Camshaft position sensor B circuit bank 1

The signal from camshaft sensor B on bank 1 (usually the exhaust camshaft) is missing or invalid.

• longer cranking before the engine starts
• rough running or reduced power
• engine warning light
• sometimes stalling

1. 01Inspect the sensor connector for oil, corrosion and broken pins
2. 02Check the supply voltage, ground and signal (with a scope if possible)
3. 03Compare the camshaft signal with the crankshaft signal and check cam/crank deviation values
4. 04Check the trigger wheel and the mechanical timing if the sensor and wiring are fine
5. 05Replace the sensor if it is faulty