Code result
P0703
Torque Converter/Brake Switch B Circuit Malfunction
High severity
What it means
A general circuit fault on the secondary brake switch B - typically used as redundant input for safety-critical functions like cruise control cancellation and shift-interlock.
Is it safe to drive?
No — stop driving
This code points to a problem that can cause damage or affect safety. Avoid driving and have the vehicle diagnosed promptly.
Most likely causes
Open in switch or wiring
highOne of the most commonly reported causes for this code — check this first.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P0703 freeNo credit card required