P0857 OBD-II Trouble Code: Traction Control Input Signal Range/Performance

Our certified mechanics come to you · Get a fair and transparent estimate upfront

Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0857 code

P0857 is a diagnostic trouble code (DTC) for "Traction Control Input Signal Range/Performance". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$20.00
Toyota$20.00
BMW$20.00
SCHEDULE P0857 DIAGNOSTIC Get a fair and transparent estimate upfront

P0857 code definition

The P0857 refers to a malfunction found in the vehicle's traction control input signal circuit. This error is most often registered by the Powertrain Control Module (PCM), but it may also be detected by one of the other control modules relating to the traction circuit.

What the P0857 code means

The traction control input signal circuit relays information to system-related control modules, promoting cooperation between the vehicle's traction and engine performance. This trouble code occurs when one of the control modules has failed to receive a message from the traction control input signal circuit.

What causes the P0857 code?

The P0857 will be logged when the PCM or one of the other control modules fails to pick up an input signal from the traction control module. In many cases, this is a result of liquid contact damage with the module or one of the related components. In the vast majority of cases, the P0857 is the result of a faulty traction control switch. The traction control module may be defective. Defective, broken, corroded or disconnected wiring may also cause a P0857 code.

What are the symptoms of the P0857 code?

A failure of the traction system and problems with transmission are the typical symptoms associated with a P0857. Fuel efficiency is generally weakened as well. At its worst, the P0857 will disable the vehicle's ability to shift gears. For the purpose of diagnosing the code, the P0857 code will be stored in the vehicle's onboard computer and the dashboard engine light illuminated.

How does a mechanic diagnose the P0857 code?

The P0857 code can initially be identified by inputting an OBD-II code reader into the vehicle's computer. The traction control switches should be inspected first, as these are by and large the most common sources of a P0857 trouble code. If the problem is suspected to lie in one of the traction-related control modules, a specialized scanner like the Autohex may spare you the time of inspecting them all individually. All wiring related to the traction control circuit should be inspected for signs of corrosion and disconnection. Any other components related to the traction circuit should be looked over as well.

Common mistakes when diagnosing the P0857 code

The traction control module is sometimes blamed as the cause mistakenly. However, the problem more often lies with malfunctioning switches, circuits and/or wiring.

How serious is the P0857 code?

The severity of a P0857 code should be determined by its symptoms. Mild cases will affect drivability, while more advanced instances will result in the vehicle's inability to shift gears, rendering it inoperable. Because reduced drivability can pose a safety concern on the road, the P0857 code should be dealt with as soon as possible.

What repairs can fix the P0857 code?

Additional comments for consideration regarding the P0857 code

The P0857 trouble code only pertains to vehicles with electronic traction control systems.

Need help with a P0857 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

trouble codes
P0857
Check Engine Light

No more waiting rooms! Our mechanics will come to you to diagnose and fix the P0857 code.

SCHEDULE P0857 DIAGNOSTIC
Get a $20 credit for the follow-up repair

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.8/5

Number of Reviews

5,064

Rating Summary
4,665
194
48
27
130
4,665
194
48
27
130

Mario

8 years of experience
22 reviews
Mario
8 years of experience
Chrysler PT Cruiser - Check Engine Light is on - Los Angeles, California
He was very courteous and knowledgeable. You can tell he knows his trade. Satisfied with his service.

Yoel

8 years of experience
91 reviews
Yoel
8 years of experience
Nissan Versa Note - Check Engine Light is on - Upper Darby, Pennsylvania
Yoel is very competent and provides great customer service. He took the time to explain and show me exactly what was going with my car. I will definitely use him again and recommend him to others.

Jason

31 years of experience
148 reviews
Jason
31 years of experience
Ford Explorer - Check Engine Light is on - Phoenix, Arizona
Jason was on time, friendly, explained everything he was doing and let me know the other services available, so when Jason comes back to install the new part I am having the oil changed too.

DeVaughn

25 years of experience
1 reviews
DeVaughn
25 years of experience
BMW X3 - Check Engine Light is on - Moreno Valley, California
The mechanic arrived on time, completed the work, which was replacement of an oxygen sensor, in a timely and professional manner.


More related articles

P0385 OBD-II Trouble Code: Crankshaft Position Sensor B Circuit Malfunction
P0385 means the crankshaft position sensor B circuit is malfunctioning
P2405 OBD-II Trouble Code: EVAP Leak Detection Pump Control Circuit Low
P2405 P2405 code definition Evaporative Emission Control System (EVAP) Leak Detection Pump Control Circuit Low What the P2405 code means P2405 is an OBD-II generic code for the Engine Control Module (ECM) detecting that the evaporative system leak detection pump...
P3473 OBD-II Trouble Code: Cylinder 10 Deactivation/Intake Valve Control Circuit/Open
P3473 means a cylinder was deactivated during certain driving conditions due to low oil pressure, faulty cylinder, or restricted oil passage.

Related questions

Transmission making clunking and banging noises - 2005 Chevrolet Avalanche 2500 V8 Automatic

Check for problem codes - you mention that the Check Engine Light is on. This could be the torque convertor clutch not releasing as you slow down, or not locking up smoothly when you reach 40-50 mph accelerating. And yes,...

P1292 and P0181 come on when I hit a bump

If these two codes keep coming up together, it sounds like there is probably a spot in the wiring harness that is shorting to ground. P1292 is for an injector and the P0181 is for a fuel temperature sensor, so...

When the AC is turned on my Check engine light comes on , code reading throttle position sensor, not enough voltage.

If you have the electronic type throttle that has no cable to the throttle body, then you will need to check to make sure that battery voltage is not dropping below 12.5 volts when your A/C is turned on. You...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com