71 Generic diagnostic codes on file — with the full diagnosis, repair steps, and field insights open to read free, no signup required.
Disclaimer: General reference information for trained, qualified technicians only. Codes and procedures vary by model, serial number and software version. Always follow the manufacturer's service manual and your site's safety procedures. Use at your own risk. Not affiliated with or endorsed by any manufacturer.
| Code | System | Symptom | Full fix |
|---|---|---|---|
| P0361 | Ignition | Dead Misfire Cylinder 11 | View fix |
| P0362 | Ignition | Dead Misfire Cylinder 12 | View fix |
| P0370 | Ignition | Engine Cranks Long / Stumbles | View fix |
| P0371 | Ignition | Engine Misfires / Errant RPM Spikes | View fix |
| P0372 | Ignition | Engine Hesitates / Shuts Down | View fix |
| P0373 | Ignition | Engine Bucking / Sudden Spark Drops | View fix |
| P0374 | Ignition | Engine Refuses to Start / No Spark | View fix |
| P0375 | Ignition | Extended Crank / Limp Mode Warning | View fix |
| P0376 | Ignition | Erratic RPM Readouts / Spark Ping | View fix |
| P0377 | Ignition | Engine Sags during Gear Shifts | View fix |
| P0378 | Ignition | Sudden Brief Stumbles at High Cruise | View fix |
| P0379 | Ignition | No-Start / Backfires on Crank | View fix |
| P0380 | Ignition | Hard Starting in Cold Weather / White Smoke | View fix |
| P0381 | Ignition | Glow Plug Light Stays On / Inoperative | View fix |
| P0385 | Ignition | Hard Cranking / Stumbles / Backfires | View fix |
| P0386 | Ignition | Engine Sag / Sudden Power Drops | View fix |
| P0387 | Ignition | Engine Falls into Backup Limp Maps | View fix |
| P0388 | Ignition | Engine Shuts Down / No Spark | View fix |
| P0389 | Ignition | Erratic Engine Shudders over Bumps | View fix |
| P050B | Ignition | Rough Cold Start / Stumble | View fix |
| P0603 | Computer | Radio Presets Lost / Periodic Limp Mode | View fix |
Same codes keep coming back?
That's a program problem, not a part problem. Book a 30-minute uptime review with Grant, a Red Seal Heavy Duty Technician.
AM Fleet Integrity gives you QR-code operator reporting, preventive maintenance scheduling, and predictive alerts in one place. Start your 14-day free trial — no credit card required.
Start your free trial