Diagnostics

Understand the code before replacing a part.

Search generic SAE-style OBD-II trouble codes imported from OBDex. Results explain a monitored condition—not a guaranteed failed component.

B0001

Driver Frontal Stage 1 Deployment Control

The supplemental restraint system (SRS) module has detected a fault in the deployment control circuit for the first stage of the driver frontal airbag. The SRS warning lamp illuminates and airbag deployment may be impaired in a crash event.

B0002

Driver Frontal Stage 2 Deployment Control

The SRS module has detected a fault in the deployment control circuit for the second stage of the driver frontal airbag. Dual-stage airbags use two charges for severity-dependent deployment — this code indicates the high-severity stage cannot be triggered reliably.

B0003

Driver Frontal Deployment Loop Resistance Low

The SRS module has detected that the resistance in the driver frontal airbag deployment loop is below the expected range, suggesting a short or partial short between the squib leads. The airbag warning lamp is illuminated.

B0004

Driver Frontal Deployment Loop Resistance High

The SRS module measured a higher than expected resistance in the driver frontal airbag deployment circuit. Causes include a partially open connection, corroded contacts, or a damaged clock spring conductor.

B0005

Driver Frontal Deployment Loop Open

The SRS module detects an open circuit in the driver frontal airbag deployment loop. The airbag will not deploy in a crash and the SRS warning lamp is illuminated.

B0006

Driver Frontal Deployment Loop Short to Ground

One of the deployment leads for the driver frontal airbag is shorted to ground. The SRS module disables deployment of the affected stage to prevent unintended firing.

B0007

Driver Frontal Deployment Loop Short to Battery

The driver frontal airbag deployment loop is shorted to battery voltage. This is potentially dangerous as it could cause unintended deployment; the SRS module isolates the circuit and sets the warning lamp.

B0010

Right Front/Passenger Frontal Deployment Control

Right Front/Passenger Frontal Deployment Control: the restraints module has detected a fault in this airbag/pretensioner deployment circuit, which may prevent correct deployment in a crash. Safety-critical.

B0011

Right Front/Passenger Frontal Stage 2 Deployment Control

Right Front/Passenger Frontal Stage 2 Deployment Control: the restraints module has detected a fault in this airbag/pretensioner deployment circuit, which may prevent correct deployment in a crash. Safety-critical.

B0012

Right Front/Passenger Frontal Stage 2 Deployment Control

The SRS module has detected a fault in the second-stage deployment circuit of the front passenger airbag. The dual-stage charge cannot be triggered as designed and the airbag warning lamp is illuminated.

B0013

Passenger Knee Bolster Deployment Control

Fault on the deployment control circuit of the passenger knee airbag (knee bolster). Restricts lower-body motion of the passenger in a frontal collision.

B0014

Driver Knee Airbag Deployment Control

The SRS module has detected a fault in the driver knee airbag deployment control circuit. The knee airbag may not deploy in a crash event.

B0015

Passenger Knee Airbag Deployment Control

The SRS module has detected a fault in the passenger knee airbag deployment control circuit. Same fault profile as B0014 but for the passenger side.

B0016

Right Front/Passenger Frontal Deployment Loop Short to Ground

The SRS module detected a short to ground in the front passenger airbag deployment circuit. Deployment of the affected stage is inhibited and the warning lamp is illuminated.

B0017

Right Front/Passenger Frontal Deployment Loop Short to Battery

The front passenger airbag deployment loop is shorted to battery voltage, creating a risk of unintended deployment. The SRS module disables the circuit and stores this fault.

B0018

Right Front/Passenger Frontal Deployment Loop Resistance High

The SRS module measures a higher than expected resistance in the passenger frontal deployment loop, indicating partial corrosion or damage. The airbag may not deploy reliably.

B0019

Right Front/Passenger Frontal Deployment Loop Resistance Low

The SRS module detects too low a resistance in the front passenger airbag deployment loop, suggesting a partial short. Deployment of that stage is inhibited.

B001A

Center Frontal Stage 3 Deployment Control

Fault on the deployment circuit of the center frontal airbag, deployment stage 3 (highest severity). Used in dual or triple-stage front airbag systems for severe crash energy.

B0020

Left Side Deployment Control

Left Side Deployment Control: the restraints module has detected a fault in this airbag/pretensioner deployment circuit, which may prevent correct deployment in a crash. Safety-critical.

B0021

Left Side Deployment Stage 1 Control

The SRS module has detected a fault in the deployment control circuit for the left side (driver) airbag stage 1. Side impact protection on the driver side may be reduced.

B0022

Left Side Deployment Stage 1 Loop Open

An open circuit has been detected in the deployment loop for the left side airbag stage 1. The airbag will not fire and the SRS lamp is illuminated.

B0023

Left Side Deployment Stage 1 Loop Short to Ground

The left side airbag stage 1 deployment loop is shorted to ground. Deployment is inhibited and the SRS warning lamp is on.

B0024

Right Side Deployment Control

Right Side Deployment Control: the restraints module has detected a fault in this airbag/pretensioner deployment circuit, which may prevent correct deployment in a crash. Safety-critical.

B0025

Left Side Deployment Stage 2 Control

A fault is detected in the deployment control for the second stage of the left side airbag, used in vehicles with two-stage side restraint systems.

B0026

Left Side Deployment Stage 2 Loop Open

An open circuit is present in the second-stage deployment loop of the left side airbag.

B0028

Driver Side Curtain Air Bag Deployment Control

Driver Side Curtain Air Bag Deployment Control: the restraints module has detected a fault in this airbag/pretensioner deployment circuit, which may prevent correct deployment in a crash. Safety-critical.

B0029

Right Side Curtain Air Bag Deployment Control

Right Side Curtain Air Bag Deployment Control: the restraints module has detected a fault in this airbag/pretensioner deployment circuit, which may prevent correct deployment in a crash. Safety-critical.

B002A

Right Curtain Deployment Control 2

Fault on the second deployment circuit of the right side curtain airbag. Curtain airbags deploy along the side glass to protect head and neck in a side or rollover crash.

B0030

Driver Side Curtain Airbag Stage 2

The SRS module has detected a fault in the driver-side curtain airbag stage 2 deployment circuit. Two-stage curtain airbags use a second charge for severe lateral impacts.

B0031

Passenger Side Curtain Airbag Stage 2

The SRS module has detected a fault in the passenger-side curtain airbag stage 2 deployment circuit. Same fault profile as B0030 but for the passenger side.

Source: OBDex generic dataset (CC0-1.0). Manufacturer-specific codes are not inferred.