504 Generic diagnostic codes on file. Each shows the symptom for free — unlock the full diagnosis, repair steps, and field insights with a free account.
| Code | System | Symptom | Fix |
|---|---|---|---|
| P0241 | Air Intake | Engine Flat Under High Power Demands | Unlock |
| P0242 | Air Intake | Engine Limits Power to Save Intake Components | Unlock |
| P0243 | Air Intake | No Boost Control / Wastegate Stays Open | Unlock |
| P0244 | Air Intake | Boost Spikes / Overboost Cutouts | Unlock |
| P0245 | Air Intake | Overboost / Wastegate Stuck Closed | Unlock |
| P0246 | Air Intake | No Boost / Lazy Turbocharger Response | Unlock |
| P0247 | Air Intake | Twin Turbo Boost Control Loss | Unlock |
| P0248 | Air Intake | Erratic Boost Curves on Twin Turbo Systems | Unlock |
| P0249 | Air Intake | Secondary Turbo Boost Spikes | Unlock |
| P0250 | Air Intake | Secondary Turbo Fails to Build Boost | Unlock |
| P0251 | Fuel System | Engine Coughs and Dies under Acceleration | Unlock |
| P0252 | Fuel System | Black Smoke / Engine Surges | Unlock |
| P0253 | Fuel System | Engine Starves for Fuel / Stalls | Unlock |
| P0254 | Fuel System | Engine Stumbles / Hard Diesel Knock | Unlock |
| P0255 | Fuel System | Erratic Engine Shuddering at Random Speeds | Unlock |
| P0256 | Fuel System | High Pressure Fuel Loop Failure | Unlock |
| P0257 | Fuel System | Power Sag under Extreme Heavy Duty Operation | Unlock |
| P0258 | Fuel System | Fuel Rail Fails to Meet Commanded Pressure | Unlock |
| P0259 | Fuel System | Engine Rattles due to Uncontrolled Rail Pressure | Unlock |
| P0260 | Fuel System | Random Dropouts in High-Pressure Output | Unlock |
| P0261 | Fuel System | Misfire Cylinder 1 / Lean Shake | Unlock |
| P0262 | Fuel System | Heavy Fuel Knock Cylinder 1 | Unlock |
| P0263 | Fuel System | Intermittent Rough Idle / Power Sag | Unlock |
| P0264 | Fuel System | Misfire Cylinder 2 / Shaking Idle | Unlock |
| P0265 | Fuel System | Injector 2 Floods Cylinder | Unlock |
| P0266 | Fuel System | Rough Running under Load | Unlock |
| P0267 | Fuel System | Misfire Cylinder 3 | Unlock |
| P0268 | Fuel System | Misfire Cylinder 3 / High Smoke | Unlock |
| P0269 | Fuel System | Engine Shudders on Acceleration | Unlock |
| P0270 | Fuel System | Misfire Cylinder 4 | Unlock |
| P0271 | Fuel System | Injector 4 Stuck Wide Open | Unlock |
| P0272 | Fuel System | Rough Running / Shaking Idle | Unlock |
| P0273 | Fuel System | Misfire Cylinder 5 | Unlock |
| P0274 | Fuel System | Severe Knocking from Cylinder 5 | Unlock |
| P0275 | Fuel System | Power Loss under High Machine Loads | Unlock |
| P0276 | Fuel System | Misfire Cylinder 6 | Unlock |
| P0277 | Fuel System | Cylinder 6 Injector Over-fueling | Unlock |
| P0278 | Fuel System | Engine Shudders at Low Idle Speeds | Unlock |
| P0279 | Fuel System | Misfire Cylinder 7 | Unlock |
| P0280 | Fuel System | Cylinder 7 Spark Plug Flooded | Unlock |
| P0281 | Fuel System | Engine Shakes during Transient Throttle Shifts | Unlock |
| P0282 | Fuel System | Misfire Cylinder 8 | Unlock |
| P0283 | Fuel System | Cylinder 8 Pre-Ignition / Knock | Unlock |
| P0284 | Fuel System | Rough Running at High RPM | Unlock |
| P0285 | Fuel System | Misfire Cylinder 9 | Unlock |
| P0286 | Fuel System | Cylinder 9 Over-Fueling Misfires | Unlock |
| P0287 | Fuel System | Engine Shudders on Grade Changes | Unlock |
| P0288 | Fuel System | Misfire Cylinder 10 | Unlock |
| P0289 | Fuel System | Cylinder 10 Knock Alarm Active | Unlock |
| P0290 | Fuel System | Power Drop during Load Pulls | Unlock |
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