B0090Airbag/SRS
Left Impact Sensor Fault
B0090 indicates a fault with the left front impact (satellite) sensor used by the SRS module. The sensor signal is missing or out of range.
🚗 Yes, but left-side airbag timing may be affected, so address it promptly.
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🎯 Top Causes, Ranked by Likelihood
#1Faulty left impact sensor$100-$400
The left satellite sensor fails or is damaged.
#2Corroded sensor connector$0-$150
The front-mounted connector corrodes and drops the signal.
#3Damaged sensor wiring$100-$400
Front-end impact or debris breaks the wiring.
🩺 Common Symptoms
- Airbag/SRS warning light on
- Left airbags may deploy incorrectly
- Fault after left front impact
- Stored sensor code
💰 Repair Cost: DIY vs Shop
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🔧 How to Diagnose B0090
1Disarm the SRS system per the service manual
2Inspect the left sensor connector for corrosion
3Check the wiring for damage
4Replace the sensor if wiring checks out
❓ Frequently Asked Questions
Where is the sensor for B0090?
Usually at the left front of the vehicle behind the bumper or fender.
Can I drive with B0090?
Yes, but left airbag detection may be impaired, so fix it soon.
What causes B0090?
A failed left impact sensor or a corroded connector.
🔗 Related Codes
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