Code result
P0791
Intermediate Shaft Speed Sensor A Circuit
High severity
What it means
The TCM detects an electrical fault on the intermediate shaft speed sensor A circuit. Used to compute shift slip and torque converter behavior.
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
Speed sensor failed
highOne of the most commonly reported causes for this code — check this first.
Wiring open or shorted
mediumA plausible cause — test and verify before replacing parts.
Related help
Get the full diagnosis
Add your vehicle and see step-by-step repair help, recalls, and TSBs in Wrenchify.
Diagnose P0791 freeNo credit card required