P0366: Camshaft Position Sensor Circuit Range/Performance (Bank 1)
The P0366 code indicates that the Engine Control Module (ECM) has detected a signal from the camshaft position sensor on Bank 1 that is out of the expected range or performance parameters. This sensor monitors the position of the camshaft relative to the crankshaft to optimize fuel injection and ignition timing. A fault can cause drivability issues and may trigger the check engine light.
01. Most Common Causes
- Faulty camshaft position sensor
- Wiring or connector issues (shorts, opens, corrosion)
- Incorrect sensor alignment or installation
- Timing chain/belt slippage or stretched
- ECM software or hardware failure
02. Symptoms You Will Notice
- Check Engine Light illuminated
- Engine misfire or rough idle
- Hard starting or no start
- Reduced engine power or hesitation
- Poor fuel economy
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data.
Step 2: Visually inspect the camshaft position sensor and its wiring/connector for damage or corrosion.
Step 3: Test sensor resistance and voltage supply with a multimeter per manufacturer specs.
Step 4: Check for proper sensor gap and alignment; inspect timing components if necessary.
Step 5: Clear codes and test drive to see if code returns; if so, replace sensor.
04. Commonly Affected Makes
05. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive long distances as the engine may stall or run poorly, potentially causing further damage.
How much does it cost to fix?▼
Typically $50-$150 for parts and labor, but can be higher if timing components need replacement.