P0856

Traction Control Input Signal

Severity

⚠️ Medium

Can you drive?

Do not drive — repair immediately

Approx. repair cost

$17–89 (est.)

Symptoms

Check engine light is on
Traction control system disabled
Reduced acceleration dynamics
Unstable operation on slippery surfaces
Possible problems with ABS

Causes

Wheel speed sensor malfunction
Problems with wiring to the traction control module
Traction control module malfunction
Problems with system connectors
Engine control unit malfunction

How to Fix

Check ABS/TCS fault codes
Inspect the wiring and connectors of the traction control system
Check wheel speed sensors
Test the traction control module
If necessary, replace faulty components

Related codes

P0857 P0858 C0035