B0091:71 Code - Center Front Impact Sensor Invalid Serial Data Received
Quick Answer
The B0091:71 diagnostic trouble code indicates that the center front impact sensor in the vehicle has detected invalid serial data. Common causes include Faulty center front impact sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to sensor connectors. 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
- B0091:71 indicates Center Front Impact Sensor Invalid Serial Data Received.
- Common causes
- Common causes include Faulty center front impact sensor, Wiring or connection issues in the sensor circuit, Corrosion or damage to sensor connectors.
- 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 B0091:71 Description
The B0091:71 diagnostic trouble code indicates that the center front impact sensor in the vehicle has detected invalid serial data. This sensor is responsible for detecting impacts to the front of the vehicle and sending this information to the vehicle's airbag control module. When the sensor detects invalid serial data, it can affect the proper deployment of the airbags in the event of a collision. This issue can compromise the safety of the vehicle occupants and should be addressed promptly.
Common Causes of B0091:71
- Faulty center front impact sensor
- Wiring or connection issues in the sensor circuit
- Corrosion or damage to sensor connectors
- Software issues in the airbag control module
- Impact or damage to the front of the vehicle affecting sensor functionality
Symptoms of B0091:71
- Airbag warning light illuminated on the dashboard
- Airbags may not deploy in a collision
- Inaccurate airbag deployment
- Vehicle may fail airbag system self-test
- Loss of communication with the airbag control module
How to Fix B0091:71
- Begin by diagnosing the specific cause of the invalid serial data received by the center front impact sensor using a scan tool.
- Inspect the sensor, wiring, and connectors for any visible damage or corrosion. Repair or replace as needed.
- Clear the diagnostic trouble codes from the vehicle's system and perform a reset to see if the issue reoccurs.
- Test the sensor to ensure it is transmitting valid data to the airbag control module.
- If the issue persists, consider replacing the center front impact sensor to ensure proper functioning of the airbag system.
Cost to Fix B0091:71
The cost of repairing a center front impact sensor invalid serial data received code can vary depending on the specific cause of the issue and the vehicle make and model. Typically, the cost of parts for a new sensor can range from $100 to $300, while labor costs can range from $100 to $200. Overall, the total repair cost could be anywhere from $200 to $500. It's important to consult with a professional mechanic to get an accurate estimate based on your vehicle's specific needs. Labor rates at auto repair shops can vary, so it's advisable to check local rates for a more precise estimate.
Tech Notes for B0091:71
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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