2020 Land Rover P0300: What It Means & Is It Safe to Drive?
P0300 on the 2020 Land Rover: Random/Multiple Cylinder Misfire Detected. Here's what it means, what usually causes it, what repairs typically cost, and whether it's safe to keep driving.
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What this code means
The PCM has detected misfires across multiple cylinders. This can cause damage to the catalytic converter if driven for long.
Common causes on the 2020 Land Rover
- Worn spark plugs or ignition coils
- Clogged or bad fuel injectors
- Low compression
- Vacuum leak, bad MAF, or fuel delivery issue
Symptoms
- Check Engine Light (often flashing under load)
- Rough idle, shaking, loss of power
- Possible smell of unburned fuel
Typical fixes
- Replace spark plugs and coils as needed
- Clean or replace fuel injectors
- Fix vacuum/fuel issues
- Compression test if no obvious cause
Repair cost range
For a 2020 Land Rover, repairs for P0300 typically fall between $150 and $1200, depending on the root cause and labor rates in your area.
Known issues on Land Rover
Land Rover P0300 on the AJ133 V8 and 3.0L V6 diesel engines requires careful diagnosis. On V8 petrol models, cam timing components and coil failures are primary causes; on diesel models, injector failure or EGR fouling is more typical.
Most commonly affected models
Range Rover Sport 2006–2013LR4 2010–2016Discovery 2005–2016