Cylinder 10 Injector Circuit High
The P0289 code indicates that the powertrain control module (PCM) has detected a high voltage or resistance in the electrical circuit for the fuel injector on cylinder 10. This typically means the injector circuit is open or shorted to voltage, or the injector itself has high internal resistance. The PCM monitors the injector driver circuit and sets this code when the voltage or current is outside the expected range, often due to wiring issues, a faulty injector, or a problem with the PCM.
01. Most Common Causes
- Faulty fuel injector on cylinder 10 (high internal resistance or open coil)
- Open or shorted wiring in the injector circuit (harness damage, corrosion, loose connector)
- Failed PCM (internal injector driver failure)
02. Symptoms You Will Notice
- Engine misfire on cylinder 10
- Rough idle, poor acceleration, or hesitation
- Check Engine Light illuminated
- Possible fuel odor or increased emissions
03. Step-by-Step Diagnosis
Step 1: Scan for codes and record freeze frame data. Clear codes and test drive to see if P0289 returns.
Step 2: Visually inspect the injector connector and wiring for cylinder 10 for damage, corrosion, or loose pins.
Step 3: Use a multimeter to measure resistance across injector terminals (typically 11-18 ohms). Compare to other injectors.
Step 4: Check for voltage at the injector connector with key on (should see battery voltage on one pin). If missing, trace circuit back to PCM.
Step 5: Perform a continuity test from injector connector to PCM. If open or shorted, repair wiring.
Step 6: If wiring and injector check out, suspect PCM failure. Test injector driver with a noid light or scope.
04. Commonly Affected Makes
05. 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 or other components due to unburned fuel.
How much does it cost to fix?▼
The cost to fix P0289 typically ranges from $150 to $400, including parts and labor. A single injector replacement is around $100-$200, plus diagnostic time. Wiring repairs may be less, while PCM replacement can exceed $500.