All OBD2 Diagnostic Codes
Browse our complete database of 16000 diagnostic trouble codes.
B3900: Seat Position Sensor Malfunction
The seat position sensor has malfunctioned, preventing the vehicle's computer from accurately detecting the seat's position, which can cause issues with seat adjustments, airbag deployment, and other safety features.
B3901: Exterior Lighting Malfunction
The B3901 code indicates a malfunction in the exterior lighting system, such as the headlights, taillights, or turn signals.
B3902: Immobilizer System Malfunction
The immobilizer system has detected a malfunction, preventing the vehicle from starting. This code is typically set when the immobilizer system is not functioning correctly, preventing the vehicle from starting.
B3903: Audio System Malfunction
This code indicates a malfunction in the audio system, such as faulty speakers, amplifier, or wiring issues.
B3904: Airbag System Fault
The airbag system has detected a fault, which may be due to a malfunctioning sensor, wiring issue, or faulty airbag module.
B3905: Climate Control Fan Motor Malfunction
The B3905 code indicates a malfunction in the climate control fan motor, which may cause the fan to stop working or operate erratically.
B3906: Door Locks Actuator Malfunction
The B3906 code indicates a malfunction in the door lock actuator, which may cause issues with door locking and unlocking functions.
B3907: Power Window Regulator Malfunction
The power window regulator is malfunctioning, preventing the window from moving up or down properly.
B3908: Seat Position Sensor Malfunction
The seat position sensor has failed or is malfunctioning, preventing the vehicle's computer from accurately detecting the seat's position.
B3909: Exterior Lighting Malfunction
This code indicates a problem with the exterior lighting system, such as a faulty headlight, taillight, or turn signal.
B3910: Immobilizer System Malfunction
The immobilizer system has detected a malfunction, preventing the vehicle from starting. This code is typically set when the immobilizer system is not functioning correctly, preventing the vehicle from starting.
B3911: Audio System Malfunction
The B3911 code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B3912: Airbag System Fault
The airbag system has detected a fault, which may be due to a malfunctioning sensor, wiring issue, or faulty airbag module.
B3913: Climate Control Blower Motor Malfunction
The B3913 code indicates a malfunction in the climate control blower motor, which may cause issues with airflow and temperature regulation.
B3914: Door Locks Actuator Malfunction
The B3914 code indicates a malfunction in the door lock actuator, which may cause issues with door locking and unlocking functions.
B3915: Power Window Regulator Malfunction
The power window regulator is malfunctioning, preventing the window from moving up or down properly.
B3916: Seat Position Sensor Circuit Malfunction
The seat position sensor circuit has malfunctioned, preventing the vehicle's computer from accurately monitoring the seat's position and movement.
B3917: Exterior Lighting Malfunction
This code indicates a problem with the exterior lighting system, such as a faulty headlight, taillight, or turn signal.
B3918: Body System Security Malfunction
The body control module (BCM) has detected a security-related issue, such as a tamper attempt or a malfunction in the security system.
B3919: Audio System Malfunction
The B3919 code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B3920: Airbag System Malfunction
The airbag system has detected a malfunction, which may be caused by a faulty sensor, wiring issue, or software problem.
B3921: Climate Control Temperature Sensor Malfunction
The climate control system has detected a malfunction in the temperature sensor, which may be causing inaccurate temperature readings or failure to maintain a set temperature.
B3922: Door Locks Malfunction
The B3922 code indicates a malfunction in the door lock system, which may cause issues with locking or unlocking doors, or even prevent doors from locking or unlocking properly.
B3923: Power Window Regulator Malfunction
The power window regulator has failed, preventing the window from moving up or down properly.
B3924: Seat Position Sensor Malfunction
The seat position sensor has failed to send a signal to the vehicle's computer, indicating a problem with the seat's position or movement.
B3925: Exterior Lighting Malfunction
This code indicates a problem with the exterior lighting system, such as a faulty headlight, taillight, or brake light.
B3926: Immobilizer System Malfunction
The immobilizer system has detected a malfunction, preventing the vehicle from starting. This code is typically set when the immobilizer system is not functioning correctly, preventing the vehicle from starting.
B3927: Audio System Malfunction
This code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B3928: Airbag System Fault
The airbag system has detected a fault, which may be due to a malfunctioning sensor, wiring issue, or faulty airbag module.
B3929: Climate Control Malfunction
This code indicates a malfunction in the climate control system, possibly due to a faulty temperature sensor, clogged air ducts, or a malfunctioning blower motor.
B3930: Door Locks Malfunction
The B3930 code indicates a malfunction in the door lock system, which may cause the doors to lock or unlock unexpectedly, or fail to lock or unlock at all.
B3931: Power Window Regulator Malfunction
The power window regulator is malfunctioning, preventing the window from moving properly. This code is often accompanied by a warning light on the dashboard.
B3932: Seat Position Sensor Circuit Malfunction
The seat position sensor circuit has malfunctioned, preventing the vehicle's computer from accurately monitoring the seat's position and movement.
B3933: Exterior Lighting Malfunction
This code indicates a problem with the exterior lighting system, such as a faulty headlight, taillight, or turn signal.
B3934: Immobilizer System Malfunction
The immobilizer system has detected a malfunction, preventing the vehicle from starting or running. This code is typically set when the immobilizer system is not functioning correctly, preventing the vehicle from starting.
B3935: Audio System Malfunction
The B3935 code indicates a malfunction in the audio system, likely due to a faulty amplifier, speaker, or wiring issue.
B3936: Airbag System Fault
The airbag system has detected a fault, which may be due to a malfunctioning sensor, wiring issue, or faulty airbag module.
B3937: Climate Control Temperature Sensor Malfunction
The B3937 code indicates a malfunction in the climate control temperature sensor, which is responsible for monitoring the temperature of the air entering the vehicle's cabin.
B3938: Door Locks Malfunction
The B3938 code indicates a malfunction in the door lock system, which may cause the doors to malfunction or not lock/unlock properly.
B3939: Power Window Regulator Malfunction
The power window regulator is malfunctioning, preventing the window from moving up or down properly.
B3940: Seat Position Sensor Malfunction
The seat position sensor is malfunctioning, preventing the vehicle's computer from accurately detecting the seat's position, which can cause issues with seat adjustments and potentially affect airbag deployment.
B3941: Exterior Lighting Malfunction
The B3941 code indicates a malfunction in the exterior lighting system, such as the headlights, taillights, or turn signals.
B3942: Immobilizer System Malfunction
The immobilizer system has detected a malfunction, preventing the vehicle from starting. This code is typically set when the immobilizer system is not functioning correctly, preventing the vehicle from starting.
B3943: Audio System Fault
The B3943 code indicates a fault in the audio system, possibly due to a malfunctioning amplifier, speaker, or wiring issue.
B3944: Airbag System Fault
The airbag system has detected a fault, which may be due to a malfunctioning sensor, wiring issue, or faulty airbag module.
B3945: Climate Control Fan Motor Malfunction
The climate control fan motor is malfunctioning, causing the fan to not turn on or turn off properly.
B3946: Door Locks Actuator Malfunction
The door locks actuator is malfunctioning, preventing the doors from locking or unlocking properly.
B3947: Power Window Relay Circuit Malfunction
The power window relay circuit has malfunctioned, preventing the windows from functioning properly.
B3948: Seat Position Sensor Malfunction
The seat position sensor has malfunctioned, preventing the vehicle's computer from accurately detecting the seat's position, which can cause issues with seat adjustments and potentially affect airbag deployment.
B3949: Exterior Lighting Malfunction
This code indicates a problem with the exterior lighting system, such as a faulty headlight, taillight, or turn signal.