P0305 OBD2 Code on 2012 Chevrolet Express Van 2500 6.0L Diesel - Diagnosis and Troubleshooting
I recently replaced the coil pack, spark plugs, and ignition wires on my 2012 Chevrolet Express Van 2500 with a 6.0L diesel engine. I also performed a stabiltrac service and filled the rear differential with fluid. The vehicle now displays OBD2 code P0305. Despite these repairs, the issue persists. What other potential causes could be responsible for this code? How can I properly diagnose it before replacing any components? The van has 117,000 miles on the odometer.
https://www.obd-codes.com/p0305 For stabiltrac-related issues, you must use an OBD2 scanner capable of reading all vehicle modules. The fault is likely a P0305 code (Cylinder 5 misfire), which may originate from the ignition system or fuel delivery. A diagnostic scan with a professional-grade tool (such as a C-series or B-series scanner) is recommended to confirm the source and rule out other systems like the ECU or fuel injectors.