THE CODE DIRECTORY

Diagnostic code references — Page 3.

Browse canonical reference entries. Each definition keeps its own source and vehicle-applicability limits.

11,786 code references

Generic OBD-II
C0019

Left Rear Outlet Control

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Generic OBD-II
C001A

Left Rear Hydraulic Release Too Long

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Generic OBD-II
C001C

Right Rear Inlet Control

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Generic OBD-II
C001D

Right Rear Outlet Control

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Generic OBD-II
C001E

Right Rear Hydraulic Release Too Long

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Generic OBD-II
C0020

ABS Pump Motor Control

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Generic OBD-II
C0021

Brake Booster Performance

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Generic OBD-II
C0022

Brake Booster Solenoid

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Generic OBD-II
C0023

Stop Lamp Control

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Generic OBD-II
C0024

Brake Pedal Feedback Pressure Solenoid Circuit

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Generic OBD-II
C0025

Brake Pedal Feedback Pressure Sensor Circuit

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Generic OBD-II
C0030

Left Front Tone Wheel

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Generic OBD-II
C0031

Left Front Wheel Speed Sensor

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Generic OBD-II
C0032

Left Front Wheel Speed Sensor Supply

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Generic OBD-II
C0033

Right Front Tone Wheel

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Generic OBD-II
C0034

Right Front Wheel Speed Sensor

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Generic OBD-II
C0035

Right Front Wheel Speed Sensor Supply

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Generic OBD-II
C0036

Left Rear Tone Wheel

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Generic OBD-II
C0037

Left Rear Wheel Speed Sensor

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Generic OBD-II
C0038

Left Rear Wheel Speed Sensor Supply

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Generic OBD-II
C0039

Right Rear Tone Wheel

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Generic OBD-II
C003A

Right Rear Wheel Speed Sensor

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Generic OBD-II
C003B

Right Rear Wheel Speed Sensor Supply

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Generic OBD-II
C003C

Rear Tone Wheel

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Generic OBD-II
C003D

Rear Wheel Speed Sensor

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Generic OBD-II
C003E

Rear Wheel Speed Sensor Supply

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Generic OBD-II
C003F

Wheel Speed Sensors Rotation Direction Correlation

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Generic OBD-II
C0040

Brake Pedal Switch A

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Generic OBD-II
C0041

Brake Pedal Switch B

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Generic OBD-II
C0042

Brake Pedal Position Sensor Circuit A

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Generic OBD-II
C0043

Brake Pedal Position Sensor Circuit B

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Generic OBD-II
C0044

Brake Pressure Sensor A

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Generic OBD-II
C0045

Brake Pressure Sensor B

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Generic OBD-II
C0046

Brake Pressure Sensor A/B

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Generic OBD-II
C0047

Brake Booster Pressure Sensor

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Generic OBD-II
C0048

Brake Booster Travel Sensor

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Generic OBD-II
C0049

Brake Fluid Level

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Generic OBD-II
C004A

Brake Lining Wear Sensor

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Generic OBD-II
C004B

Brake Fluid Level Sensor/Switch Circuit/Open

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Generic OBD-II
C004C

Brake Booster Motor A Position Sensor Exceeded Learning Limit

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Generic OBD-II
C004D

Brake System Pressure Slow Response

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Generic OBD-II
C004E

Brake System Pressure Control Valve Actuator Stuck

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Generic OBD-II
C004F

ABS Control Module Over Temperature

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Generic OBD-II
C0051

Steering Wheel Position Sensor

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Generic OBD-II
C0052

Steering Wheel Position Sensor Signal A

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Generic OBD-II
C0053

Steering Wheel Position Sensor Signal B

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Generic OBD-II
C0054

Steering Wheel Position Sensor Signal C

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Generic OBD-II
C0055

Steering Wheel Position Sensor Signal D

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Generic OBD-II
C0061

Lateral Acceleration Sensor

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Generic OBD-II
C0062

Longitudinal Acceleration Sensor

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Generic OBD-II
C0063

Yaw Rate Sensor

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Generic OBD-II
C0064

Roll Rate Sensor

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Generic OBD-II
C0065

Vertical Acceleration Sensor

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Generic OBD-II
C0069

Yaw Rate/Longitude Sensors

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Generic OBD-II
C006A

Multi-axis Acceleration Sensor

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Generic OBD-II
C006B

Stability System Active Too Long

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Generic OBD-II
C006C

Stability System

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Generic OBD-II
C0071

2/4 Wheel Drive Status Input

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Generic OBD-II
C0072

Brake Temperature Too High

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Generic OBD-II
C0073

Delivered Driving Torque

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Generic OBD-II
C0074

Requested Driving Torque

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Generic OBD-II
C0075

Brake Pedal Position Performance

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Generic OBD-II
C0076

PWM for Traction Control

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Generic OBD-II
C0077

Low Tire Pressure

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Generic OBD-II
C0078

Tire Diameter

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Generic OBD-II
C0079

Variable Effort Steering

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Generic OBD-II
C0081

ABS Malfunction Indicator

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Generic OBD-II
C0082

Brake System Malfunction Indicator

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Generic OBD-II
C0083

Tire Pressure Monitor Malfunction Indicator

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Generic OBD-II
C0084

Traction Active Indicator

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Generic OBD-II
C0085

Traction Disable Indicator

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Generic OBD-II
C0086

Vehicle Dynamics Indicator

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Generic OBD-II
C0089

TCS Disable Switch

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Generic OBD-II
C008A

TCS Mode Control

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Generic OBD-II
C0090

4WD/AWD Power Transfer Unit Actuator

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Generic OBD-II
C0091

4WD/AWD Power Transfer Unit Position Sensor A

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Generic OBD-II
C0092

4WD/AWD Power Transfer Unit Position Sensor B

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Generic OBD-II
C0093

4WD/AWD Power Transfer Unit Temperature Sensor

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Generic OBD-II
C0094

4WD/AWD Rear Differential Unit Temperature Sensor

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Generic OBD-II
C0095

4WD/AWD Rear Differential Unit Actuator A

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Generic OBD-II
C0096

4WD/AWD Rear Differential Unit Actuator A Data

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Generic OBD-II
C0097

4WD/AWD Rear Differential Unit Actuator B

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Generic OBD-II
C0098

4WD/AWD Rear Differential Unit Actuator B Data

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Generic OBD-II
C0099

4WD/AWD Rear Differential Unit Actuator A Position Sensor A

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Generic OBD-II
C009A

4WD/AWD Rear Differential Unit Actuator A Position Sensor B

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Generic OBD-II
C009B

4WD/AWD Rear Differential Unit Actuator A Position Sensor C

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Generic OBD-II
C009C

4WD/AWD Rear Differential Unit Actuator A Position Sensor Correlation

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Generic OBD-II
C009D

4WD/AWD Rear Differential Unit Actuator B Position Sensor A

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Generic OBD-II
C009E

4WD/AWD Rear Differential Unit Actuator B Position Sensor B

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Generic OBD-II
C009F

4WD/AWD Rear Differential Unit Actuator B Position Sensor C

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Generic OBD-II
C00A0

4WD/AWD Rear Differential Unit Actuator B Position Sensor Correlation

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Generic OBD-II
C00A1

Driveline Control Module

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Generic OBD-II
C00A2

Driveline Control Module Power Transfer Unit Control Circuit Driver

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Generic OBD-II
C00A3

Driveline Control Module Rear Differential Unit A Control Circuit Driver

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Generic OBD-II
C00A4

Driveline Control Module Rear Differential Unit B Control Circuit Driver

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Generic OBD-II
C00A5

Driveline Control Module Transfer Case Unit Control Circuit Driver

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Generic OBD-II
C00A6

4WD/AWD Transfer Case Unit Actuator

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Generic OBD-II
C00A7

4WD/AWD Transfer Case Unit Actuator Position Sensor A

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Generic OBD-II
C00A8

4WD/AWD Transfer Case Unit Actuator Position Sensor B

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Generic OBD-II
C0500

Left Front Wheel Speed Sensor A Circuit/Open

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These are code references, not a list of confirmed faults on every vehicle. Read the source and applicability notes, then match the exact vehicle, year, engine and scan report.