Code result
P2550
Torque Management Request Input Signal B Low
Moderate severity
What it means
Torque management input B reads stuck low — short to ground or message at minimum. ECM rejects the request, only A-side is used.
Is it safe to drive?
Use caution
The vehicle is usually drivable for short distances, but the problem can worsen or affect emissions. Diagnose and repair as soon as practical.
Most likely causes
Signal wire shorted to ground
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 P2550 freeNo credit card required