Camshaft Position Sensor B Circuit Range/Performance (Bank 2)
The camshaft position sensor on Bank 2 is sending signals outside its normal operating range, like a metronome that's ticking at the wrong tempo. The engine computer can't properly synchronize fuel injection and ignition timing with the valve movements.
The ECM monitors the camshaft position sensor's voltage signal and its frequency/timing relative to the crankshaft. It expects a clean, synchronized square-wave signal within specific voltage and frequency ranges. When the signal drifts outside these parameters or shows erratic timing, the fault is triggered.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Sensor voltage signal | 0.5-4.5V with clean transitions | Below 0.2V or above 4.8V; noise or dropout |
| Camshaft timing correlation | Within 5° of expected crankshaft position | Deviation exceeds 5-10° or signal loss detected |
Code P0366 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0366 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.