The P0289: Cylinder 10 Injector Circuit High refers to an issue with the electrical circuit controlling the fuel injector for cylinder 10, where the signal is higher than expected. This problem may be caused by a shorted circuit in the wiring, a faulty injector, or a malfunction in the injector driver within the ECM. When this code appears, it can result in misfires, rough idling, and poor engine performance.
P0289 – Quick Overview
| Meaning | P0289: Cylinder 10 Injector Circuit High |
| Is it serious? | Yes, this code is serious as it may cause misfires, poor engine performance, and increased emissions if not repaired. |
| Possible causes | – Faulty cylinder 10 injector – Shorted circuit in the wiring – Faulty injector driver in the ECM |
| How to diagnose? | – Check the wiring and connectors for the cylinder 10 injector – Test the cylinder 10 injector for proper resistance – Inspect and test the ECM for fault codes related to injector driver |
P0289 Meaning
The P0289: Cylinder 10 Injector Circuit High code indicates that the signal going to the fuel injector for cylinder 10 is higher than it should be. This could result from a short circuit in the wiring, a faulty injector, or an issue with the ECM’s injector driver. When this occurs, it can cause cylinder 10 to malfunction, leading to poor fuel efficiency, misfires, and potential engine damage.
Step-by-step diagnostic guide
Follow these steps to diagnose and fix the P0289 error:
| Action | Description | Tools Needed |
|---|---|---|
| Check for Other Codes | Use an OBD-II scanner to check for additional codes that may help identify the issue. | OBD-II Scanner |
| Inspect Cylinder 10 Injector | Visually check the cylinder 10 injector for any signs of physical damage, corrosion, or loose connections. | Flashlight, Safety Gloves |
| Test the Injector | Use a multimeter to test the resistance of the cylinder 10 injector and compare it to the manufacturer’s specifications. | Multimeter, Manufacturer’s Specifications |
| Inspect Wiring and Connectors | Inspect the wiring and connectors for any signs of damage, shorts, or disconnections. | Flashlight, Multimeter |
| Repair/Replace Wiring | Repair or replace any shorted or damaged wiring and connectors to ensure proper function. | Wire Strippers, Replacement Wires, Electrical Tape |
| Inspect the ECM | Check the ECM for faults related to the injector driver. Reprogram or replace the ECM if necessary. | OBD-II Scanner, Multimeter |
| Clear Code and Test Drive | After repairs, clear the P0289 code with an OBD-II scanner and take the vehicle for a test drive to confirm the issue is resolved. | OBD-II Scanner, Vehicle Owner’s Manual |
| Recheck for Codes | After the test drive, re-scan the vehicle to confirm that the P0289 code does not return. | OBD-II Scanner |
This step-by-step guide will help you diagnose and repair the P0289 code, ensuring that cylinder 10’s fuel injector functions correctly and that your vehicle’s performance is restored.
I test OBD-II scanners and make DIY Engine diagnostics guides to help you solve your car problems without having to depend on the mechanic. A lot of them will try to scam you or are just no help at all. About Juraj Lukacko