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
P0044
HO2S Heater Control Circuit High Bank 1 Sensor 4
Generic
Fuel and Air Metering
Medium severity
P3474
Cylinder 10 Deactivation/Intake Valve Control Circuit Performance
Fuel and Air Metering
High severity
P3490
Cylinder 12 Deactivation/Intake Valve Control Circuit Performance
Fuel and Air Metering
High severity
P3492
Cylinder 12 Deactivation/Intake Valve Control Circuit High
Fuel and Air Metering
High severity
P1000
On Board Diagnostic System Readiness Test Not Complete
Audi
Auxiliary Emissions Control
High severity
P1002
Ignition Key Off Timer Performance Too Slow
Audi
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.