The airbag light on my 2000 Avalon came on a few months ago. I read the code with an OBD scanner which showed B1140 corresponding to the right side airbag sensor. I cleared the code and all was well for a few months. Then over the past weekend the light came back on and I ended up reading the same code. I'm not sure how to approach this. Should I try and replace the sensor myself? If so, anyone know where it's located and how I can get to it? Much appreciated!
dimitrov
Here are the possible causes for code B1140:
My thought for help would be for you to obtain a side right airbag sensor assembly (part no. 89860-07020) from a salvage yard on a vehicle that doesn't look to have been in an accident and swap yours out with the used sensor and see if the problem doesn't return. If it does again, I would next move to replacing the center airbag sensor assembly (part no. 89170-07120 or 89170-07121, based upon when your Avalon was built) with a salvage used center airbag sensor assembly. Given you had a couple of months between getting this code B1140, I'm thinking the chance of a wiring problem causing this is low (unless your Avalon has been involved in an accident at some point in its life). Just my thoughts, would be good for others to offer their thoughts.
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- Faulty RH Side Airbag Sensor Assembly
- RH Side Airbag Assembly wiring harness is open or shorted
- RH Side Airbag Assembly poor electrical connection in circuit
- Faulty Center Airbag Sensor Assembly
My thought for help would be for you to obtain a side right airbag sensor assembly (part no. 89860-07020) from a salvage yard on a vehicle that doesn't look to have been in an accident and swap yours out with the used sensor and see if the problem doesn't return. If it does again, I would next move to replacing the center airbag sensor assembly (part no. 89170-07120 or 89170-07121, based upon when your Avalon was built) with a salvage used center airbag sensor assembly. Given you had a couple of months between getting this code B1140, I'm thinking the chance of a wiring problem causing this is low (unless your Avalon has been involved in an accident at some point in its life). Just my thoughts, would be good for others to offer their thoughts.
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