What does code P1635 mean?

Q: What does code P1635 mean?

Throttle Valve Adaptation Lower Mechanical Stop Not Adapted. P1635 on BMW vehicles means the engine control module has not learned the lower mechanical stop of the throttle valve, so it cannot reliably command idle or low-load airflow. The computer detects this when the throttle adaptation routine fails to complete or the stored stop value is missing or implausible.

DTC codes / BMW codes / P1635

P1635 · BMWThrottle Valve Adaptation Lower Mechanical Stop Not Adapted

P1635 on BMW vehicles means the engine control module has not learned the lower mechanical stop of the throttle valve, so it cannot reliably command idle or low-load airflow. The computer detects this when the throttle adaptation routine fails to complete or the stored stop value is missing or implausible.

SystemPowertrain

Code typeBMW specific

SeverityMedium

Fix difficultyIntermediate

AreaComputer and output circuits

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