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

P1100 MAF Sensor Intermittent/ Check of all OBDII Systems Not Complete

Fuel and Air Metering High severity

P1102 MAF Sensor In Range But Lower Than Expected

Fuel and Air Metering High severity

P1103 MAF Sensor In Range But Higher Than Expected

Fuel and Air Metering High severity

P1113 IAT Sensor Open/Short

Fuel and Air Metering High severity

P1116 Engine Coolant sensor out of range/ECT Sensor Out Of Self Test Range

Fuel and Air Metering High severity

P1117 Engine Coolant Sensor intermittent/ECT Sensor Intermittent

Fuel and Air Metering High severity

P1118 Manifold Absolute Temperature Circuit Low Input

Fuel and Air Metering High severity

P1120 Throttle position sensor out of range

Fuel and Air Metering High severity

P1124 Throttle Position Sensor Out Of Self Test Range

Fuel and Air Metering High severity

P1125 Throttle position sensor intermittent

Fuel and Air Metering High severity

P1126 Throttle Position (Narrow Range) Sensor Circuit Malfunction

Fuel and Air Metering High severity

P1127 Exhaust Not Warm, Downstream O2 Sensor

Fuel and Air Metering High severity

P1130 Lack Of HO2S Switch - Adaptive Fuel At Limit

Fuel and Air Metering High severity

P1131 Lack Of HO2S Switch - Sensor Indicates Lean

Fuel and Air Metering High severity

P1133 HO2S Insufficient Switching Sensor 1

Fuel and Air Metering High severity