B0090 Code - Left Frontal Restraints Sensor 1
Quick Answer
The Restraints Control Module (RCM) monitors all of Supplemental Restraint System (SRS) device connections. Common causes include Faulty Left Frontal Restraints Sensor, Left Frontal Restraints Sensor harness is open or shorted, Left Frontal Restraints Sensor circuit poor electrical connection. 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
- B0090 indicates Left Frontal Restraints Sensor 1.
- Common causes
- Common causes include Faulty Left Frontal Restraints Sensor, Left Frontal Restraints Sensor harness is open or shorted, Left Frontal Restraints Sensor circuit poor electrical connection.
- 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.
Code B0090 Description
What are the Possible Causes of the DTC B0090?
- Faulty Left Frontal Restraints Sensor
- Left Frontal Restraints Sensor harness is open or shorted
- Left Frontal Restraints Sensor circuit poor electrical connection
How to Fix the DTC B0090?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the B0090 code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Information for Specific Makes
- B0090 Buick — Rollover Sensor Erratic
- B0090 Cadillac — Rollover Sensor Erratic
- B0090 Chevrolet — Rollover Sensor Erratic
- B0090 Ford — Left Frontal Restraints Sensor 1
- B0090 GMC — Rollover Sensor Erratic
- B0090 Lincoln — Left Frontal Restraints Sensor 1
- B0090 Mercury — Left Frontal Restraints Sensor 1
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.
Frequently Asked Questions about B0090 Code
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