P0304 – Land Rover DTC

Land Rover DTC P0304 – Misfire Cylinder 4

DTC P0304 meaning on Land Rover

DTC P0304 indicates a misfire in cylinder 4 of the engine on a Land Rover. This means that the engine control module (ECM) has detected that cylinder 4 is not contributing as expected, causing a rough running condition.

Land Rover DTC P0304 symptoms

Symptoms of DTC P0304 on a Land Rover may include:

• Engine misfire
• Rough idle
• Lack of power
• Engine vibration
• Check Engine Light (CEL) illuminated

Land Rover DTC P0304 causes

Common causes of DTC P0304 on a Land Rover include:

• Ignition system issues (spark plug, ignition coil)
• Fuel system problems (injector, fuel pressure)
• Compression issues (low compression in cylinder 4)
• Vacuum leaks
• Engine mechanical problems

Land Rover DTC P0304 seriousness

Ignoring DTC P0304 on a Land Rover can lead to:

• Increased emissions
• Reduced fuel efficiency
• Potential damage to the catalytic converter
• Engine overheating
• Further engine damage if left unresolved

How to diagnose DTC P0304 on Land Rover

To diagnose DTC P0304 on a Land Rover, you can:

1. Check spark plugs and ignition coils
2. Inspect fuel injectors and fuel pressure
3. Perform a compression test on cylinder 4
4. Check for vacuum leaks
5. Use a scan tool to monitor live data and identify the issue

How to fix DTC P0304 on Land Rover

To fix DTC P0304 on a Land Rover, you may need to:

1. Replace faulty spark plugs or ignition coils
2. Clean or replace clogged fuel injectors
3. Address any fuel system issues
4. Repair any vacuum leaks
5. Perform necessary engine repairs based on diagnostic findings

How to erase DTC P0304 on Land Rover

After fixing the underlying issue causing DTC P0304 on a Land Rover, you can erase the code by:

1. Using an OBD-II scanner to clear the code
2. Disconnecting the vehicle’s battery for a few minutes
3. Driving the vehicle through a complete drive cycle to allow the ECM to retest

Recommended tools for Land Rover diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

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