P0287 Fault Code

P0287 OBD-II Trouble Code Short Description

Cylinder 9 Contribution/Balance

What does trouble code P0287 mean?

Error code P0287 indicates a problem with cylinder 9 contribution or balance in the engine. When this code is present, it means that the power output of cylinder 9 is not meeting the expected levels, causing an imbalance in the engine's performance.

The possible causes of this fault code may include:

  1. Injector Issues: A malfunctioning or clogged fuel injector in cylinder 9 can result in an improper fuel-air mixture, leading to an imbalance in combustion.

  2. Fuel Delivery Problems: Insufficient fuel pressure or a problem with the fuel delivery system can affect the performance of cylinder 9, causing the code to trigger.

  3. Engine Mechanical Issues: Problems such as low compression, valve leakage, or worn-out piston rings in cylinder 9 can impact its combustion efficiency, resulting in an imbalance.

  4. Electrical Problems: Faulty wiring, connectors, or issues with the power supply to the fuel injector of cylinder 9 can also lead to the triggering of this fault code.

To diagnose and resolve this issue, it is recommended to follow the below steps:

  1. Visual Inspection: Check for any visible damage to the wiring, connectors, or fuel injector of cylinder 9. Repair or replace any damaged components if necessary.

  2. Fuel Injector Testing: Perform a fuel injector test to ensure it is functioning properly. If it is faulty or clogged, cleaning or replacing the injector may be necessary.

  3. Fuel Pressure Check: Verify that the fuel pressure is within the manufacturer's specified range. If it is too low, there may be a problem with the fuel pump or fuel filter that needs to be addressed.

  4. Compression Test: Conduct a compression test on cylinder 9 to assess its mechanical condition. If low compression is detected, further inspection and repairs may be required to resolve the issue.

  5. Data Analysis: Analyze the data from the vehicle's onboard diagnostic system to identify any other potential underlying issues that may be affecting cylinder 9. This can help pinpoint the exact cause of the imbalance.

It is recommended to consult a professional mechanic or automotive technician with the necessary tools and expertise to diagnose and repair the issue accurately. They will be able to use diagnostic equipment and follow the appropriate procedures to resolve the code effectively.


What are the symptoms of the P0287 code?

Symptoms of the P0287 fault code on cars may include:

  • Rough idling: The engine may run unevenly or may shake erratically when idling.
  • Decreased performance: The vehicle may experience a loss of power, making it difficult to accelerate or maintain speed.
  • Misfires: Cylinder 9 may not be firing correctly, causing a misfire in the engine.
  • Increased fuel consumption: The vehicle may consume more fuel than usual due to the cylinder not contributing properly.
  • Check Engine Light: The check engine light may illuminate on the dashboard to indicate a problem with cylinder 9's contribution or balance.

Note: The symptoms may vary depending on the make and model of the vehicle.


What causes the P0287 code?

The P0287 fault code on cars is related to cylinder number 9 contribution or balance issues. This code indicates that the cylinder 9 injector is not performing within the expected range or is not contributing proportionally to the engine's power output.

Possible causes for the P0287 fault code include:

  • Faulty fuel injector: The injector may be clogged, malfunctioning, or not delivering fuel properly to cylinder 9.
  • Wiring issues: Damaged or corroded wiring harnesses, connectors, or terminals that supply power or signal to the fuel injector.
  • Engine mechanical problems: Low compression in cylinder 9 due to issues like a worn piston ring, valve, or head gasket.
  • Faulty fuel pressure: Insufficient or fluctuating fuel pressure that affects the injector's performance.
  • ECM (Engine Control Module) or PCM (Powertrain Control Module) failure: The computer that controls the engine may have a malfunction affecting injector operation.

To diagnose and repair the P0287 fault code, it is recommended to:

  1. Inspect the wiring harnesses and connectors related to the fuel injector of cylinder 9 for any visible damage or loose connections.
  2. Test the fuel injector's resistance and functionality using appropriate diagnostic equipment.
  3. Check the fuel pressure to ensure it meets specifications outlined by the manufacturer.
  4. Perform a compression test on cylinder 9 to evaluate its mechanical condition.
  5. Scan the ECM/PCM for any additional fault codes or pending codes that may help pinpoint the root cause of the issue.
  6. If necessary, replace the faulty fuel injector, repair/replace damaged wiring, address engine mechanical problems, or perform any other necessary repairs based on the specific diagnosis.

It is highly recommended to consult a professional mechanic or dealership for an accurate diagnosis and proper repairs in relation to the P0287 fault code.

Possible Solutions

How to fix P0287?

The P0287 fault code indicates an issue with the contribution and balance of cylinder 9 in the engine. This fault code is typically found in vehicles with multiple cylinders.

Here are some troubleshooting steps to fix the P0287 fault code:

  1. Check spark plugs: Inspect the spark plugs in cylinder 9 for signs of wear or damage. Replace if necessary.

  2. Inspect ignition coils: Ensure the ignition coil for cylinder 9 is functioning correctly. Test it using a multimeter. Replace if faulty.

  3. Check fuel injector: Examine the fuel injector for cylinder 9. Clean or replace it if there are any signs of clogging or malfunction.

  4. Test compression: Perform a compression test to check the cylinder's pressure. Low compression can cause imbalance. Repair or replace damaged components as needed.

  5. Inspect wiring and connections: Check the wiring harness and connections related to cylinder 9. Look for any loose or damaged wires, and repair them if necessary.

  6. Perform a software update: In some cases, a software update for the engine control module may be required to resolve the issue. Consult with a professional mechanic or dealership for this step.

After performing these steps, clear the fault code using an OBD-II scanner. If the fault code persists, further diagnostic testing may be needed.

Always refer to the manufacturer's specific repair procedures and guidelines for your vehicle.