P0021 on Volkswagen: Causes, Symptoms and Fix Cost

P0021 means the intake camshaft on bank 2 is positioned more advanced than the ECU commanded it to be. The variable valve timing system on bank 2 is not responding correctly, typically due to oil flow issues, a faulty bank 2 VVT solenoid, a stretched timing chain, or a worn cam phaser. The code only appears on V6, V8, V10, and V12 engines.

Beyond the generic causes listed on the main P0021 page, these are the Volkswagen-specific patterns we see most often:

Follow these steps to pinpoint the root cause of P0021:

1. Check engine oil level and condition. Low, dirty, or wrong-viscosity oil is the most common cause of P0021. Use only the manufacturer-specified oil approval and change if overdue
2. Use a scan tool to monitor live cam phasing data on bank 2. Compare the actual versus commanded intake cam advance angle. Deviations over 5 to 10 degrees confirm a real timing fault
3. Locate the bank 2 intake VVT solenoid (typically on the bank 2 valve cover or front of the bank 2 cylinder head). Measure resistance (6 to 13 ohms typical) and inspect the mesh filter screen for sludge
4. Listen for cold-start rattle from the bank 2 side of the engine. A timing chain rattle on bank 2 specifically points to chain or tensioner wear on that bank
5. If the oil and solenoid are good, suspect timing chain or guide wear. A workshop will need to remove the bank 2 valve cover for inspection, or check timing chain wear with a service tool

Estimated repair costs on a Volkswagen (Volkswagen parts and labour typically run 50% above the average for this code).

These codes commonly cluster with P0021 on Volkswagen vehicles: