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 |
|---|---|---|---|
| P0356 | Ignition | Dead Misfire Cylinder 6 | Unlock |
| P0357 | Ignition | Dead Misfire Cylinder 7 | Unlock |
| P0358 | Ignition | Dead Misfire Cylinder 8 | Unlock |
| P0359 | Ignition | Dead Misfire Cylinder 9 | Unlock |
| P0360 | Ignition | Dead Misfire Cylinder 10 | Unlock |
| P0361 | Ignition | Dead Misfire Cylinder 11 | Unlock |
| P0362 | Ignition | Dead Misfire Cylinder 12 | Unlock |
| P0370 | Ignition | Engine Cranks Long / Stumbles | Unlock |
| P0371 | Ignition | Engine Misfires / Errant RPM Spikes | Unlock |
| P0372 | Ignition | Engine Hesitates / Shuts Down | Unlock |
| P0373 | Ignition | Engine Bucking / Sudden Spark Drops | Unlock |
| P0374 | Ignition | Engine Refuses to Start / No Spark | Unlock |
| P0375 | Ignition | Extended Crank / Limp Mode Warning | Unlock |
| P0376 | Ignition | Erratic RPM Readouts / Spark Ping | Unlock |
| P0377 | Ignition | Engine Sags during Gear Shifts | Unlock |
| P0378 | Ignition | Sudden Brief Stumbles at High Cruise | Unlock |
| P0379 | Ignition | No-Start / Backfires on Crank | Unlock |
| P0380 | Ignition | Hard Starting in Cold Weather / White Smoke | Unlock |
| P0381 | Ignition | Glow Plug Light Stays On / Inoperative | Unlock |
| P0382 | Emissions | Exhaust Gas Recirculation Failure | Unlock |
| P0385 | Ignition | Hard Cranking / Stumbles / Backfires | Unlock |
| P0386 | Ignition | Engine Sag / Sudden Power Drops | Unlock |
| P0387 | Ignition | Engine Falls into Backup Limp Maps | Unlock |
| P0388 | Ignition | Engine Shuts Down / No Spark | Unlock |
| P0389 | Ignition | Erratic Engine Shudders over Bumps | Unlock |
| P0400 | Emissions | Engine Pings under Load / MIL On | Unlock |
| P0401 | Exhaust | Surging / Poor Economy | Unlock |
| P0401 | Emissions | Engine Pings / High Combustion Temp | Unlock |
| P0402 | Emissions | Rough Idle / Stalling at Stoplights | Unlock |
| P0403 | Emissions | MIL On / Rough Acceleration | Unlock |
| P0404 | Emissions | Surging at Steady Highway Cruise | Unlock |
| P0405 | Emissions | MIL On Only | Unlock |
| P0406 | Emissions | Engine Shudders / Limp Mode Warning | Unlock |
| P0407 | Emissions | MIL On | Unlock |
| P0408 | Emissions | MIL On / Reduced Power | Unlock |
| P0410 | Emissions | MIL On / Loud Pump Whine | Unlock |
| P0411 | Emissions | MIL On / Cold Start Shudder | Unlock |
| P0412 | Emissions | MIL On Only | Unlock |
| P0413 | Emissions | MIL On | Unlock |
| P0414 | Emissions | Secondary Air Fuse Blown | Unlock |
| P0415 | Emissions | MIL On | Unlock |
| P0416 | Emissions | MIL On | Unlock |
| P0417 | Emissions | Air System Relay Clicks Rapidly | Unlock |
| P0418 | Emissions | Loud Whining Pump Fails to Run | Unlock |
| P0419 | Emissions | MIL On | Unlock |
| P0420 | Emissions | MIL Illuminated / No Performance Loss | Unlock |
| P0420 | Emissions | Check Engine Light Only / No Performance Loss | Unlock |
| P0421 | Emissions | MIL On / Catalyst Test Incomplete | Unlock |
| P0422 | Emissions | MIL On | Unlock |
| P0423 | Emissions | MIL On | Unlock |
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