What does code P1581 mean?

Q: What does code P1581 mean?

Electronic Throttle Monitor Malfunction. P1581 on Ford vehicles means the powertrain control module (PCM) has detected a malfunction in the electronic throttle monitor circuit, which continuously cross-checks the throttle valve position against the commanded position. The PCM compares signals from the throttle position sensors and the accelerator pedal position sensors, and when the calculated throttle angle does not match the expected value within a calibrated tolerance, it stores this code and typically illuminates the wrench or check engine light.

DTC codes / Ford codes / P1581

P1581 · FordElectronic Throttle Monitor Malfunction

P1581 on Ford vehicles means the powertrain control module (PCM) has detected a malfunction in the electronic throttle monitor circuit, which continuously cross-checks the throttle valve position against the commanded position. The PCM compares signals from the throttle position sensors and the accelerator pedal position sensors, and when the calculated throttle angle does not match the expected value within a calibrated tolerance, it stores this code and typically illuminates the wrench or check engine light.

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.