P0366 Camshaft Position Sensor B Circuit Range/Performance (Bank 1)

P0366 points to a range or performance issue in Camshaft Position Sensor B circuit on Bank 1. The signal exists, but it does not match expected camshaft position behavior.

Code details

Generic OBD-II · P0

System: Ignition / Misfire
Code type: Generic (SAE / ISO controlled)
Standard: SAE J2012 / ISO 15031-6

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not treat P0366 as a sensor-only fault until cam timing and VVT operation are checked.

Symptoms of P0366

Rough idle, shaking, or a stumble under acceleration.
A flashing check-engine light during an active misfire.
Power loss and higher fuel consumption.

Common causes of P0366

Worn spark plugs, ignition coils, or plug wires.
Fuel-delivery problems — injectors, pressure, or a lean/rich mixture.
Vacuum leaks, low compression, or a mechanical fault in that cylinder.

Useful checks before replacing parts

Compare Bank 1 cam sensor B timing, crankshaft correlation, VVT command versus actual position, oil pressure condition, and freeze-frame RPM.
Inspect sensor mounting, target wheel alignment, timing chain or belt condition, cam phaser behavior, wiring resistance, and connector fit.
Confirm whether the signal becomes implausible during startup, hot idle, acceleration, deceleration, or VVT movement.

Related OBD-II codes

These nearby ignition / misfire entries can help compare wording and pin down the fault area.