The P0857 trouble code indicates a range or performance issue with the traction control input signal. Here’s what you should know:
P0857 Traction Control Input Signal Range/Performance
Code symptoms P0857.
1. Illumination of the traction control warning light on the dashboard.
2. Traction control system may be disabled.
3. Potential reduction in vehicle stability during acceleration or cornering.
4. Possible rough or erratic engine operation.
Causes of the code P0857.
1. Faulty traction control switch.
2. Damaged or corroded wiring or connectors in the traction control circuit.
3. Issues with the traction control module (TCM).
4. Sensor malfunction or improper input signal.
Code Solutions P0857.
1. Replace the traction control switch if it’s found to be faulty.
2. Repair or replace any damaged wiring or connectors in the traction control circuit.
3. Ensure proper installation of the traction control switch and secure any wiring harnesses.
4. Reset the fault codes and test drive the vehicle to verify that the issue has been resolved.