What are the Possible Causes of the Code B0131 Lexus?
Faulty Right Seat Belt Pretensioner
Right Seat Belt Pretensioner harness is open or shorted
Right Seat Belt Pretensioner circuit poor electrical connection
Faulty Air Bag Control Module
How to Fix the B0131 Lexus Code?
Start by checking the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.
What is the Cost to Diagnose the Code B0131 Lexus?
The cost to diagnose the B0131 Lexus code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.
The right seat belt pretensioner squib circuit consists of the air bag center sensor and right seat belt pretensioner. The squib circuit causes the right seat belt pretensioner to deploy when deployment conditions are satisfied. The Air Bag Control Module monitors the Right Seat Belt Pretensioner. The Air Bag Control Module sets the OBDII code when the Right Seat Belt Pretensioner is not to factory specifications.
B0131 Lexus Code - Open Right Seat Belt Pretensioner Squib Circuit
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.