All OBD2 Diagnostic Codes

Browse our complete database of 16000 diagnostic trouble codes.

C3900 High

Chassis System Code C3900 - Brake System

Chassis system diagnostic trouble code related to brake system operation.

C3901 Medium

C3901: Front Left Lower Control Arm Bushing Wear

This code indicates wear on the front left lower control arm bushing, which can cause uneven tire wear, loose steering, and reduced handling.

C3902 Medium

C3902: Electric Power Steering (EPS) Fault

The C3902 code indicates a fault in the Electric Power Steering (EPS) system, which may cause the steering to become difficult or unresponsive.

C3903 Medium

C3903: Electronic Stability Control (ESC) Malfunction

The Electronic Stability Control (ESC) system has detected a malfunction, which may cause loss of traction and stability.

C3904 Medium

C3904: Traction Control System Malfunction

The traction control system has malfunctioned, likely due to a faulty wheel speed sensor or a problem with the traction control module.

C3905 Medium

C3905: Wheel Speed Sensor Malfunction

The wheel speed sensor malfunction code C3905 indicates a problem with the wheel speed sensor circuit, which can cause issues with the vehicle's anti-lock braking system (ABS) and traction control system.

C3906 Medium

C3906: ABS System Malfunction

The ABS system has detected a malfunction in the wheel speed sensor circuit, which may cause the ABS system to malfunction or not function at all.

C3907 Medium

C3907: Brake System Pressure Sensor Circuit Malfunction

The brake system pressure sensor circuit has malfunctioned, indicating a problem with the brake system's ability to regulate pressure.

C3908 Medium

C3908: Rear Suspension Strut Friction Bushing Fault

This code indicates a fault in the rear suspension strut friction bushing, which can cause uneven tire wear, vibration, and noise.

C3909 Medium

C3909: Electric Power Steering (EPS) System Fault

The C3909 code indicates a fault in the Electric Power Steering (EPS) system, which may cause the vehicle's steering to become difficult or unresponsive.

C3910 Medium

C3910: Electronic Stability Control (ESC) Malfunction

The Electronic Stability Control (ESC) system has detected a malfunction, which may cause the vehicle to lose traction or stability.

C3911 Medium

C3911: Traction Control System Malfunction

The traction control system has malfunctioned due to a faulty wheel speed sensor or a problem with the traction control module.

C3912 High

Chassis System Code C3912 - Wheel Speed Sensors

Chassis system diagnostic trouble code related to wheel speed sensors operation.

C3913 High

Chassis System Code C3913 - ABS System

Chassis system diagnostic trouble code related to abs system operation.

C3914 High

Chassis System Code C3914 - Brake System

Chassis system diagnostic trouble code related to brake system operation.

C3915 High

Chassis System Code C3915 - Suspension

Chassis system diagnostic trouble code related to suspension operation.

C3916 Medium

C3916: Electric Power Steering (EPS) System Fault

The C3916 code indicates a fault in the Electric Power Steering (EPS) system, which may cause the steering to become difficult or unresponsive.

C3917 Medium

C3917: Electronic Stability Control (ESC) Malfunction

The Electronic Stability Control (ESC) system has detected a malfunction, which may cause reduced traction and stability control.

C3918 Medium

C3918: Traction Control System Malfunction

The traction control system has malfunctioned, likely due to a faulty wheel speed sensor or a problem with the traction control module.

C3919 Medium

C3919: Wheel Speed Sensor Malfunction

The wheel speed sensor malfunction code C3919 indicates a problem with the wheel speed sensor circuit, which is used to monitor the vehicle's speed and traction control system.

C3920 Medium

C3920: ABS System Malfunction

The ABS system has malfunctioned, likely due to a faulty wheel speed sensor or a problem with the ABS module.

C3921 Medium

C3921: Brake System Pressure Sensor Circuit Malfunction

The brake system pressure sensor circuit has malfunctioned, causing the brake system to malfunction.

C3922 Medium

C3922: Rear Suspension Strut Friction Bushing Fault

The C3922 code indicates a fault in the rear suspension strut friction bushing, which can cause uneven tire wear, vibrations, and reduced ride quality.

C3923 Medium

C3923: Electric Power Steering (EPS) System Fault

The C3923 code indicates a fault in the Electric Power Steering (EPS) system, which may cause the steering to become difficult or unresponsive.

C3924 Medium

C3924: Electronic Stability Control (ESC) Malfunction

The Electronic Stability Control (ESC) system has detected a malfunction, which may cause reduced traction and stability control.

C3925 Medium

C3925: Traction Control System Malfunction

The traction control system has detected a malfunction, likely due to a faulty wheel speed sensor or a problem with the traction control module.

C3926 Medium

C3926: Wheel Speed Sensor Malfunction

The wheel speed sensor malfunction code indicates a problem with the wheel speed sensor circuit, which can cause issues with the vehicle's anti-lock braking system (ABS) and traction control system.

C3927 Medium

C3927: ABS System Malfunction

The ABS system has malfunctioned, likely due to a faulty wheel speed sensor or a problem with the ABS module.

C3928 Medium

C3928: Brake System Malfunction

This code indicates a malfunction in the brake system, possibly due to a faulty brake sensor, faulty brake switch, or a problem with the brake fluid level.

C3929 Medium

C3929: Left Front Suspension Strut Friction Bushing Fault

This code indicates a faulty left front suspension strut friction bushing, which can cause uneven tire wear, vibration, and noise while driving.

C3930 Medium

C3930: Electric Power Steering (EPS) System Fault

The C3930 code indicates a fault in the Electric Power Steering (EPS) system, which may cause the vehicle's steering to become difficult or unresponsive.

C3931 Medium

C3931: Electronic Stability Control (ESC) Malfunction

The Electronic Stability Control (ESC) system has detected a malfunction, which may cause the vehicle to lose traction or stability.

C3932 Medium

C3932: Traction Control System Malfunction

The traction control system has detected a malfunction, likely due to a faulty wheel speed sensor or a problem with the traction control module.

C3933 Medium

C3933: Wheel Speed Sensor Malfunction

The wheel speed sensor malfunction code C3933 indicates a problem with the wheel speed sensor circuit, which is used to monitor the speed of the vehicle's wheels. This code is often triggered by a faulty sensor, wiring issue, or a problem with the sensor's electrical connection.

C3934 High

C3934: ABS System Malfunction

The ABS system has detected a malfunction in the wheel speed sensor circuit, which may cause the ABS system to malfunction or not function at all.

C3935 Medium

C3935: Brake System Pressure Sensor Circuit Malfunction

The brake system pressure sensor circuit has malfunctioned, indicating a problem with the brake system's ability to regulate pressure.

C3936 Medium

C3936: Rear Suspension Strut Mount Fracture

This code indicates a fracture in the rear suspension strut mount, which can cause uneven tire wear, vibrations, and reduced handling.

C3937 Medium

C3937: Electric Power Steering (EPS) System Fault

The C3937 code indicates a fault in the Electric Power Steering (EPS) system, which may cause the steering to become difficult or unresponsive.

C3938 Medium

C3938: Electronic Stability Control (ESC) Malfunction

The Electronic Stability Control (ESC) system has detected a malfunction, which may cause reduced traction and stability control.

C3939 Medium

C3939: Traction Control System Malfunction

The traction control system has detected a malfunction, which may be caused by a faulty wheel speed sensor, a problem with the traction control module, or a wiring issue.

C3940 Medium

C3940: Wheel Speed Sensor Malfunction

The wheel speed sensor malfunction code C3940 indicates a problem with the wheel speed sensor circuit, which monitors the speed of the vehicle's wheels and sends the data to the vehicle's computer.

C3941 Medium

C3941: ABS System Malfunction

The ABS system has detected a malfunction in the wheel speed sensor circuit, which may cause the ABS system to malfunction or not function at all.

C3942 Medium

C3942: Brake System Pressure Sensor Circuit Malfunction

The brake system pressure sensor circuit has malfunctioned, causing the brake system to malfunction and trigger this code.

C3943 Medium

C3943: Left Rear Suspension Strut Friction Bushing Fault

The C3943 code indicates a fault in the left rear suspension strut friction bushing, which can cause uneven tire wear, vibration, and reduced handling.

C3944 Medium

C3944: Electric Power Steering (EPS) System Fault

The C3944 code indicates a fault in the Electric Power Steering (EPS) system, which may cause the steering to become difficult or unresponsive.

C3945 Medium

C3945: Electronic Stability Control (ESC) Malfunction

The Electronic Stability Control (ESC) system has detected a malfunction, which may cause reduced traction and stability control.

C3946 Medium

C3946: Traction Control System Malfunction

The traction control system has detected a malfunction, likely due to a faulty wheel speed sensor or a problem with the traction control module.

C3947 Medium

C3947: Wheel Speed Sensor Malfunction

The wheel speed sensor malfunction code indicates that the vehicle's anti-lock braking system (ABS) or traction control system (TCS) has detected an issue with one or more wheel speed sensors.

C3948 High

C3948: ABS System Malfunction

The ABS system has detected a malfunction in the wheel speed sensor circuit, which may cause the ABS system to malfunction or not function at all.

C3949 Medium

C3949: Brake System Pressure Sensor Circuit Malfunction

The brake system pressure sensor circuit has malfunctioned, causing the brake system to malfunction. This can cause the brake pedal to feel spongy or soft.

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