What does code P0304 mean on a Land Rover and is it safe to drive?
P0304: Cylinder 4 Misfire Detected. Here's what it means on your Land Rover, what usually causes it, what repairs typically cost, and how safe it is to keep driving.
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What this code means
Misfire confirmed on cylinder 4. On 4-cylinder engines, this is the last cylinder—check coil and plug first, then injector, then compression.
Common causes for your Land Rover
- Worn spark plug on cylinder 4
- Failed ignition coil on cylinder 4
- Faulty or clogged fuel injector
- Low compression or valve issue
Symptoms
- Check Engine Light
- Rough idle and shaking
- Poor acceleration or power loss
Typical fixes
- Replace spark plug and COP coil on cylinder 4
- Clean or replace fuel injector
- Compression and leak-down test if basic parts check out
Repair cost range
For a Land Rover, repairs for P0304 often fall between $150 and $900, depending on the cause and whether you use OEM or aftermarket parts. Labor rates vary by location.
Known issues on Land Rover
Land Rover cylinder 4 misfire on V6 models is on bank 2. Multiple bank 2 misfires together suggest a bank 2 fuel delivery issue or a boost leak affecting one bank on the 3.0L supercharged V6.
Most commonly affected models
Range Rover 3.0L V6 2013–2020Discovery 3.0L 2017–2023Range Rover Sport 5.0L 2010–2020