P0308 on Volkswagen: How to Diagnose & Fix
Cylinder 8 Misfire Detected
1 Volkswagen model · 1 documented issue
P0308 on Volkswagen by model: symptoms, diagnosis and fix
The EA211 EVO 1.5T engine in the Taos produces a noticeable ticking/tapping noise that concerns many owners. While some of the noise is normal direct-injection fuel injector operation, excessive ticking can indicate a high-pressure fuel pump issue or hydraulic lifter wear. VW states that direct-injection engines are inherently noisier, but some units produce excessive noise beyond the norm. TSB 20-22-01 addresses abnormal engine noise diagnosis.
Common Symptoms
- Loud ticking noise from engine
- Tapping sound that increases with RPM
- Ticking most noticeable at idle and cold start
- Metallic rattle from top of engine
- Noise that changes character when engine warms up
How to Fix
Have dealer verify noise is within VW specification using sound level comparison. If excessive, check high-pressure fuel pump (HPFP) cam follower for wear (VW part# 06L-109-311). Inspect hydraulic lifters. Ensure VW 508.00/509.00 spec 0W-20 oil is being used. Some units require lifter replacement under warranty. If noise is confirmed as normal DI operation, no repair is needed.
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P0308 code reference
General diagnostic-code context. The code alone does not confirm a cause for your vehicle; use the applicable issue card and its sources.
Frequently asked questions
What does P0308 mean on a Volkswagen?
P0308 stands for "Cylinder 8 Misfire Detected." P0308 means the engine computer detected a misfire on cylinder number 8 — that cylinder is failing to combust properly or at the correct time. The PCM identifies it by monitoring crankshaft speed variations as cylinder 8 fires. Misfires waste fuel, increase emissions, and can overheat and damage the catalytic converter, so a hard misfire may cause a flashing check engine light. Typical symptoms include rough idle, vibration, hesitation, and reduced power. On Volkswagen it is documented across 1 model: Taos.
What are the most common causes of P0308?
The most common causes of P0308 are: Worn, fouled, or incorrectly gapped spark plug on cylinder 8, Failed ignition coil or coil-on-plug for cylinder 8, Faulty, clogged, or leaking fuel injector, Vacuum or intake air leak affecting that cylinder, Low compression (worn rings, burnt/leaking valve, head gasket), Damaged spark plug wire or boot (on applicable engines), Carbon buildup or sticking valve. The specific cause varies by vehicle.
How much does it cost to fix P0308 on a Volkswagen?
Repair costs vary widely with the root cause and Volkswagen model; each issue on this page carries its own estimate where one is published.
Looking for P0308 on a different make?
View P0308 across all makes →Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.