DTC codes
Look up an OBD-II fault code: what it means on every car or on your make, and how to track it down.
How to read a code
- P
- SystemPowertrain
- 0
- Defined bySAE, the same on every car
- 4
- AreaAuxiliary emission controls
- 20
- FaultThe specific fault in that area
Read the code
Note every stored and pending code your scanner shows, such as P0420.
Find it
Search by code or by words. For a manufacturer code (P1, B1, C1, U1) pick your make: its meaning differs by make.
Open the code
Its page explains the symptoms, likely causes, the checks to run and the fixes.
- P1115Kia · PowertrainH02S12 Heater Circuit Low Voltage
- P1115Lincoln · PowertrainEngine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage IAT B Circuit High Input
- P1115Mercury · PowertrainEngine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage IAT B Circuit High Input
- P1115Oldsmobile · PowertrainEngine Coolant Temperature ECT Sensor Circuit Intermittent High Voltage IAT B Circuit High Input
- P1115Other · PowertrainEngine Coolant Temperature (ECT) Sensor Circuit Intermittent High Voltage/IAT - B Circuit High Input
- P1115Saturn · PowertrainEngine Coolant Temperature ECT Sensor Circuit Intermittent High Voltage
- P1115Subaru · PowertrainEngine Torque Control Cut Signal Circuit High Input
- P1115Volkswagen · PowertrainOxygen Sensor Heater Circuit Short To Ground Bank 1 Sensor 1
- P1116BMW · PowertrainMass Or Volume Air Flow Circuit Range Performance Problem Bank 2
- P1116Buick · PowertrainECT Signal Unstable Or Intermittent
- P1116Cadillac · PowertrainECT Signal Unstable Or Intermittent
- P1116Chevrolet · PowertrainECT Signal Unstable Or Intermittent
- P1116Chrysler · PowertrainECT Signal Unstable Or Intermittent
- P1116Ford · PowertrainEngine Coolant Temperature Sensor is Out of Self-Test Range
- P1116GM · PowertrainECT Signal Unstable Or Intermittent
- P1116GMC · PowertrainECT Signal Unstable Or Intermittent
- P1116Lincoln · PowertrainEngine Coolant Temperature Sensor is Out of Self-Test Range
- P1116Mazda · PowertrainECT Sensor Circuit Out Of Self Test Range
- P1116Mercury · PowertrainEngine Coolant Temperature Sensor is Out of Self-Test Range
- P1116Oldsmobile · PowertrainECT Signal Unstable Or Intermittent
- P1116Other · PowertrainEngine Coolant sensor out of range/ECT Sensor Out Of Self Test Range
- P1116Saturn · PowertrainECT Signal Unstable Or Intermittent
- P1116Subaru · PowertrainEngine Torque Control Cut Signal Circuit Low Input
- P1116Volkswagen · PowertrainOxygen Sensor Heater Circuit Open Bank 1 Sensor 1
- P1117BMW · PowertrainMass Or Volume Air Flow Circuit Low Input Bank 2
- P1117Buick · PowertrainEngine Coolant Temp Signal Out-Of-Range Low
- P1117Cadillac · PowertrainEngine Coolant Temp Signal Out-Of-Range Low
- P1117Chevrolet · PowertrainEngine Coolant Temp Signal Out-Of-Range Low
- P1117Chrysler · PowertrainEngine Coolant Temp Signal Out-Of-Range Low
- P1117Ford · PowertrainEngine Coolant Temperature Sensor Intermittent