Meaning of Code P1261
- Fuel injectors are essential for delivering the correct amount of fuel into the combustion chamber.
- They operate with a piezoelectric actuator controlled by the Powertrain Control Module (PCM).
- Code P1261 indicates a problem detected by the fuel injector interface module in the secondary (rear) fuel injector circuit.
Possible Symptoms
- Check engine light illuminated.
Possible Causes
- Faulty fuel injector 1.
- Fuel injector 1 wiring harness open or short circuit.
- Poor electrical connection in fuel injector 1 circuit.
- Faulty fuel injector interface module.
Repair Procedure
- Visual Inspection:
- Check cables and connectors associated with injector 1.
- Look for signs of damage: frayed wires, corroded connectors, bent or broken pins.
- Check wiring harness connections at the valve cover, including under the valve cover.
- Component Testing:
- If visual inspection reveals no issues, test fuel injector 1.
- Check the fuel injector interface module.
- If possible, test wire continuity.