how to address P0021 timing issue in Volkswagen Golf Seventh Generation (2013-2020)

Learn how to diagnose and fix P0021 camshaft timing issue in Volkswagen Golf 7 (2013-2020). Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the vehicle's battery to ensure safety during repairs.
• Allow the engine to cool before starting work.

2. Change Engine Oil

• Drain the old engine oil completely using an oil drain pan.
• Replace the oil filter with a new one, ensuring it is compatible with the vehicle.
• Refill with manufacturer-recommended engine oil, ensuring the oil level is correct.

3. Replace VVT Solenoid

• Locate the VVT solenoid, typically found on the cylinder head.
• Remove the electrical connector and the mounting bolts securing the solenoid.
• Install the new VVT solenoid by reversing the removal steps, ensuring a tight fit.
• Torque specifications for the solenoid bolts should match manufacturer specifications (typically around 8-10 Nm).

4. Inspect and Adjust Timing

• Remove the engine cover to access the timing chain/belt.
• Use a timing tool to align the camshaft and crankshaft according to the timing marks.
• If misaligned, adjust the timing by loosening the camshaft sprocket bolts and repositioning the sprocket, then retightening to the specified torque (usually around 20-25 Nm).

5. Reassemble and Test

• Reinstall any components removed during the procedure.
• Reconnect the battery.
• Start the engine and allow it to reach operating temperature.