Is it safe to drive with this code?

Driving with P0366 is typically possible in the short term, as many vehicles enter a limp-home mode to protect the engine, but performance may be noticeably reduced with rough running and poor fuel economy. Prolonged driving may lead to misfires that can damage the catalytic converter or cause internal engine wear, so arranging a prompt inspection is advisable—see our site disclaimer for guidance.

P0366 may affect your MOT outcome if the malfunction indicator lamp (check engine light) is illuminated at the time of the test, as an active warning light can be recorded as a failure. What matters is the state of the MIL during the inspection—see our disclaimer section for full MOT-related information.

Roughly how much does it cost to fix?

Repair costs vary widely depending on the underlying cause. A camshaft position sensor replacement is often low three-figure (approximately £100–300 for parts and labour combined), whilst wiring repairs may fall into the low two-figure to low three-figure range. If timing chain, belt, or cam phaser work is required, costs can reach the high three-figure to four-figure range, with pricing influenced by whether you use an independent garage or a main dealer.

Can this code appear even if the sensor is new?

Yes, P0366 can persist or reappear after sensor replacement if the root cause lies elsewhere, such as damaged wiring, a worn timing chain, a faulty reluctor wheel, oil contamination, or even ECM software issues. Thorough diagnostics are essential to avoid unnecessary part replacements.

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← All fault codes | Timing

P0366

Powertrain

Camshaft Position Sensor "B" Circuit Range/Performance (Bank 1)

The engine control module has detected that the signal from camshaft position sensor B on bank 1 is outside the expected range or performance parameters, which may affect engine timing coordination.

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ⓘ Information only. This page provides general educational information about fault code P0366. We do not assess the urgency or safety implications of any specific fault. That requires in-person diagnosis by a qualified mechanic. Full terms.

Recommended next steps

Whether a fault is urgent, drivable, or routine depends entirely on the cause on a specific vehicle, and that can only be determined by a qualified mechanic with diagnostic equipment. If a warning light is illuminated, the most reliable next step is professional diagnosis.

What does P0366 mean?

P0366 is a Powertrain (engine, transmission, fuel system) fault code. It indicates: Camshaft Position Sensor "B" Circuit Range/Performance (Bank 1).

This is a standardised OBD-II code. The technical definition is the same regardless of the make or model of vehicle, although specific causes and symptoms can vary between vehicles.

About Timing codes

Timing codes relate to the variable valve timing (VVT) system, cam position, crank position, or the correlation between them. On engines prone to timing chain stretch (BMW N47, Ford EcoBoost, VAG TFSI), these codes often signal a stretched chain rather than a sensor fault.

P0366 is one of 160 codes in this category. Browse all Timing codes →

What we know about P0366 specifically

We record the SAE J2012 standardised definition and the system this code belongs to, but we have not yet published detailed driver-reported symptoms, common causes, or step-by-step diagnostic guidance for P0366.

Rather than invent that information by generating generic content from a template, we leave it out. For specific guidance, the most reliable sources are:

•your vehicle's own service manual or manufacturer-specific technical bulletins
•a qualified mechanic with a manufacturer-level diagnostic tool
•a marque specialist familiar with your make and model

Codes nearby

Codes adjacent to P0366 in the P-code series. Many fault codes appear together with their neighbours because they relate to the same circuit or component.

P0362 Ignition Coil"L" Primary/Secondary Circuit

P0363 Misfire Detected - Fueling Disabled

P0365 Camshaft Position Sensor "B" Circuit (Bank 1)

P0367 Camshaft Position Sensor "B" Circuit Low Input (Bank 1)

P0368 Camshaft Position Sensor "B" Circuit High Input (Bank 1)

P0369 Camshaft Position Sensor "B" Circuit Intermittent (Bank 1)

Other Timing codes

Other fault codes in the same system as P0366. The ones with detailed guides have plain-English explanations, symptoms, causes, and diagnostic steps.

P0010

"A" Camshaft Position Actuator Circuit (Bank 1) Detailed guide

P0011

"A" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1) Detailed guide

P0012

"A" Camshaft Position - Timing Over-Retarded (Bank 1) Detailed guide

P0014

"B" Camshaft Position - Timing Over-Advanced or System Performance (Bank 1) Detailed guide

P0016

Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A) Detailed guide

P0017

Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B) Detailed guide

Spotted an issue or have something to add? Mechanics, technicians, and drivers who have first-hand experience with P0366 can submit a correction or expansion. We review every submission before publishing, mechanic submissions are prioritised.

Information only, not professional advice

The information on this page is provided for general guidance and educational purposes only. It is not a substitute for diagnosis or repair advice from a qualified mechanic. Always verify any fault before paying for repairs. carfaultcodes.co.uk accepts no liability for decisions made based on this information. Full terms →

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