The Quick Answer above is the generic definition. What follows is the model-specific detail for the BMW models that log P0018.
DTC/P0018·BMW
P0018 on BMW: Causes, Symptoms and Fix Cost
Quick Answer
High SeverityNot safe to driveBMW
P0018 on a BMW means the crankshaft and the intake camshaft on bank 2 are not in the correct rotational relationship. Bank 2 is the cylinder bank that does not contain cylinder 1, and because an inline engine has a single cylinder head with one set of camshafts, this camshaft code only appears on engines with two cylinder heads: V engines (V6, V8, V10, V12) and flat (boxer) engines. The ECU sees the bank 2 intake cam position deviate from the commanded angle, typically because of a stretched chain, a failed VVT solenoid or low oil pressure.
Typical repair cost, all makes€60 - €6000
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BMW 3 Series
2005-2024No 3 Series has been built with a V6, and the only V8 is the S65 in the 2008-2013 M3 (E90, E92, E93), which has double VANOS: variable timing on the intake and exhaust camshafts of each bank. So a genuine P0018 on a 3 Series points to that car and to its bank 2 intake VANOS solenoid, oil supply or timing drive. The inline-six engines (N52, N54, N55) have one cylinder head with one intake and one exhaust camshaft, so their camshaft timing faults are reported as bank 1 codes, not P0018.
What causes P0018 on a BMW?
Beyond the generic causes listed on the main P0018 page, these are the patterns noted for BMW models:
BMW 3 SeriesBank 2 intake VANOS solenoid or oil supply fault on the S65 V8 (M3)
BMW 3 SeriesA misread code on an inline-six 3 Series (N52, N54, N55): these engines have no bank 2 and log camshaft timing faults as bank 1 codes
How to diagnose P0018 on a BMW with OBD2
Follow these steps to pinpoint the root cause of P0018:
- Check engine oil level and condition. V-engines are particularly sensitive to oil quality and pressure because both banks share the oil pump. Top up or change with the manufacturer-specified viscosity and clear the code
- Listen for cold-start rattle from the front of the engine. On V6 and V8 engines a stretched chain or worn tensioner makes a distinct 1 to 5 second rattle until oil pressure builds
- Monitor live cam phasing data on bank 2 with manufacturer-level software (actual and target cam angles are not part of the standard OBD2 data set; a generic reader shows the code, freeze frame and fuel trims). Compare actual versus commanded intake cam angle. Deviations over 5 to 10 degrees confirm a mechanical timing fault
- Test the bank 2 intake VVT solenoid. Resistance typically 6 to 13 ohms. Inspect the screen for debris. A clogged screen blocks oil to the phaser and triggers P0018
- If the solenoid is good and oil pressure is normal, suspect the timing chain or guide wear on bank 2. A workshop will need to remove the valve cover for inspection. On many V-engines this is bank 2 specifically, not both banks
How much does P0018 cost to fix on a BMW? (EUR)
Estimated repair costs for P0018 in EUR, compiled across makes. Expect BMW parts and labour towards the upper end of each range.
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
Codes related to P0018
These codes are often seen alongside P0018 or point to related issues, on any make:
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See the main P0018 guideSkanyx · BMW
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