What does code P0859 mean?

Q: What does code P0859 mean?

Traction Control Input Signal High. This code means the traction control module has detected an abnormally high voltage on an input signal circuit that it relies on to manage wheel slip. The computer is seeing a signal that stays above the expected range, which it interprets as a fault in that circuit or the component feeding it.

DTC codes / P08xx · Transmission / P0859

P0859Traction Control Input Signal High

This code means the traction control module has detected an abnormally high voltage on an input signal circuit that it relies on to manage wheel slip. The computer is seeing a signal that stays above the expected range, which it interprets as a fault in that circuit or the component feeding it.

SystemPowertrain

Code typeGeneric (all makes)

SeverityMedium

Fix difficultyIntermediate

AreaTransmission

Guidance is general and written for all OBD-II vehicles. Exact tests and values vary by model, so confirm the fault before replacing parts.