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Sensors

P0857 Traction control signal: reading or operation not right

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P0857 means: Traction control signal: reading or operation not right. The computer found a fault in a sensor, valve or control circuit of this system. Drive gently and have the car checked soon. The most common repair costs about €90–180 in Estonia, depending on make and model.

Is it safe to drive?Get it checked soonDrive gently and have the car checked soon.
Valve replacement€90–180parts and labour in Estonia, depending on make and model

What it means

The computer found a fault in a sensor, valve or control circuit of this system. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.

What you may notice

  • Engine light on
  • A function doesn't work properly

What could be wrong

  1. 1Faulty sensor or valve · Valve replacement €90–180
  2. 2Damaged wire or connector · Wiring or connector repair €45–90
  3. 3Supply or fuse · Fuse replacement and cause check €30–60
  4. 4Engine computer fault (rare) · Control unit check and software €150–300

Repair difficulty: Moderate

What you can check yourself

Check the connector concerned and see whether the fault returns after clearing it. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

  1. We measure the component and its wiring
  2. We repair the wire or connector
  3. We replace the faulty part

Standard SAE description: Traction Control Input Signal Range/Performance

This code usually comes with: Check engine lightSee what the light means →

Want a definite answer?

Bring the car to our workshop in Estonia for diagnostics. We read the fault codes, test the sensors and tell you what is wrong. Repair price depends on the work involved, generally €45 per hour.

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Questions

What does fault code P0857 mean?

Traction control signal: reading or operation not right. The computer found a fault in a sensor, valve or control circuit of this system. There is a signal, but the reading or operation isn't plausible. The cause may be the part itself or a real mechanical fault.

Can I drive with code P0857?

Drive gently and have the car checked soon.

How much does it cost to fix P0857?

It depends on the cause: valve replacement €90–180; wiring or connector repair €45–90; fuse replacement and cause check €30–60. Prices include labour at €45/h, depending on make and model.

How is P0857 fixed?

We measure the component and its wiring. We repair the wire or connector. We replace the faulty part.

Related codes

P0858Traction control signal: signal or voltage too lowP0856Traction control signal: faultP0106Intake pressure (MAP) sensor reads wrongP0107Intake pressure (MAP) sensor signal too lowP0108Intake pressure (MAP) sensor signal too highP0070Outside air temperature sensor: circuit faultP0859Traction control signal: signal or voltage too high

Based on AI combined with our hands-on workshop experience and knowledge. This information is general and prices are approximate (Estonian workshop rates). The same code can mean different things on different cars. Only an inspection of the car gives a definite answer.

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