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
Fault codes
P1028
Intake Manifold Air Control Solenoid Short Open Circuit
Chevrolet
Fuel and Air Metering
High severity
P1031
HO2S Heater Current Monitor Control Circuit Banks 1 and 2 Sensor 1
Chevrolet
Fuel and Air Metering
Medium severity
P1034
Nitrogen Oxides Sensor Signal Outside Tolerance
Chevrolet
Auxiliary Emissions Control
Medium severity
P1036
Nitrogen Oxides Sensor Short To Positive
Chevrolet
Auxiliary Emissions Control
Medium severity
P1047
Bank 1 Camshaft Adjustment Valve 1 Electrical Malfunction
Chevrolet
Ignition System
High severity
P1051
Brake Switch Signal Missing or Improper
Chevrolet
Vehicle Speed and Idle Control System
High severity
Scan your own car
Read and clear fault codes, live data and service resets with the CaRPM app.