The P0021 trouble code is associated with the Camshaft Position, indicating that the timing is over-advanced in Bank 2. This code points to a potential issue with the camshaft’s timing or performance in the second bank. It’s typically found in vehicles with variable valve timing systems.
A Camshaft Position – Timing Over-Advanced or System Performance Bank 2
Code symptoms P0021.
1. Reduced engine performance.
2. Rough idling.
3. Decreased fuel efficiency.
4. Illuminated “Check Engine” or “Service Engine Soon” light on the dashboard.
This code is common in brands such as:: Chevrolet, Renault, Ford, Toyota, Nissan, Mercedes Benz, Honda.
Causes of the code P0021.
1. Faulty camshaft position actuator.
2. Problems with the timing chain or belt.
3. Issues with the Engine Control Module (ECM).
4. Malfunctioning camshaft or crankshaft position sensors.
Code Solutions P0021.
1. Inspect and replace the camshaft position actuator if it’s malfunctioning.
2. Examine the timing chain or belt for problems and repair as needed.
3. If ECM issues are suspected, consult a qualified technician for diagnosis and potential reprogramming or replacement.
4. Test and, if necessary, replace malfunctioning camshaft or crankshaft position sensors.