OBD-II Generic Error Code P0564: How to Fix It

Q: Is it safe to drive with error code P0564?

Yes, generally safe, but cruise control may not work. The code does not affect engine performance or braking.

Q: Can a bad brake light switch cause P0564?

Yes, a faulty brake light switch or incorrect adjustment can trigger P0564 because the cruise control uses brake input.

Q: How much does it cost to fix P0564?

DIY fix costs mostly parts: switch $20-100, module $50-300. Professional repair ranges $100-400 depending on labor.

Q: Will disconnecting the battery clear P0564?

Temporarily yes, but the code will return if the underlying issue is not fixed.

Q: What does 'multifunction input A' mean?

It refers to the set of switches (On, Off, Set, Resume, Cancel) that control cruise. The 'A' circuit is the primary input signal.

Abstract

Error code P0564 indicates a problem with the cruise control multifunction input 'A' circuit. This means your car's computer has detected a malfunction in the signal from the cruise control switches or wiring. It may prevent the cruise control from engaging or cause it to disengage unexpectedly.