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p0012
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BMW · Sedans
Intake Camshaft Position Timing Over-Retarded Bank 1
Quick Answer
Error code P0012 on your BMW Sedans means: Intake Camshaft Position Timing Over-Retarded Bank 1. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
330i530i540i740i760i330e 2024330i xDrive 2024530i 2024530i xDrive 2024540i xDrive 2024545e xDrive 2024740i 2024740i xDrive 2024760i xDrive 2024M3 CS 2024M3 Competition 2024M3 Competition xDrive 2024M340i xDrive 2024i4 M50 2024i4 eDrive35 2024i4 eDrive40 2024M3M340ii4i5
Likely Causes
  1. Low engine oil level or degraded oil viscosity
  2. Clogged oil passages to the VANOS solenoid
  3. Faulty VANOS solenoid (intake side)
  4. Stretched or worn timing chain
  5. Failed VANOS hub or actuator gear
How to Fix It
1
Check engine oil level and condition; change oil if degraded
2
Inspect VANOS solenoid screens for debris and clean or replace
3
Test VANOS solenoid operation with BMW diagnostic software
4
Check timing chain stretch by comparing camshaft and crankshaft sensor readings
5
Replace VANOS solenoid, hub, or timing chain as indicated
Pro Tip
This issue typically requires professional diagnosis. Attempting this fix without proper training could cause further problems.
Parts You May Need
VANOS solenoid
VANOS solenoid screen
Timing chain kit
Engine oil and filter
Related Error Codes
P0171P0174P0300P0335P0340
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