102 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 |
|---|---|---|---|
| P0252 | Fuel System | Black Smoke / Engine Surges | View fix |
| P0253 | Fuel System | Engine Starves for Fuel / Stalls | View fix |
| P0254 | Fuel System | Engine Stumbles / Hard Diesel Knock | View fix |
| P0255 | Fuel System | Erratic Engine Shuddering at Random Speeds | View fix |
| P0256 | Fuel System | High Pressure Fuel Loop Failure | View fix |
| P0257 | Fuel System | Power Sag under Extreme Heavy Duty Operation | View fix |
| P0258 | Fuel System | Fuel Rail Fails to Meet Commanded Pressure | View fix |
| P0259 | Fuel System | Engine Rattles due to Uncontrolled Rail Pressure | View fix |
| P0260 | Fuel System | Random Dropouts in High-Pressure Output | View fix |
| P0261 | Fuel System | Misfire Cylinder 1 / Lean Shake | View fix |
| P0262 | Fuel System | Heavy Fuel Knock Cylinder 1 | View fix |
| P0263 | Fuel System | Intermittent Rough Idle / Power Sag | View fix |
| P0264 | Fuel System | Misfire Cylinder 2 / Shaking Idle | View fix |
| P0265 | Fuel System | Injector 2 Floods Cylinder | View fix |
| P0266 | Fuel System | Rough Running under Load | View fix |
| P0267 | Fuel System | Misfire Cylinder 3 | View fix |
| P0268 | Fuel System | Misfire Cylinder 3 / High Smoke | View fix |
| P0269 | Fuel System | Engine Shudders on Acceleration | View fix |
| P0270 | Fuel System | Misfire Cylinder 4 | View fix |
| P0271 | Fuel System | Injector 4 Stuck Wide Open | View fix |
| P0272 | Fuel System | Rough Running / Shaking Idle | View fix |
| P0273 | Fuel System | Misfire Cylinder 5 | View fix |
| P0274 | Fuel System | Severe Knocking from Cylinder 5 | View fix |
| P0275 | Fuel System | Power Loss under High Machine Loads | View fix |
| P0276 | Fuel System | Misfire Cylinder 6 | View fix |
| P0277 | Fuel System | Cylinder 6 Injector Over-fueling | View fix |
| P0278 | Fuel System | Engine Shudders at Low Idle Speeds | View fix |
| P0279 | Fuel System | Misfire Cylinder 7 | View fix |
| P0280 | Fuel System | Cylinder 7 Spark Plug Flooded | View fix |
| P0281 | Fuel System | Engine Shakes during Transient Throttle Shifts | View fix |
| P0282 | Fuel System | Misfire Cylinder 8 | View fix |
| P0283 | Fuel System | Cylinder 8 Pre-Ignition / Knock | View fix |
| P0284 | Fuel System | Rough Running at High RPM | View fix |
| P0285 | Fuel System | Misfire Cylinder 9 | View fix |
| P0286 | Fuel System | Cylinder 9 Over-Fueling Misfires | View fix |
| P0287 | Fuel System | Engine Shudders on Grade Changes | View fix |
| P0288 | Fuel System | Misfire Cylinder 10 | View fix |
| P0289 | Fuel System | Cylinder 10 Knock Alarm Active | View fix |
| P0290 | Fuel System | Power Drop during Load Pulls | View fix |
| P0291 | Fuel System | Misfire Cylinder 11 | View fix |
| P0292 | Fuel System | Cylinder 11 Fuel Stench from Tailpipe | View fix |
| P0293 | Fuel System | Engine Hunting under Constant Speed | View fix |
| P0294 | Fuel System | Misfire Cylinder 12 | View fix |
| P0295 | Fuel System | Cylinder 12 Heavy Pre-ignition | View fix |
| P0296 | Fuel System | Rough Running on Massive V12 Engines | View fix |
| P0460 | Fuel System | Fuel Gauge Stuck / Erratic Dash Feed | View fix |
| P0461 | Fuel System | Fuel Gauge Sluggish / MIL On | View fix |
| P0462 | Fuel System | Fuel Gauge Reads E (Empty) Always | View fix |
| P0463 | Fuel System | Fuel Gauge Reads F (Full) Always | View fix |
| P0464 | Fuel System | Fuel Gauge Needle Drops to Empty over Bumps | View fix |
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