P0289 Fault Code

P0289 OBD-II Trouble Code Short Description

Cylinder #10 Injector Circuit High

What does trouble code P0289 mean?

The P0289 fault code on cars refers to the Cylinder #10 Injector Circuit High. This code indicates that there is an issue with the fuel injector circuit for cylinder 10 in the engine.

When the engine control module (ECM) detects a high voltage condition in the circuit, it triggers the P0289 code. Some possible causes for this code include a faulty fuel injector, a malfunctioning fuel injector driver circuit, or a problem with the ECM itself.

To resolve the issue, several steps can be taken. First, a visual inspection of the wiring and connector for cylinder 10 should be done to check for any loose connections or damage. If any issues are found, they should be repaired or replaced as necessary.

Next, the fuel injector for cylinder 10 should be tested to determine if it is functioning properly. This can be done by checking for continuity, resistance, and proper operation of the fuel injector driver circuit. If the fuel injector is found to be faulty, it should be replaced.

In some cases, the problem may lie with the ECM. If all other components have been checked and are working correctly, it may be necessary to replace or reprogram the ECM to resolve the P0289 code.

It is important to address the P0289 fault code as soon as possible to prevent any potential drivability issues or engine damage. It is recommended to seek the assistance of a qualified mechanic or technician to properly diagnose and resolve this issue.


What are the symptoms of the P0289 code?

The P0289 fault code refers to a high circuit condition in the injector of cylinder #10. This code is typically found in diesel engines.

Common symptoms of a P0289 fault code include:

  1. Check Engine Light (CEL) illuminated on the dashboard.
  2. Engine misfire or hesitation during acceleration.
  3. Decreased engine performance and power.
  4. Rough idle or stalling at idle.
  5. Increased fuel consumption.
  6. Smoky exhaust emissions.

If you are experiencing any of these issues, it is recommended to have your vehicle diagnosed and repaired by a qualified mechanic or technician. They will be able to identify the exact cause of the fault code and perform the necessary repairs to resolve the issue.


What causes the P0289 code?

The P0289 fault code refers to a problem with the injector circuit on cylinder #10 of the engine. This code indicates that the circuit is experiencing a high voltage condition. There are several possible causes for this fault code, including:

  1. Faulty injector: A malfunctioning injector on cylinder #10 can cause high voltage in the circuit. This could be due to issues such as a clogged injector or electrical problems within the injector itself.

  2. Wiring issues: Problems with the wiring harness connecting the injector to the engine control module (ECM) can also cause a high voltage condition. This could include issues such as damaged or corroded wires, poor connections, or short circuits.

  3. ECM malfunction: A fault in the ECM can disrupt the injector circuit and lead to a high voltage condition. This could be due to issues such as a faulty ECM relay or a software glitch.

  4. Fuel pressure problems: Insufficient fuel pressure or a fuel system malfunction can cause the injector to operate at a higher voltage than normal. This can be caused by issues such as a clogged fuel filter, a failing fuel pump, or a problem with the fuel pressure regulator.

  5. Other electrical issues: Problems with other components in the electrical system, such as the power supply to the injectors, can also result in a high voltage condition.

To diagnose and repair the P0289 fault code, it is recommended to perform the following steps:

  1. Inspect the injector on cylinder #10 for any visible signs of damage or clogging. Clean or replace the injector if necessary.

  2. Check the wiring harness connecting the injector to the ECM for any signs of damage or poor connections. Repair or replace the wiring as needed.

  3. Test the fuel pressure and inspect the fuel system for any issues. Replace any faulty components or repair any leaks or clogs.

  4. Perform a thorough electrical system test to identify any other potential electrical problems that could be causing the high voltage condition.

  5. If no issues are found with the above steps, consider testing or replacing the ECM if necessary.

Note: It is recommended to consult the specific vehicle's service manual or seek professional assistance for a more accurate diagnosis and repair process.

Possible Solutions

How to fix P0289?

To fix the P0289 fault code, which refers to the Cylinder #10 Injector Circuit High, follow these steps:

  1. Check the wiring: Inspect the wiring harness connected to the cylinder #10 fuel injector. Look for any signs of fraying, damage, or loose connections. Make sure the wiring is securely connected and intact.

  2. Test the injector: Use a multimeter to measure the resistance of the #10 fuel injector. Compare the readings to the manufacturer's specifications. If the resistance is too high, the injector may be faulty and need replacement.

  3. Inspect the fuel injector connector: Check the connector for any signs of corrosion or damage. Clean the connector if necessary and ensure a secure connection.

  4. Check the fuel pressure: Use a fuel pressure gauge to measure the fuel pressure in the system. If the pressure is too high, it can cause the injector circuit to read as high. Address any fuel pressure issues.

  5. Scan for additional codes: Use a diagnostic scanner to check for any additional fault codes. Address any other codes found as they may be related to the P0289 fault code.

  6. Test the power and ground circuits: Use a voltmeter to test the power and ground circuits of the fuel injector. Verify that the appropriate voltage is reaching the injector and that the ground connection is solid.

  7. ECM inspection: If all else fails, the Engine Control Module (ECM) may be faulty. Consult a professional mechanic to perform further diagnostics and potentially replace the ECM if necessary.

Remember to clear the fault code from the system after each step and test the vehicle to ensure the issue has been resolved. If you're unsure or uncomfortable with performing these tasks, it's recommended to seek assistance from a qualified mechanic.