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DTC codes / Ford codes / P1575

P1575 · FordPedal Position Out of Self Test Range

P1575 on Ford vehicles means the powertrain control module (PCM) detected that the accelerator pedal position (APP) sensor signal was outside the acceptable range during its key-on self-test. The PCM expects the pedal to be at rest during this test, so a voltage outside the calibrated window triggers the code and often forces the engine into a reduced-power limp mode.

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

Symptoms you may notice

  • The wrench or check engine light illuminates, and the message center may display 'Reduced Power' or 'Check Electronic Throttle Control'.
  • The engine may idle poorly, hesitate, or refuse to rev past a limited RPM.
  • The accelerator pedal may feel unresponsive or require more travel than normal to accelerate.
  • The vehicle may enter limp mode and limit speed to a low threshold.
  • Often no symptoms besides the warning light if the fault is intermittent or only occurs during the self-test.
  • In some cases the engine may stall or fail to start after the self-test fails.

Common causes, most likely first

  1. A dirty or sticking accelerator pedal assembly causing the APP sensor to rest outside its expected self-test voltage window.
  2. A faulty accelerator pedal position sensor (APP sensor) with worn tracks or internal failure.
  3. Damaged, chafed, or corroded wiring in the APP sensor circuit, especially at the pedal connector or along the harness.
  4. A poor electrical connection at the APP sensor connector or the PCM connector.
  5. A misadjusted or improperly installed accelerator pedal assembly after prior service.
  6. A faulty PCM, though this is rare and should be considered only after all other causes are ruled out.

How to diagnose and fix it

  1. Connect a scan tool and record the APP sensor voltage readings at key-on with the pedal released; compare them to Ford's specification for your model.
  2. Inspect the accelerator pedal assembly for binding, debris, or a floor mat interfering with its rest position, and clean or replace the pedal if it does not return freely.
  3. Visually inspect the APP sensor connector and wiring for corrosion, chafing, or loose pins, and repair any damage found.
  4. Perform a wiggle test on the APP sensor harness while watching live data to catch intermittent faults.
  5. If voltages are out of range at the sensor, replace the accelerator pedal assembly (which includes the APP sensor on most Ford models).
  6. Clear the code and perform a key-on self-test to confirm the pedal rests within the acceptable range and the code does not return.
  7. If the code persists after sensor and wiring repairs, check PCM connector integrity and, as a last resort, diagnose the PCM.

Why a clean pedal often fixes P1575

  • A floor mat or debris that prevents the pedal from fully returning to rest is a surprisingly common cause of this code on Ford vehicles.
  • The self-test only runs at key-on, so an intermittent APP sensor can pass the test most of the time and set the code only under specific conditions like cold weather or after the pedal has been held.
  • Technicians sometimes replace the throttle body when the real problem is the pedal sensor, because both can cause limp mode; always check APP sensor voltages first.
  • A weak battery or low charging voltage can cause the PCM to misread sensor voltages during the self-test, so verify battery condition before condemning the pedal.
  • On some Ford models, the APP sensor is not sold separately and the entire pedal assembly must be replaced, so confirm part availability before quoting the job.

Can I keep driving with P1575?

You can usually drive the vehicle to a repair shop, but expect reduced power and possible limp mode, so avoid highways and heavy traffic. If the engine stalls or the pedal becomes completely unresponsive, stop driving and have the vehicle 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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