All OBD2 Diagnostic Codes
Browse our complete database of 16000 diagnostic trouble codes.
B0300: Seat Switch Circuit Malfunction
The B0300 code indicates a problem with the seat switch circuit, which controls the seat's position, lumbar support, and other functions. This code can occur when there is an issue with the seat switch, wiring, or the body control module.
B0301: Body System Code - Low Beam Headlight Relay Circuit Malfunction
The B0301 code indicates a malfunction in the low beam headlight relay circuit, which can cause the low beam headlights to malfunction or not function at all.
B0302: Immobilizer System Malfunction
The immobilizer system has detected a malfunction, preventing the vehicle from starting or running. This code is usually triggered by a faulty immobilizer module, a faulty key fob, or a problem with the communication between the immobilizer module and the engine control module.
B0303: Audio System Fault
The B0303 code indicates a fault in the audio system, which may cause issues with sound quality, volume, or functionality.
B0304: Airbag System Sensor Circuit Malfunction
The airbag system sensor circuit is malfunctioning, preventing the airbag from deploying properly in the event of an accident.
B0305: Climate Control Malfunction
This code indicates a problem with the climate control system, such as a faulty temperature sensor, a clogged air duct, or a malfunctioning blower motor.
B0306: Door Locks Actuator Circuit Malfunction
The B0306 code indicates a malfunction in the door locks actuator circuit, which controls the operation of the door locks. This can cause issues with locking and unlocking the doors.
B0307: Power Window Circuit Malfunction
The B0307 code indicates a malfunction in the power window circuit, which can cause the windows to malfunction or not function at all.
B0308: Seat Switch Circuit Malfunction
The B0308 code indicates a malfunction in the seat switch circuit, which controls the position and functionality of the vehicle's seats.
B0309: Low Beam Headlight Malfunction
The B0309 code indicates a problem with the low beam headlight circuit, which may be caused by a faulty headlight switch, relay, or wiring issue.
B0310: Security System Malfunction
The B0310 code indicates a malfunction in the vehicle's security system, which can prevent the vehicle from starting or cause other security-related issues.
B0311: Audio System Malfunction
The B0311 code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B0312: Airbag System Sensor Circuit Malfunction
The B0312 code indicates a malfunction in the airbag system sensor circuit, which can prevent the airbags from deploying in the event of an accident.
B0313: Climate Control Temperature Sensor Malfunction
The B0313 code indicates a malfunction in the climate control temperature sensor, which may cause the air conditioning or heating system to malfunction or not function at all.
B0314: Door Locks Actuator Circuit Malfunction
The B0314 code indicates a malfunction in the door locks actuator circuit, which controls the locking and unlocking of the doors. This can cause issues with door operation, such as failure to lock or unlock, or erratic behavior.
B0315: Power Window Motor Circuit Malfunction
This code indicates a problem with the power window motor circuit, which can cause windows to malfunction or not function at all.
B0316: Seat Position Sensor Circuit Malfunction
The seat position sensor circuit 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.
B0317: Interior Lighting Malfunction
The B0317 code indicates a problem with the interior lighting system, such as faulty bulbs, wiring issues, or a malfunctioning lighting control module.
B0318: Body Control Module (BCM) Security System Malfunction
The Body Control Module (BCM) has detected a security system malfunction, likely due to a faulty sensor or wiring issue.
B0319: Audio System Malfunction
The B0319 code indicates a malfunction in the audio system, which can cause issues with sound quality, volume control, or even complete loss of audio functionality.
B0320: Airbag System Internal Fault
The airbag system internal fault code indicates a problem with the airbag control module or its internal circuitry.
B0321: Climate Control Temperature Sensor Malfunction
This code indicates a malfunction in the climate control temperature sensor, which can cause the system to malfunction or not function at all.
B0322: Door Locks Actuator Fault
The B0322 code indicates a fault in the door lock actuator circuit, which prevents the door locks from functioning properly.
B0323: Power Window Relay Circuit Malfunction
The B0323 code indicates a problem with the power window relay circuit, which controls the operation of the windows. This can cause the windows to malfunction or not function at all.
B0324: 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.
B0325: Rear Turn Signal Lamp Malfunction
The B0325 code indicates a malfunction in the rear turn signal lamp circuit, which may cause the lamp to not function properly or not turn off when the turn signal is cancelled.
B0326: Security System Malfunction
The B0326 code indicates a malfunction in the vehicle's security system, which may cause issues with door locks, alarm systems, or other security-related functions.
B0327: Audio System Malfunction
The B0327 code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B0328: Airbag System Malfunction
The airbag system has detected a malfunction, possibly due to a faulty sensor, wiring issue, or software problem.
B0329: Climate Control Actuator Malfunction
The climate control system has detected a malfunction in the actuator, which is responsible for controlling the airflow and temperature in the vehicle.
B0330: Door Locks Actuator Malfunction
The B0330 code indicates a malfunction in the door lock actuator, which may cause the door locks to malfunction or not function at all.
B0331: Power Window Relay Circuit Malfunction
The power window relay circuit has malfunctioned, preventing the windows from functioning properly. This code is often accompanied by other related codes indicating issues with the window switches or motors.
B0332: Seat Position Sensor Circuit Malfunction
The seat position sensor circuit has malfunctioned, preventing the vehicle's computer from accurately detecting the position of the seat and/or seatback.
B0333: Exterior Lighting Malfunction
The B0333 code indicates a malfunction in the exterior lighting system, such as faulty headlights, taillights, or turn signals.
B0334: Immobilizer System Malfunction
The immobilizer system has malfunctioned, preventing the vehicle from starting or running. This code is typically set when the system detects an issue with the key fob, ignition switch, or immobilizer module.
B0335: Audio System Fault
The B0335 code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B0336: Airbag System - Deployment Sensor Circuit Malfunction
The airbag system has detected a malfunction in the deployment sensor circuit, which may prevent the airbags from deploying properly in the event of a crash.
B0337: Climate Control Fan Motor Malfunction
The B0337 code indicates a malfunction in the climate control fan motor, which may cause the fan to stop working or operate intermittently.
B0338: Door Locks Actuator Malfunction
The B0338 code indicates a malfunction in the door lock actuator, which prevents the door locks from functioning properly. This can cause issues with locking and unlocking the doors, and may also trigger the airbag system to deploy.
B0339: Power Window Relay Circuit Malfunction
The B0339 code indicates a problem with the power window relay circuit, which controls the operation of the windows. This can cause issues with window movement, such as slow or stuck windows.
B0340: Seat Position Sensor Circuit Malfunction
The seat position sensor circuit has malfunctioned, preventing the vehicle's computer from accurately detecting the seat's position and adjusting the airbag system accordingly.
B0341: Turn Signal Lamp Malfunction
The Body Control Module (BCM) has detected a malfunction in the turn signal lamp circuit, preventing the turn signal lights from functioning properly.
B0342: Immobilizer System Malfunction
The immobilizer system has detected a malfunction, preventing the engine from starting. This code is typically set when the immobilizer system is not functioning properly, preventing the vehicle from starting.
B0343: Audio System Malfunction
This code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B0344: Airbag System Circuit Short to Ground
The airbag system circuit has a short to ground, which can prevent the airbags from deploying in the event of a crash. This code is usually triggered by a faulty wiring harness or a damaged airbag module.
B0345: Climate Control Fan Motor Fault
This code indicates a fault in the climate control fan motor, which may be due to a faulty motor, wiring issue, or faulty climate control module.
B0346: Door Locks Actuator Circuit Malfunction
The B0346 code indicates a malfunction in the door locks actuator circuit, which may cause the door locks to malfunction or not function at all.
B0347: Power Window Regulator Malfunction
The power window regulator has failed, preventing the window from moving up or down properly.
B0348: Seat Switch Circuit Malfunction
The seat switch circuit has malfunctioned, preventing the seat from functioning properly. This code is usually triggered when the seat switch circuit is open or shorted.
B0349: Turn Signal Lamp Malfunction
The B0349 code indicates a malfunction in the turn signal lamp circuit, which may cause the turn signal lights to malfunction or not function at all.