Powertrain
generic / SAE
P0859
Traction Control Input Signal High
The traction control input signal to the ECM reports a input signal high condition. Engine torque reduction during wheel slip cannot be commanded reliably.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number8 / 59
Possible causes
- Signal wire shorted to B+ high
- TCS module output high medium
Symptoms
- Check engine or transmission warning light on
- Harsh, delayed, or missing shifts
- Possible limp mode (locked in one gear)
- Slipping or shuddering during gear changes
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 150–800 €
- Estimated time: 0.5–3 h
- Component: traction control module
- Component: wiring harness
- Component: ecm
- MIL / check engine light
- limp mode possible
Sources
References
sae:J2012