The Quick Answer above is the generic definition. What follows is the model-specific detail for the Volkswagen models that log P0021.
DTC/P0021·Volkswagen
P0021 on Volkswagen: Causes, Symptoms and Fix Cost
Quick Answer
Moderate SeveritySafe to drive (short-term)Volkswagen
P0021 on a Volkswagen 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. VW, Audi, Skoda and SEAT apps often show this code as P002100; the last two digits are a failure-type byte.
Typical repair cost, all makes€60 - €6000
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Volkswagen Touareg
2005-2024The Touareg 3.0 TFSI EA837 V6 and 3.0 TDI V6 are the typical P0021 candidates. On the 3.0 TDI (CASA, CASB) bank 2 timing chain stretch is well documented. On the 3.0 TFSI, the bank 2 intake adjuster failure pattern matches the Audi A6. Plan for 3000 EUR or more for full chain work at a VAG specialist.
What causes P0021 on a Volkswagen?
Beyond the generic causes listed on the main P0021 page, these are the patterns noted for Volkswagen models:
Volkswagen Touareg3.0 TDI V6 bank 2 chain stretch (CASA/CASB)
Volkswagen Touareg3.0 TFSI bank 2 intake adjuster failure
How to diagnose P0021 on a Volkswagen with OBD2
Follow these steps to pinpoint the root cause of P0021:
- 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
- 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
- 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
- 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
- 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
How much does P0021 cost to fix on a Volkswagen? (EUR)
Estimated repair costs for P0021 in EUR, compiled across makes. Expect Volkswagen parts and labour towards the upper end of each range.
Prices estimated as of March 2026. Costs vary by region, vehicle, and shop.
Codes related to P0021
These codes are often seen alongside P0021 or point to related issues, on any make:
Looking for the full P0021 reference (all makes, full diagnosis flow, complete repair cost matrix)?
See the main P0021 guideSkanyx · Volkswagen
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