All OBD2 Diagnostic Codes
Browse our complete database of 16000 diagnostic trouble codes.
B0500: Seat Position Sensor Fault
The B0500 code indicates a fault in the seat position sensor, which monitors the position and movement of the seat. This fault can cause issues with seat adjustment, warning lights on the dashboard, and potentially affect airbag deployment.
B0501: Intermittent or Inoperative Headlight
This code indicates a problem with the headlight circuit, such as a faulty headlight switch, a short circuit, or a malfunctioning headlight relay.
B0502: Body System Security Malfunction
This code indicates a malfunction in the vehicle's security system, which may prevent the vehicle from starting or cause other issues.
B0503: Audio System Malfunction
The B0503 code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B0504: Airbag System Fault
The B0504 code indicates a fault in the airbag system, which may prevent the airbags from deploying in the event of a crash.
B0505: Climate Control Fan Motor Fault
The B0505 code indicates a fault in the climate control fan motor circuit, which may cause issues with air flow and temperature regulation.
B0506: Door Locks Actuator Malfunction
The B0506 code indicates a malfunction in the door lock actuator, which is responsible for locking and unlocking the doors. This code is usually triggered when the actuator is faulty or stuck.
B0507: Power Window Circuit Malfunction
The B0507 code indicates a malfunction in the power window circuit, which can cause the windows to malfunction or not function at all.
B0508: 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 movement.
B0509: Intermittent Turn Signal Malfunction
This code indicates a problem with the turn signal system, specifically with the flasher unit or wiring. The turn signals may flash erratically or not at all.
B0510: Body System Security Malfunction
The B0510 code indicates a malfunction in the vehicle's security system, which may cause issues with door locks, alarm systems, or other security-related functions.
B0511: Audio System Fault
The B0511 code indicates a fault in the audio system, such as a malfunctioning amplifier, speaker, or wiring issue.
B0512: Airbag System Fault
The airbag system has detected a fault, which may prevent the airbags from deploying in the event of a crash. This code is typically set when there is a problem with the airbag sensor or wiring.
B0513: 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.
B0514: Door Locks Actuator Malfunction
The B0514 code indicates a malfunction in the door lock actuator, which may cause the doors to lock or unlock unexpectedly, or not function at all.
B0515: Power Window Regulator Malfunction
The B0515 code indicates a problem with the power window regulator, which controls the movement of the window up and down. This code is often accompanied by symptoms such as slow or stuck windows, or windows that do not respond to the switch.
B0516: Seat Position Sensor Circuit Malfunction
The seat position sensor circuit has malfunctioned, preventing the vehicle's computer from accurately detecting the seat's position. This can cause issues with seat adjustments, airbag deployment, and other safety features.
B0517: Exterior Lighting System Malfunction
The B0517 code indicates a malfunction in the exterior lighting system, such as the headlights, taillights, or turn signals.
B0518: Body System Code - Security System Malfunction
The B0518 code indicates a malfunction in the vehicle's security system, which may cause the alarm to trigger unnecessarily or not trigger at all.
B0519: Audio System Malfunction
The B0519 code indicates a malfunction in the audio system, likely due to a faulty amplifier, speaker, or wiring issue.
B0520: Airbag System Malfunction
The airbag system has detected a malfunction, which may prevent the airbags from deploying properly in the event of a crash.
B0521: Climate Control Fan Motor Malfunction
This code indicates a malfunction in the climate control fan motor, which may cause issues with airflow and temperature regulation in the vehicle.
B0522: Door Locks Malfunction
The B0522 code indicates a malfunction in the door lock system, preventing proper locking or unlocking of the doors.
B0523: Power Window Relay Circuit Malfunction
The B0523 code indicates a malfunction in the power window relay circuit, which can cause windows to malfunction or not function at all.
B0524: Seat Switch Circuit Malfunction
The B0524 code indicates a malfunction in the seat switch circuit, which controls the movement and position of the vehicle's seats.
B0525: Body System Code - Lighting
This code indicates a malfunction in the vehicle's lighting system, such as a faulty headlight, taillight, or turn signal.
B0526: Immobilizer System Malfunction
The immobilizer system has malfunctioned, preventing the vehicle from starting or running properly. This code is usually caused by a faulty immobilizer sensor, antenna, or key fob.
B0527: Audio System Fault
This code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B0528: Airbag System Fault
The airbag system has detected a fault in the deployment mechanism, which may be due to a faulty sensor, wiring issue, or software problem.
B0529: Climate Control Air Temperature Sensor Circuit Malfunction
The B0529 code indicates a malfunction in the air temperature sensor circuit, which is responsible for monitoring the temperature of the air entering the climate control system. This malfunction can cause the climate control system to malfunction or not function at all.
B0530: Door Locks Actuator Malfunction
The B0530 code indicates a malfunction in the door lock actuator, which controls the locking and unlocking of the doors. This code is usually triggered when the actuator is not functioning properly, causing issues with door locking or unlocking.
B0531: Power Window Motor Circuit Malfunction
The power window motor circuit has malfunctioned, preventing the window from operating properly.
B0532: Seat Switch Circuit Malfunction
The seat switch circuit has malfunctioned, preventing the seat from functioning properly. This code is often accompanied by other related codes, such as B0531.
B0533: Turn Signal Indicator Malfunction
The B0533 code indicates a malfunction in the turn signal indicator circuit, which can cause the turn signal lights to malfunction or not function at all.
B0534: Immobilizer System Malfunction
The immobilizer system has malfunctioned, preventing the vehicle from starting. This code indicates a problem with the immobilizer system's communication with the engine control module.
B0535: Audio System Fault
The B0535 code indicates a malfunction in the audio system, such as a faulty amplifier, speaker, or wiring issue.
B0536: Airbag System Malfunction
The airbag system has detected a malfunction, which may be caused by a faulty sensor, wiring issue, or other component failure.
B0537: Climate Control Fan Motor Fault
The B0537 code indicates a malfunction in the climate control fan motor, which may be due to a faulty motor, wiring issue, or a problem with the fan speed control module.
B0538: Door Lock Actuator Malfunction
The Body Control Module (BCM) has detected a malfunction in the door lock actuator circuit, preventing the door locks from functioning properly.
B0539: Power Window Regulator Fault
The B0539 code indicates a problem with the power window regulator, which controls the movement of the window up and down. This code is often accompanied by symptoms such as slow or stuck windows, or windows that do not move at all.
B0540: Seat Position Sensor Circuit Malfunction
The B0540 code indicates a malfunction in the seat position sensor circuit, which is responsible for monitoring the driver's seat position and adjusting the seat belt tensioner accordingly.
B0541: Exterior Lighting Malfunction
This code indicates a malfunction in the exterior lighting system, such as the headlights, taillights, or brake lights.
B0542: Immobilizer System Malfunction
The immobilizer system has detected an error, which may be due to a faulty immobilizer module, incorrect key, or wiring issue.
B0543: Audio System Malfunction
The B0543 code indicates a malfunction in the audio system, possibly due to a faulty amplifier, speaker, or wiring issue.
B0544: Airbag System Sensor Circuit Malfunction
The airbag system sensor circuit has malfunctioned, causing the airbag system to malfunction or not deploy properly in the event of a crash.
B0545: Climate Control Fan Motor Malfunction
This code indicates a malfunction in the climate control fan motor, which may cause the fan to stop working or operate erratically.
B0546: Door Locks Actuator Circuit Malfunction
The B0546 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.
B0547: Power Window Relay Circuit Malfunction
The B0547 code indicates a malfunction in the power window relay circuit, which controls the operation of the windows. This code is often triggered by a faulty relay, wiring issue, or a problem with the window switch.
B0548: Seat Position Sensor Circuit Malfunction
The seat position sensor circuit has malfunctioned, preventing the seat from adjusting properly. This code is usually triggered when the sensor detects an incorrect seat position or when there's a problem with the electrical connection.
B0549: Front Turn Signal Lamp Circuit Malfunction
The B0549 code indicates a malfunction in the front turn signal lamp circuit, which may cause the turn signals to malfunction or not function at all.