Cylinder 10 Injector Circuit High
The P0289 code indicates that the powertrain control module (PCM) has detected a high voltage or resistance condition in the electrical circuit of the fuel injector for cylinder 10. This typically means the injector circuit has an open, short to voltage, or high resistance, preventing proper injector operation. The PCM monitors the injector driver circuit and sets this code when the voltage or current is outside the expected range.
1. Most Common Causes
- Faulty fuel injector on cylinder 10 with an open internal coil
- Open or corroded wiring in the injector circuit
- Poor electrical connection or bent pins at the injector or ECM connector
- Short circuit to voltage (short to power) in the injector circuit
- Internal failure of the engine control module (ECM/PCM)
- Issues with the power supply voltage to the injector
2. Symptoms You Will Notice
- Engine misfire on cylinder 10
- Rough idle or hesitation
- Check Engine Light illuminated
- Reduced fuel economy and power
3. Step-by-Step Diagnosis
Step 1: Use a scan tool to confirm P0289 and check for other codes.
Step 2: Visually inspect the injector connector and wiring for damage, corrosion, or loose connections.
Step 3: Measure resistance of cylinder 10 injector; compare to specification (typically 12-16 ohms).
Step 4: Check for voltage at the injector connector with key on; should see battery voltage on one pin.
Step 5: Perform a injector circuit test using a noid light or multimeter to verify PCM driver operation.
4. Frequently Asked Questions
Is it safe to drive with this code?▼
It is not recommended to drive with this code as it can cause engine misfire, reduced performance, and potential damage to the catalytic converter. Have the vehicle diagnosed and repaired promptly.
How much does it cost to fix?▼
The cost typically ranges from $150 to $400, depending on whether the injector needs replacement ($100-$250) or if wiring repairs are needed. Labor adds $50-$150.
5. Commonly Affected Makes
This is a generic OBD2 code, potentially applicable to any manufacturer using this diagnostic standard.