OBD fault code library

Look up any P or U code to see what it means, what causes it, the parts involved and how it gets fixed.

Free on OBD DashX

Looking for real-world repair data?

OBD DashX shows which problems come with each code, how often they show up in other vehicles, and how to fix them — step by step.

  • Real-world fix data
  • How often it happens
  • Step-by-step repairs
Browse codes on OBD DashX No sign-up needed · available in 10 languages
P1242 Injector Circuit Open Cylinder 6
Hyundai Injector Circuit High severity
P1313 Misfire Rate Catalyst Damage Fault Bank 1
Honda Ignition System High severity
P1338 Camshaft Position Sensor Bank 1 Open Circuit Or Short To Positive
Honda Fuel and Air Metering Medium severity
P1398 Wheel Speed Sensor 2 G-Sensor Circuit High Voltage
Honda Vehicle Speed and Idle Control System High severity
P1399 Random Cylinder Misfire Detected
Honda Ignition System High severity
P1445 Bypass Control Problem
Honda Vehicle Speed and Idle Control System High severity
P1470 EVAP Control System LDP Circuit Electrical Malfunction
Honda Auxiliary Emissions Control Low severity
P1474 EVAP Canister Purge Solenoid Valve Electrical Malfunction
Honda Auxiliary Emissions Control Low severity
P1477 EVAP Control System LDP Malfunction
Honda Auxiliary Emissions Control Low severity
P1479 Brake Vacuum System Mechanical Malfunction
Honda Vehicle Speed and Idle Control System Low severity
P1484 Cooling Fan RPM Signal Malfunction
Honda Vehicle Speed and Idle Control System High severity
P1490 EVAP Canister Purge Regulator Valve 2 Short To Ground
Honda Auxiliary Emissions Control Low severity
P1004 Short Runner Valve Control Performance
Hyundai Fuel and Air Metering High severity

Search fault codes

Scan your own car

Read and clear fault codes, live data and service resets with the CaRPM app.