What does code P1531 mean?

Q: What does code P1531 mean?

Invalid Test Accelerator Pedal Movement. P1531 on Ford vehicles means the powertrain control module (PCM) ran its accelerator pedal rationality test and did not see the expected change in the pedal position signal when the throttle was moved during the test. The PCM compares the two or three redundant accelerator pedal position (APP) sensor tracks against each other and against expected values, and it flags this code when the movement it commanded or observed does not match what the sensors reported.

DTC codes / Ford codes / P1531

P1531 · FordInvalid Test Accelerator Pedal Movement

P1531 on Ford vehicles means the powertrain control module (PCM) ran its accelerator pedal rationality test and did not see the expected change in the pedal position signal when the throttle was moved during the test. The PCM compares the two or three redundant accelerator pedal position (APP) sensor tracks against each other and against expected values, and it flags this code when the movement it commanded or observed does not match what the sensors reported.

SystemPowertrain

Code typeFord specific

SeverityMedium

Fix difficultyIntermediate

AreaVehicle speed, idle control and auxiliary inputs

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