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.
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Fault codes
P0101
Mass or Volume Air Flow Circuit Range/Performance Problem
Generic
Fuel and Air Metering
High severity
P0106
Manifold Absolute Pressure/Barometric Pressure Circuit Range/Performance Problem
Generic
Fuel and Air Metering
High severity
P0109
Manifold Absolute Pressure/Barometric Pressure Circuit Intermittent
Generic
Fuel and Air Metering
High severity
P0123
Throttle Position Sensor/Switch A Circuit High Input
Generic
Fuel and Air Metering
High severity
P0126
Insufficient Coolant Temperature for Stable Operation
Generic
Fuel and Air Metering
High severity
P0134
O2 Sensor Circuit No Activity Detected Sensor 1 Bank 1
Generic
Fuel and Air Metering
Medium severity
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