B0091:02 Code - Center Front Impact Sensor Short to Ground
Quick Answer
The B0091:02 diagnostic trouble code indicates that there is a short to ground in the center front impact sensor circuit. Common causes include Wiring harness damage or corrosion, Faulty center front impact sensor, Short circuit in the sensor circuit. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- B0091:02 indicates Center Front Impact Sensor Short to Ground.
- Common causes
- Common causes include Wiring harness damage or corrosion, Faulty center front impact sensor, Short circuit in the sensor circuit.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code B0091:02 Description
The B0091:02 diagnostic trouble code indicates that there is a short to ground in the center front impact sensor circuit. The center front impact sensor is a crucial component of the vehicle's safety system, as it is responsible for detecting a collision or impact to deploy the airbags and other safety features. A short to ground in this sensor can prevent it from functioning properly, potentially leading to a failure in deploying the airbags during a collision.
Common Causes of B0091:02
- Wiring harness damage or corrosion.
- Faulty center front impact sensor.
- Short circuit in the sensor circuit.
- Poor electrical connection in the sensor circuit.
- Water intrusion into the sensor causing a short to ground.
Symptoms of B0091:02
- Airbag warning light illuminated on the dashboard.
- Airbags not deploying during a collision.
- Inaccurate or intermittent airbag deployment.
- Vehicle fails safety inspection due to airbag system malfunction.
How to Fix B0091:02
- Begin by diagnosing the exact location of the short to ground in the center front impact sensor circuit using a multimeter.
- Inspect the wiring harness for any damage, corrosion, or signs of wear. Repair or replace any damaged wiring.
- Test the center front impact sensor for proper functionality. Replace the sensor if it is faulty.
- Check for any loose or poor electrical connections in the sensor circuit. Ensure all connections are secure and clean.
- Clear the diagnostic trouble code from the vehicle's system and test the airbag system to ensure proper deployment.
Cost to Fix B0091:02
The typical repair costs for addressing a B0091:02 code can range from $200 to $500, including parts and labor. However, the specific diagnosis time and labor rates at auto repair shops can vary based on factors such as location, vehicle make and model, and engine type. It is advisable to check local rates for a more precise estimate. Keep in mind that rates in metropolitan areas or at dealerships may be higher, while independent shops often charge less.
Tech Notes for B0091:02
B0091:02 Center Front Impact Sensor Short to Ground
B0091:05 Center Front Impact Sensor Short to Battery or Open
B0091:0F Center Front Impact Sensor Erratic
B0091:39 Center Front Impact Sensor Internal Electronic Failure
B0091:3A Center Front Impact Sensor Incorrect Component Installed
B0091:71 Center Front Impact Sensor Invalid Serial Data Received
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Precautions for SRS “AIR BAG” and “SEAT BELT PRE-TENSIONER” Service
- Never probe the electrical connectors on air bag, side air curtain modules or seat belts.
- Never disassemble or tamper with safety belt buckle/retractor pretensioners, adaptive load limiting retractors, safety belt inflators, or probe the electrical connectors.
- Do not use electrical test equipment to check SRS circuits unless instructed to in this Service Manual.
- Before servicing the SRS, turn ignition switch OFF, disconnect both battery cables and wait at least 3 minutes. For approximately 3 minutes after the cables are removed, it is still possible for the air bag and seat belt pre-tensioner to deploy. Therefore, do not work on any SRS connectors or wires until at least 3 minutes have passed.
Failure to follow this instruction may result in the accidental deployment of these modules, which increases the risk of serious personal injury or death.
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