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P0590 Cruise control switch: stuck ("B")

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P0590 means: Cruise control switch: stuck ("B"). There is a fault in the cruise control or its switches. OK to drive, but have it checked soon. The most common repair costs about €50–100 in Estonia, depending on make and model. The most common cause: steering wheel switches or their wiring.

Is it safe to drive?OK to driveOK to drive, but have it checked soon.
Switch replacement€50–100parts and labour in Estonia, depending on make and model

What it means

There is a fault in the cruise control or its switches. It doesn't harm the engine, but cruise control may not work.

What you may notice

  • Cruise control won't engage or drops out
  • Engine light may be on

What could be wrong

  1. 1Steering wheel switches or their wiring · Switch replacement €50–100
  2. 2Brake or clutch pedal switch · Switch replacement €50–100
  3. 3Speed sensor signal · Speed sensor replacement €90–180
  4. 4Engine computer software · Control unit check and software €150–300

Repair difficulty: Easy

What you can check yourself

Check that the brake lights work properly. A faulty brake light switch often switches cruise control off. You can check the simple things yourself, but the repair is best done in a workshop.

How we fix it

  1. We check the switch states on the diagnostic tool
  2. We check the pedal switches and wiring
  3. We replace the faulty switch

Standard SAE description: Cruise Control Multi-Function Input "B" Circuit Stuck

Check the fuse · If a light, the horn, wipers, a socket or the fuel pump is dead, a blown fuse may be the cause.Fuse boxes by car →

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 P0590 mean?

Cruise control switch: stuck ("B"). There is a fault in the cruise control or its switches. It doesn't harm the engine, but cruise control may not work.

Can I drive with code P0590?

OK to drive, but have it checked soon.

How much does it cost to fix P0590?

It depends on the cause: switch replacement €50–100; speed sensor replacement €90–180. Prices include labour at €45/h, depending on make and model.

How is P0590 fixed?

We check the switch states on the diagnostic tool. We check the pedal switches and wiring. We replace the faulty switch.

Related codes

P0591Cruise control switch: reading or operation not right ("B")P0592Cruise control switch: signal or voltage too low ("B")P2530Ignition switch run position: circuit faultP2531Ignition switch run position: signal or voltage too lowP2532Ignition switch run position: signal or voltage too highB1318Battery voltage too low (body module)

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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