P0310 – OBD-II DTC

OBD-II DTC P0310 – Cylinder 9 Misfire Detected

DTC P0310 meaning

DTC P0310 indicates that the Engine Control Module (ECM) has detected a misfire in cylinder 9 of the engine. This diagnostic trouble code (DTC) is part of the On-Board Diagnostics II (OBD-II) system, which monitors the performance of the engine and its components. A misfire occurs when the air-fuel mixture in the cylinder fails to ignite properly, leading to a loss of power and increased emissions.

DTC P0310 symptoms

Common symptoms associated with DTC P0310 may include:

• Rough engine idle
• Decreased engine performance
• Increased fuel consumption
• Engine stalling
• Check Engine Light (CEL) illuminated

DTC P0310 causes

Several factors can lead to the triggering of DTC P0310, including:

• Faulty spark plug or ignition coil in cylinder 9
• Fuel delivery issues, such as a clogged fuel injector
• Vacuum leaks affecting the air-fuel mixture
• Compression problems in cylinder 9
• Faulty engine control module (ECM)

DTC P0310 seriousness

DTC P0310 can be serious as it indicates a misfire in the engine, which can lead to:

• Increased emissions and potential failure of emissions tests
• Damage to the catalytic converter due to unburned fuel
• Reduced engine performance and drivability issues
• Potential engine damage if not addressed promptly

How to diagnose DTC P0310

To diagnose DTC P0310, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC P0310.
2. Inspect the spark plug and ignition coil for cylinder 9.
3. Check for fuel delivery issues, including fuel injector operation.
4. Examine vacuum lines for leaks that could affect the air-fuel mixture.
5. Perform a compression test on cylinder 9 to assess its health.
6. Review the ECM for any additional trouble codes that may provide more context.

How to fix DTC P0310 step-by-step instructions

To fix DTC P0310, follow these step-by-step instructions:

1. Replace the spark plug and ignition coil for cylinder 9 if they are faulty.
2. Clean or replace the fuel injector for cylinder 9 if it is clogged.
3. Repair any vacuum leaks found during the inspection.
4. Address any compression issues identified in cylinder 9.
5. Clear the DTC using an OBD-II scanner and test drive the vehicle.
6. Re-scan the vehicle to ensure that the DTC does not return.

How to erase DTC P0310

To erase DTC P0310, 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 trouble codes.
5. Disconnect the scanner and start the engine to verify that the code does not reappear.