What do OBD2 trouble codes mean?

OBD2 trouble codes (DTCs) are diagnostic codes stored by your vehicle's computer when it detects a problem. Codes starting with P are powertrain (engine/transmission), B are body, C are chassis, and U are network/communication. Each code points to a specific system or component that needs attention.

OBD2 Trouble Code Lookup

Intake Camshaft Position Actuator Circuit (Bank 1)

Intake Camshaft Position Timing Over-Advanced (Bank 1)

Intake Camshaft Position Timing Over-Retarded (Bank 1)

Exhaust Camshaft Position Actuator Circuit (Bank 1)

Exhaust Camshaft Position Timing Over-Advanced (Bank 1)

Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor A)

Crankshaft Position - Camshaft Position Correlation (Bank 1 Sensor B)

Intake Camshaft Position Timing Over-Advanced (Bank 2)

Intake Camshaft Position Timing Over-Retarded (Bank 2)

HO2S Heater Control Circuit (Bank 1, Sensor 1)

HO2S Heater Control Circuit Low (Bank 1, Sensor 1)

HO2S Heater Control Circuit (Bank 1, Sensor 2)

HO2S Heater Control Circuit Low (Bank 1, Sensor 2)

Mass Air Flow Sensor Circuit Range/Performance

Mass Air Flow Sensor Circuit Low Input

Mass Air Flow Sensor Circuit High Input

MAP/BARO Sensor Circuit Range/Performance

MAP/BARO Sensor Circuit Low Input

MAP/BARO Sensor Circuit High Input

Intake Air Temperature Sensor Circuit

Intake Air Temperature Sensor Circuit Low

Intake Air Temperature Sensor Circuit High

Engine Coolant Temperature Sensor Circuit

Engine Coolant Temperature Sensor Range/Performance

Engine Coolant Temperature Sensor Circuit Low

Engine Coolant Temperature Sensor Circuit High

Throttle Position Sensor A Circuit

Throttle Position Sensor A Range/Performance

Throttle Position Sensor A Circuit Low

Throttle Position Sensor A Circuit High

Insufficient Coolant Temperature for Closed Loop Fuel Control

Coolant Thermostat Below Regulating Temperature

O2 Sensor Circuit (Bank 1, Sensor 1)

O2 Sensor Circuit Low Voltage (Bank 1, Sensor 1)

O2 Sensor Circuit High Voltage (Bank 1, Sensor 1)

O2 Sensor Circuit Slow Response (Bank 1, Sensor 1)

O2 Sensor Circuit No Activity Detected (Bank 1, Sensor 1)

O2 Sensor Heater Circuit (Bank 1, Sensor 1)

O2 Sensor Circuit (Bank 1, Sensor 2)

O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)

O2 Sensor Circuit High Voltage (Bank 1, Sensor 2)

O2 Sensor Circuit Slow Response (Bank 1, Sensor 2)

O2 Sensor Circuit No Activity (Bank 1, Sensor 2)

O2 Sensor Heater Circuit (Bank 1, Sensor 2)

O2 Sensor Circuit (Bank 2, Sensor 1)

O2 Sensor Circuit Low Voltage (Bank 2, Sensor 1)

O2 Sensor Circuit High Voltage (Bank 2, Sensor 1)

O2 Sensor Circuit Slow Response (Bank 2, Sensor 1)

O2 Sensor Circuit No Activity (Bank 2, Sensor 1)

O2 Sensor Heater Circuit (Bank 2, Sensor 1)

O2 Sensor Circuit (Bank 2, Sensor 2)

O2 Sensor Circuit Low Voltage (Bank 2, Sensor 2)

O2 Sensor Circuit High Voltage (Bank 2, Sensor 2)

O2 Sensor Circuit Slow Response (Bank 2, Sensor 2)

O2 Sensor Circuit No Activity (Bank 2, Sensor 2)

O2 Sensor Heater Circuit (Bank 2, Sensor 2)

System Too Lean (Bank 1)

System Too Rich (Bank 1)

System Too Lean (Bank 2)

System Too Rich (Bank 2)

Fuel Rail Pressure Sensor Circuit Range/Performance

Fuel Rail Pressure Sensor Circuit Low

Fuel Rail Pressure Sensor Circuit High

Injector Circuit Malfunction

Injector Circuit Malfunction - Cylinder 1

Injector Circuit Malfunction - Cylinder 2

Injector Circuit Malfunction - Cylinder 3

Injector Circuit Malfunction - Cylinder 4

Injector Circuit Malfunction - Cylinder 5

Injector Circuit Malfunction - Cylinder 6

Engine Coolant Over Temperature

Transmission Fluid Over Temperature

Engine Over Speed Condition

Throttle/Pedal Position Sensor B Circuit

Throttle/Pedal Position Sensor B Range/Performance

Throttle/Pedal Position Sensor B Circuit Low

Throttle/Pedal Position Sensor B Circuit High

Fuel Pump Primary Circuit

Fuel Pump Secondary Circuit Low