What does code P1317 mean on BMW vehicles?
The ECU detects implausible timing or position data from camshaft B relative to engine operation.
OBD-II Code BMW
P1317 — BMW — B Camshaft Position Plausibility
The ECU detects implausible timing or position data from camshaft B relative to engine operation.
Common symptoms
- Limp mode activation
- reduced engine performance
Possible causes
- Faulty CMP sensor
- VANOS system malfunction
- mechanical timing issues
Initial recommendation
Run advanced VVT diagnostics and inspect camshaft timing components.
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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