Camshaft Position Sensor 'B' Range/Performance Problem (Bank 2)

The engine control module (ECM) uses the camshaft position sensor to know when to inject fuel and fire the spark plugs. If there's a problem with this sensor, it can cause timing issues, affecting engine performance.

The ECM expects to see a regular signal pattern from the camshaft position sensor, alternating between 0.5 volts (low) and 4.5 volts (high) at specific intervals during engine operation, usually around 1-2 milliseconds apart, depending on engine speed.

Don't just throw parts at it. Walk through these in order — each step tells you whether to keep going or stop and fix what you found.

1. 11. Inspect the wiring and connector for the camshaft position sensor on bank 2. Look for frays, breaks, or corrosion. If found, repair/replace as necessary.
2. 22. Check the camshaft position sensor itself with a multimeter. Unplug it and measure resistance; it should typically be between 200-800 ohms. If out of range, replace the sensor.
3. 33. With the engine running, use a scan tool to monitor the camshaft position sensor signal. It should show a voltage signal oscillating as expected. If the signal is erratic, replace the sensor or fix wiring issues.
4. 44. Confirm timing to ensure that the camshaft alignment is correct. A timing chain/belt that has slipped can cause this code to appear. If there are issues, repair the timing.
5. 55. If all previous checks are okay, consider testing the ECM for faults, as the issue could be internal to the control module.

• Faulty camshaft position sensor
• Wiring damage or corrosion
• Poor connector connection
• Timing chain/belt issues
• Oil contamination or debris harming the sensor

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