P0301 on a Volkswagen: Causes, Fixes & Repair Cost

🟠 Moderate severity · drivable

If the check engine light is flashing, stop driving — a severe misfire can damage the catalytic converter. A steady light is usually safe for a short drive to a shop.

What P0301 means on a Volkswagen

On a Volkswagen, P0301 means the engine computer has detected that cylinder 1 is not firing properly and is failing to contribute its share of power. Because the code names one cylinder, the fault is usually specific to cylinder 1, such as its spark plug, ignition coil, or fuel injector.

Is P0301 common on Volkswagens?

P0301 is common on VW's 2.0T engines in the Golf, Jetta, and Tiguan, where ignition coils are known to fail and are often replaced as a set. Spark plugs and carbon buildup on direct-injection intake valves are other frequent causes. Coil failures tend to repeat, so many owners replace all four coils at once.

Commonly reported on: Golf, Jetta, Tiguan, Passat.

Symptoms

Check engine light on (flashing if severe)
Rough idle or shaking at a stop
Loss of power or hesitation under acceleration
Poor fuel economy

Common causes

most common: Failing ignition coil for cylinder 1
common: Worn spark plug in cylinder 1
common: Clogged or leaking fuel injector in cylinder 1
less common: Carbon buildup on intake valves on direct-injection engines
less common: Low compression in cylinder 1 from engine wear

How to fix it

Fix	DIY?	Typical cost
Replace the ignition coil for cylinder 1	Yes	$100–300
Replace the spark plug in cylinder 1	Yes	$40–150
Clean or replace the fuel injector in cylinder 1	Mechanic	$200–700
Have a shop clean intake valve carbon buildup	Mechanic	$400–900