P0366Camshaft Position Sensor B Circuit Range/Performance Bank 1
- Generic OBD-II code · Powertrain
- Turns on the check-engine light
- Matters for the ITP
- Can trigger limp mode
- Needs a drive cycle to confirm a fix
- How the car detects it
- Camshaft position sensor B is the exhaust camshaft sensor (bank 1 = side with cylinder 1), usually a Hall sensor on the exhaust cam phaser. P0366 means its pulses arrive, but their number or position does not fit the crankshaft. GM expects 400 pulses per 100 engine cycles and sets the code outside 398–402, or with fewer than 4 or more than 6 pulses in the first 12 reference events at start, 8 of 10 samples, after two trips. On GM's 3.6-litre V6 in the Saab 9-4X the exhaust phaser then goes to its park position and ignition runs from the crankshaft alone; on the 2.8 turbo V6 (LAU) the fault must last 1 s, or 10 s cumulatively, below 2,520 rpm. Saab's workshop information names a damaged tone wheel, play, foreign matter and too large an air gap. Ford uses the code too but publishes no thresholds.
- What you may notice
- Check engine light on
- Longer cranking before the engine starts
- Loss of power or rough idle (exhaust cam timing in its base position)
- Higher fuel consumption
- Likely causes
- LikelySensor faulty or dirty (metal debris on the magnet)
- PossibleWiring close to ignition coils or solenoids, loose contact
- PossibleTone wheel on the phaser damaged or loose, air gap too large
- RareSensor or phaser wrongly fitted after timing drive work
- Inspection (ITP)
- Matters for the ITP. While the check-engine light is on, the car fails the emissions check.
- Repair
- Easy · Often possible to do yourself.Typical cost: €60 – €300
- Related codes
Explanation from obdex (CC0), exactly as the app shows it. Guidance only; confirm with a workshop.