Ford P0571 Brake Light Switch Plausibility

Description

OBD-II Trouble Code Description for P0571 Ford

Brake Switch “A” Circuit

What does this mean?

OBD2 Code P0571 Ford definition:
When the brake pedal is depressed, the stop light switch sends a signal to the ECM. When the ECM receives this signal, it cancels the cruise control. A fail safe function is provided so that the functions normally, even if there is a malfunction in the stop light signal circuit. The cancel condition occurs as battery positive voltage is supplied to terminal STP. When the brake is on, battery positive voltage is normally applied through the STOP fuse and the stop light switch to terminal STP of the ECM, and the ECM turns the cruise control OFF. If the harness connected to terminal STP has an open circuit, terminal STP will have battery positive voltage and the cruise control will be turned OFF.

Symptoms

Possible sumptoms of OBD code P0571 Ford
– Engine Light ON (or Service Engine Soon Warning Light) – Stop light inoperative – Cruise control system inoperative

Causes

Possible causes of OBD code P0571 Ford
– Misadjusted brake switch – Brake switch open or short circuit – Poor brake switch electrical connection – Failed brake switch The Error code is generally activated on detection of the following conditions: The P0571 Ford codes is set when the stop light switch does not turn off even once the vehicle is driven.

Possible Solutions


The OBD2 Code Information Be Applicable For Ford:

2013 Ford Taurus,2013 Ford Mustang,2013 Ford Kuga,2013 Ford Fusion,2012 Ford Focus,2011 Ford Mondeo,2011 Ford Focus,2011 Ford Edge,2010 Ford Mustang,2009 Ford Focus,2008 Ford Fiesta,2008 Ford Escape,2007 Ford Mondeo,2006 Ford Focus,2005 Ford Mustang,2005 Ford Escape,2003 Ford Mustang,2003 Ford Focus,2000 Ford Mustang

 

Note:

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