P0578 Code - Cruise Control Multi-Function Input 'A' Circuit Stuck

What Does P0578 Mean?

OBD-II Code Cruise control will not operate is defined as a Cruise Control Multi-Function Input "A" Circuit Stuck

The Cruise Control System is controlled by the Body Control Module. The Body Control Module monitors driver inputs to the cruise control system and sends that request to the engine computer (PCM). If the body control module detects an invalid input from the cruise control switches, code P0578 will be set.

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What are the common causes of P0578 ?

• Some aftermarket accessories and performance modifications
• A faulty oxygen sensor. This will set a code in itself, however, a faulty oxygen sensor does not automatically condemn the sensor. The code just means that the sensor signal was not within specifications. An air leak or any of the above will cause an erroneous signal. There is a multitude of O2 codes relating to O2 performance which gives a clue to the problematic area.
• An air leak forward of the DPF will change the sensor readings resulting in the code

How do you troubleshoot P0578 ?

In order to repair the P0578 code, a mechanic may replace the cruise control switch, repair or replace any damaged electrical components, and/or replace any burnt fuses.

Searches related to P0578 Code - Cruise Control Multi-Function Input 'A' Circuit Stuck

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