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

Browse codes on OBD DashX No sign-up needed · available in 10 languages

Fault codes

P1112 Intake Air Temperature Sensor Circuit Intermittent Low Voltage

Chevrolet Fuel and Air Metering High severity

P1115 Engine Coolant Temperature Sensor Circuit Intermittent High Voltage

Chevrolet Fuel and Air Metering High severity

P1117 Engine Coolant Temp Signal Out-Of-Range Low

Chevrolet Fuel and Air Metering High severity

P1118 Engine Coolant Temp Signal Out-Of-Range High

Chevrolet Fuel and Air Metering High severity

P1119 Engine Coolant Temperature Signal Out Of Range

Chevrolet Fuel and Air Metering High severity

P1120 Throttle Position Sensor 1 Circuit

Chevrolet Fuel and Air Metering High severity

P1122 Throttle Position Sensor Circuit Intermittent Low Voltage

Chevrolet Fuel and Air Metering High severity

P1123 Throttle Position Sensor Circuit Intermittent High Voltage

Chevrolet Fuel and Air Metering High severity

P1125 Accelerator Pedal Position Sensor Fault

Chevrolet Fuel and Air Metering High severity

P1128 Front O2 Sensor Connectors Swapped

Chevrolet Fuel and Air Metering Medium severity

P1129 Downstream Oxygen Sensors Swapped from Bank to Bank

Chevrolet Fuel and Air Metering Medium severity

P1131 HO2S Circuit Low Variance Bank 1 Sensor 2

Chevrolet Fuel and Air Metering Medium severity

P1132 HO2S Circuit Low Variance Bank 2 Sensor 1

Chevrolet Fuel and Air Metering Medium severity

P1134 HO2S Transition Time Ratio Bank 1 Sensor 1

Chevrolet Fuel and Air Metering Medium severity

P1135 HO2S Lean Mean Bank 1 Sensor 1

Chevrolet Fuel and Air Metering Medium severity