P0307 – OBD-II DTC

OBD-II DTC P0307 – Cylinder 6 Misfire Detected

DTC P0307 meaning

DTC P0307 indicates that the Engine Control Module (ECM) has detected a misfire in cylinder 6 of the engine. A misfire occurs when the air-fuel mixture in the cylinder fails to ignite properly, leading to a loss of power and increased emissions. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors the performance of the engine and its components.

DTC P0307 symptoms

Common symptoms associated with DTC P0307 may include:

• Rough idling or engine shaking
• Decreased engine power and acceleration
• Increased fuel consumption
• Illuminated Check Engine Light (CEL)
• Engine stalling or hesitation during acceleration

DTC P0307 causes

Several factors can lead to the triggering of DTC P0307, including:

• Faulty spark plug or ignition coil in cylinder 6
• Fuel delivery issues, such as a clogged fuel injector
• Vacuum leaks affecting the air-fuel mixture
• Compression problems in cylinder 6
• Faulty engine control module (ECM)

DTC P0307 seriousness

DTC P0307 is considered a serious issue as it can lead to further engine damage if not addressed. Continuous misfiring can cause:

• Increased wear on engine components
• Damage to the catalytic converter
• Reduced fuel efficiency
• Potential for engine overheating

How to diagnose DTC P0307

To diagnose DTC P0307, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the P0307 code.
2. Inspect the spark plug and ignition coil for cylinder 6.
3. Check for any vacuum leaks around the intake manifold.
4. Test the fuel injector for proper operation.
5. Perform a compression test on cylinder 6 to assess engine health.

How to fix DTC P0307 step-by-step instructions

To fix DTC P0307, follow these steps:

1. Replace the spark plug in cylinder 6 if it is worn or damaged.
2. Replace the ignition coil for cylinder 6 if it is faulty.
3. Clean or replace the fuel injector for cylinder 6 if it is clogged.
4. Repair any vacuum leaks found during inspection.
5. Address any compression issues if the compression test indicates a problem.
6. Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.

How to erase DTC P0307

To erase DTC P0307, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the codes.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.

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