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DTC codes / Ford codes / P1576

P1576 · FordPedal Position Not Available

P1576 on Ford vehicles means the powertrain control module (PCM) cannot obtain a valid pedal position signal from the accelerator pedal position (APP) sensor over the controller area network (CAN) or a dedicated circuit. The PCM sets this code when the expected pedal position message is missing, implausible, or not being broadcast by the module responsible for it, so the computer has no trustworthy driver demand input.

SystemPowertrain
Code typeFord specific
SeverityMedium
Fix difficultyIntermediate
AreaVehicle speed, idle control and auxiliary inputs

Symptoms you may notice

  • The engine may default to a limited-power or limp-home mode with reduced throttle response.
  • The accelerator pedal may feel unresponsive or the engine may idle erratically when the pedal is pressed.
  • A wrench or check engine light illuminates, and the message center may display a reduced power warning.
  • Cruise control may become inoperative because the PCM cannot confirm pedal position.
  • Often no symptoms besides the warning light if the fault is intermittent or only affects a redundant signal path.
  • The transmission may shift harshly or hold gears because pedal position is used for shift scheduling.

Common causes, most likely first

  1. Faulty accelerator pedal position (APP) sensor assembly or its internal potentiometers.
  2. Damaged, chafed, or corroded wiring between the APP sensor and the PCM, including the reference voltage and ground circuits.
  3. Loose or corroded connectors at the APP sensor or PCM, especially in damp or high-vibration environments.
  4. A PCM software calibration issue or internal PCM fault that prevents it from reading the APP signal.
  5. A communication fault on the CAN bus that prevents the pedal position message from reaching the PCM.
  6. A weak or failing battery or charging system causing low voltage that disrupts sensor signals.
  7. Aftermarket electronic throttle controllers or poor installation of accessories tapping into the pedal wiring.

How to diagnose and fix it

  1. Scan all modules for stored codes and check for communication codes that point to a CAN bus or module power issue.
  2. Inspect the APP sensor connector and wiring for corrosion, pushed pins, or chafing, and repair as needed.
  3. Measure reference voltage and ground at the APP sensor connector with the key on, engine off, and compare to factory specifications.
  4. Graph the APP sensor signal with a scan tool while slowly pressing and releasing the pedal to look for dropouts or implausible readings.
  5. Check for technical service bulletins (TSBs) or PCM calibration updates that address pedal position communication faults on the specific Ford model.
  6. If wiring and sensor signals are good, perform a wiggle test on the harness while watching live data to expose intermittent faults.
  7. Replace the APP sensor assembly only after electrical and communication checks confirm the sensor is the source, then clear codes and verify repair.

What Ford technicians check before replacing the pedal

  • A common miss is a poor ground at the PCM or APP sensor that causes the pedal signal to drop out only under load or vibration, so a static voltage check looks fine.
  • P1576 can be set by a communication fault rather than a failed pedal sensor, so always check for CAN bus codes and module power before condemning the APP assembly.
  • Aftermarket throttle controllers or alarm installations that splice into the pedal wiring frequently cause this code by corrupting the reference voltage or signal return.
  • On some Ford models the APP sensor has redundant signal tracks, and a single failed track may set P1576 with no drivability complaint until the second track fails.
  • A weak battery or failing alternator can cause low voltage that makes the APP signal implausible, so check charging system health before chasing the pedal circuit.

Can I keep driving with P1576?

If the vehicle is in reduced power mode, drive only at low speed to a safe location and arrange repair, because throttle response may be unpredictable. Avoid highway driving or towing until the fault is diagnosed and repaired.

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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