B1140 Malfunction in the right side airbag sensor assembly. The side airbag sensor signal is not reliable

What does B1140 mean on a Toyota?

B1140. Malfunction in the right side airbag sensor assembly. The side airbag sensor signal is not reliable. This Toyota-enhanced code applies to Toyota, Lexus and Scion models that use this code.

Common causes of B1140

• Open or short in the right side airbag sensor circuit
• Loose or corroded connector at the right side airbag sensor assembly
• Damaged harness between the airbag sensor center and the right side airbag sensor assembly
• Failed right side airbag sensor assembly
• Faulty airbag sensor assembly center

How to fix B1140

1. Disconnect the battery and wait before touching SRS wiring
2. Confirm the code with an SRS-capable scanner and read freeze frame
3. Inspect and reseat the right side airbag sensor assembly connector
4. Test the right side airbag sensor circuit for opens, shorts and resistance
5. Replace the right side airbag sensor assembly only after the circuit tests fail