P0273 – OBD-II DTC

OBD-II DTC P0273 – Cylinder 4 Contribution/Balance Fault

DTC P0273 meaning

DTC P0273 refers to a “Cylinder 4 Contribution/Balance Fault.” This diagnostic trouble code indicates that the Engine Control Module (ECM) has detected an imbalance in the performance of cylinder 4 compared to the other cylinders in the engine. This imbalance can be due to various factors affecting the cylinder’s ability to contribute to the engine’s overall power output.

DTC P0273 symptoms

Common symptoms associated with DTC P0273 may include:

• Rough idling or misfiring of the engine
• Decreased engine performance and power
• Increased fuel consumption
• Illuminated check engine light
• Vibration or shaking during acceleration

DTC P0273 causes

Several factors can lead to the triggering of DTC P0273, including:

• Faulty fuel injector for cylinder 4
• Worn or damaged spark plug or ignition coil
• Vacuum leaks affecting cylinder 4
• Low compression in cylinder 4 due to mechanical issues
• Faulty engine control module (ECM)

DTC P0273 seriousness

DTC P0273 can be considered serious as it indicates that one of the engine’s cylinders is not functioning properly. If left unaddressed, this issue can lead to:

• Increased emissions
• Potential engine damage
• Decreased fuel efficiency
• Further deterioration of engine performance

How to diagnose DTC P0273

To diagnose DTC P0273, follow these steps:

1. Use an OBD-II scanner to confirm the presence of DTC P0273.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the spark plug and ignition coil for cylinder 4.
4. Test the fuel injector operation for cylinder 4.
5. Perform a compression test on cylinder 4 to check for mechanical issues.
6. Inspect for vacuum leaks around the intake manifold and related components.

How to fix DTC P0273 step-by-step instructions

To fix DTC P0273, follow these steps:

1. Replace the faulty spark plug or ignition coil for cylinder 4 if found defective.
2. Clean or replace the fuel injector for cylinder 4 if it is malfunctioning.
3. Repair any vacuum leaks identified during the diagnosis.
4. Address any mechanical issues found during the compression test.
5. Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.

How to erase DTC P0273

To erase DTC P0273, 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 Codes” 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 return.

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