the vehicle to a repair shop, but expect reduced power and poor throttle response, so avoid highways and heavy traffic. If the vehicle enters limp mode or the pedal becomes unresponsive, stop driving and have it towed.

Tools that help

Tools we recommend are in the Auto Veteran shop on Amazon. As an Amazon Associate we earn from qualifying purchases.

Guidance is general and written for Ford vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.

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