Code result
P0857
Traction Control Input Signal Range/Performance
High severity
What it means
The traction control input signal to the ECM reports a input signal range/performance condition. Engine torque reduction during wheel slip cannot be commanded reliably.
Is it safe to drive?
No — stop driving
This code can put the vehicle into limp or reduced-power mode. Avoid extended driving and have the vehicle diagnosed promptly.
Most likely causes
TCS signal implausible vs. wheel speeds
highOne of the most commonly reported causes for this code — check this first.
Module calibration off
mediumA plausible cause — test and verify before replacing parts.
Sensor element aged beyond calibration window
lowLess common, but worth ruling out after the more likely causes.
Related help
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