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 for $114.99 . Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $20.0 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 $114.99 $20.0
Toyota $114.99 $20.0
BMW $124.99 $20.0
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.

Check Engine Light
trouble codes
P0857

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

(7400)

Rating Summary
6879
249
58
41
173
6879
249
58
41
173
 at YourMechanic

David

13 years of experience
393 reviews
David
13 years of experience
Chevrolet Malibu L4-2.4L - Check Engine Light is on Inspection - Marietta, Georgia
He explained everything to me in detail on what I needed to know about my car. Definitely recommend him for getting the job done.
 at YourMechanic

Raymond

37 years of experience
402 reviews
Raymond
37 years of experience
Toyota Camry L4-2.2L - Check Engine Light is on - Las Vegas, Nevada
Raymond did a great job however I was charged for two hours labor and he was only here less than 45 minutes. should I expect this on future appointments with your mechanic ?
 at YourMechanic

Shane

17 years of experience
217 reviews
Shane
17 years of experience
Volkswagen EuroVan V6-2.8L - Check Engine Light is on Inspection - Austin, Texas
Arrived on time. Explained the issues he found and how he will fix it. I have parts on order and will schedule an appointment to have Shane install the parts when they arrive.
 at YourMechanic

Kanstantsin

19 years of experience
51 reviews
Kanstantsin
19 years of experience
Ford F-150 V8-4.6L - Check Engine Light is on Inspection - Littleton, Colorado
Kanstantsin arrived early. Was very courteous and professional. Will highly recommend to anyone. Thank you Kanstantsin.


More related articles

P0675 OBD-II Trouble Code: Cylinder 5 Glow Plug Circuit
P0675 means that there is an issue in engine cylinder 5's glow plug circuit due to a problem directly related to the glow plug itself.
P0676 OBD-II Trouble Code: Cylinder 6 Glow Plug Circuit
P0676 means that the glow plug has failed to heat up properly and could be damaged due to a defective glow plug, module, timer, or relay.
B1270 OBD-II Trouble Code: Servo Motor Potentiometer Defrost Circuit Short to Battery
B1270 means there is a malfunction with the servo motor potentiometer defrost circuit, likely caused by a defective potentiometer or faulty motor.

Related questions

obd trouble code p0014 , hard up shifting
The code P0014 is for the cam sensor but since you already replaced it, then you will have to have the camshaft end play checked per a technical service bulletin (TSB) to see if it is in excess of specifications....
My engine light came on approximately 10 months ago. I had a diagnostic test ran on it. It stated that I needed a TCM.
Hi there, thanks for writing in. The traction control module (https://www.yourmechanic.com/article/how-long-does-a-traction-control-module-last) is a part of the ECM, but usually is a separate component from the main control module. The best way to solve the issue is to have a professional...
voltage warning light still coming on 30-45 seconds after car starts.
Nothing should be replaced until you have in hand a definitive diagnostic pinpointing the faulty segment of the car's electrical system. There may be too much voltage drop in the charging circuit, as well as elsewhere, but start with the...

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 (855) 347-2779 · hi@yourmechanic.com