P0015 on BMW
Exhaust Camshaft Position Timing - Over-Retarded (Bank 1)
P0015 on BMW vehicles indicates exhaust camshaft position timing - over-retarded (bank 1). Au7o has documented this code across 5 BMW models — most commonly on 3 Series, 4 Series, M5. This code means the exhaust camshaft on Bank 1 is timed more retarded (later) than the computer commanded. Engines with variable valve timing use a cam phaser, controlled by oil pressure and a solenoid, to advance or retard camshaft position for better power, economy, and emissions. When the computer commands a position but the actual exhaust cam stays too far retarded, it sets P0015. This usually points to an oil-flow or phaser problem and can cause rough idle, reduced power, and poor fuel economy. Typical repair costs on BMW range from $100 to $32,000, depending on the specific model and root cause.
Common Causes of P0015
- •Low or dirty engine oil restricting phaser operation
- •Stuck or clogged variable valve timing (oil control) solenoid
- •Failed exhaust camshaft phaser/actuator
- •Clogged oil control valve screen or oil passages
- •Stretched or worn timing chain
- •Wiring or connector fault at the VVT solenoid
- •Incorrect cam timing from prior service
- •Faulty PCM/ECM (rare)
P0015 on BMW by Model
BMW 3 Series(1 issue)
- VANOS Solenoid/System Issues2012-2018
The VANOS (Variable Valve Timing) system can develop issues including solenoid failures, oil delivery problems, and timing errors. This affects engine performance and can cause rough running. Regular oil changes are critical for VANOS health.
BMW 4 Series(1 issue)
- N20 Timing Chain Guide Failure (428i)2014-2016
The 428i models equipped with the N20 four-cylinder turbo engine suffer from the same timing chain guide failure as other N20-powered BMWs. The plastic chain guides crack and disintegrate, allowing chain slack that leads to timing correlation faults and potential engine damage. The 2014-2015 model years are most affected, with BMW implementing updated guides in later 2015 production.
BMW M5(1 issue)
- VANOS High-Pressure Pump & Line Failure (CATASTROPHIC) - E60 M52006-2010
The S85 engine uses high-pressure VANOS (Variable Valve Timing) pump to supply necessary hydraulic pressure. The high-pressure VANOS lines were improperly routed without adequate bends to attach to VANOS pump, causing premature line failure and oil leaks. When VANOS line fails and leaks, it can starve VANOS pump of pressure, causing pump failure and sending metal debris throughout engine. This can escalate to CATASTROPHIC engine damage requiring complete engine replacement ($32,000). BMW settled class action lawsuit regarding VANOS failures and agreed to cover repairs for owners who reported issues before settlement cutoff date. M5Board warns: DO NOT ignore VANOS line leaks - this can destroy entire engine within weeks.
BMW X5 M(1 issue)
- S63 VANOS Solenoid Failure - E70/F85/F95 X5 M2010-2023
The S63 4.4L twin-turbo V8 in all generations of X5 M requires four VANOS (Variable Valve Timing) solenoids to control variable camshaft timing on both intake and exhaust cams of both cylinder banks. These solenoids fail through coil malfunction, sticking from oil varnish, and O-ring deterioration, typically between 80,000-120,000 miles. When VANOS solenoids fail, the engine loses ability to optimize valve timing, causing rough idle, power loss, poor fuel economy, and check engine lights. The S63 uses VANOS solenoid part number 11368605123 (Pierburg OEM, N63/S63 compatible) or Genuine BMW 11368482268 for newer S63TU applications. Unlike the S85's catastrophic VANOS pump failure, S63 VANOS solenoid failure is annoying but not engine-threatening - and relatively inexpensive to fix.
BMW Z4(1 issue)
- VANOS Solenoid & System Failure - E85/E89 Z4 (All Engines)2003-2016
The VANOS (Variable Valve Timing) system on all E85 and E89 Z4 engines (M54, N52, N54, N20) suffers from solenoid failures, typically beyond 100,000 miles. The VANOS solenoids control oil flow to the variable camshaft timing adjustment units, and they fail through three primary modes: solenoid coil pack malfunction, sticking solenoid valves from oil varnish buildup, and deteriorating solenoid sealing plate rubber rings. When VANOS solenoids fail, the engine loses its ability to optimize valve timing, causing rough idle, power loss, poor fuel economy, and unusual engine noises. Z4-forum.com documents this as an extremely common issue across all E85 and E89 models. The good news: VANOS solenoids are inexpensive and relatively easy to replace - one of the simpler E85/E89 repairs.
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View P0015 across all makes →Frequently Asked Questions
What does P0015 mean on BMW?▼
P0015 stands for "Exhaust Camshaft Position Timing - Over-Retarded (Bank 1)." This code means the exhaust camshaft on Bank 1 is timed more retarded (later) than the computer commanded. Engines with variable valve timing use a cam phaser, controlled by oil pressure and a solenoid, to advance or retard camshaft position for better power, economy, and emissions. When the computer commands a position but the actual exhaust cam stays too far retarded, it sets P0015. This usually points to an oil-flow or phaser problem and can cause rough idle, reduced power, and poor fuel economy. On BMW specifically, this code is documented across 5 models.
What causes P0015 on BMW vehicles?▼
Common causes on BMW: Low or dirty engine oil restricting phaser operation, Stuck or clogged variable valve timing (oil control) solenoid, Failed exhaust camshaft phaser/actuator, Clogged oil control valve screen or oil passages, Stretched or worn timing chain. Specific causes vary by model and year — see the per-model sections below.
How much does it cost to fix P0015 on a BMW?▼
Repair costs on BMW range from $100 to $32,000, depending on the specific model and root cause.
Which BMW models have P0015 documented?▼
Au7o has documented P0015 on 5 BMW models: 3 Series, 4 Series, M5, X5 M, Z4.