What does code P1634 mean on BMW vehicles?
The ECU detects a failure during the throttle valve return spring test, indicating a mechanical fault.
OBD-II Code BMW
P1634 — BMW — Throttle Valve Adaptation; Spring Test Failed
The ECU detects a failure during the throttle valve return spring test, indicating a mechanical fault.
Common symptoms
- Limp mode activation
- no throttle response
Possible causes
- Mechanical failure of throttle return spring
- internal throttle body damage
Initial recommendation
Replace throttle body assembly and perform adaptation.
Safety notice
This information is for guidance only. Brand-specific codes may vary by model, year, engine, transmission and vehicle configuration. It does not replace a physical inspection or diagnosis by a qualified mechanic. If the vehicle is unsafe to operate, avoid driving it and seek professional inspection.
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