Diagnostic Overview
Meaning: Fault code P0021 indicates that your vehicle's Engine Control Module (ECM/PCM) has registered a threshold discrepancy for camshaft position a - timing over-advanced (bank 2).
Can I Drive With This Code? Yes, you can safely drive for short distances, but prompt diagnostic inspection is recommended to prevent secondary damage or reduced engine performance.
What does the P0021 code mean?
Diagnostic Trouble Code (DTC) P0021 is defined as Camshaft Position A - Timing Over-Advanced (Bank 2). This trouble code is logged when the onboard computer detects operational values outside calibrated thresholds.
When stored, the system illuminates the Check Engine Light (MIL) to alert the driver of an active fault condition.
Common Symptoms of Code P0021
Depending on vehicle model and operating conditions, symptoms may include:
- Bank 2 engine noise
- Rough idle
- Loss of power
Common Potential Causes for Code P0021
Common causes for P0021 include:
- Cause 1: Low engine oil
- Cause 2: Bad VVT solenoid Bank 2
Inspection Checklist
Recommended diagnostic procedures:
- Step 1: Check oil level
- Step 2: Inspect VVT Bank 2 plug