P0859: Traction Control Input Signal High
MediumPowertrainTransmission
What does P0859 mean?
P0859 is a diagnostic trouble code indicating "Traction Control Input Signal High". This code relates to your vehicle's transmission and should be diagnosed to determine the root cause. The severity level helps indicate how urgently this should be addressed.
Common causes
- Faulty transmission component
- Wiring or connector issue in the related circuit
- Failed sensor providing incorrect readings
- Software/calibration issue requiring ECU update
- Related component causing secondary fault
What should you do?
Schedule a diagnostic appointment at your earliest convenience. The vehicle is generally safe to drive short distances, but the underlying issue should be addressed to prevent it from worsening.
Get a diagnosis for YOUR car
Code P0859 can mean different things depending on your vehicle. TorqueBot gives you a diagnosis specific to your make, model, and year.