P0572 Code - Cruise Control/Brake Switch 'A' Circuit Low

What Does P0572 Mean?

When the brake pedal is depressed, the stop light switch sends a signal to the Engine Control Module (ECM). When the ECM receives this signal, it cancels the cruise control.

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What are the common causes of P0572 ?

• Rough running engine due to misfiring plugs. Many engines have misfire codes to indicate the cylinder effected, such as P0307 for number 7.
• Rarely - faulty Powertrain Control Module (PCM-programming required after replacement)
• A large air leak at or near the number one oxygen sensor would also cause a lean mixture.

How do you troubleshoot P0572 ?

The most common repair for the P0572 code is replacing a failed brake light switch. However, other repairs that may be necessary include:

• Replacing a failed cruise control switch
• Adjusting a poorly adjusted brake light switch
• Replacing blown fuses
• Replacing faulty cruise control modules (rare)

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