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
P1101
MAF Sensor Out Of Self Test Range/KOER Not Able To Complete KOER Aborted
Fuel and Air Metering
High severity
P1106
Dual Alternator Lower Fault/ Manifold Absolute Pressure (MAP) Sensor Circuit Intermittent High Voltage
Vehicle Speed and Idle Control System
High severity
P1111
Intake Air Temperature (IAT) Sensor Circuit Intermittent High Voltage
Fuel and Air Metering
High severity
P1112
Intake Air Temperature (IAT) Sensor Circuit Intermittent Low Voltage
Fuel and Air Metering
High severity
P1114
Engine Coolant Temperature (ECT) Sensor Circuit Intermittent Low Voltage/IAT - B Circuit Low Input
Fuel and Air Metering
High severity
P1115
Engine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage/IAT - B Circuit High Input
Fuel and Air Metering
High severity
P1123
Throttle Position Sensor In Range But Higher Than Expected
Fuel and Air Metering
High severity
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