Porsche P0571 Brake Light Switch Plausibility

Description

OBD-II Trouble Code Description for P0571 Porsche

Brake Switch “A” Circuit

What does this mean?

OBD2 Code P0571 Porsche 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 Porsche
– Engine Light ON (or Service Engine Soon Warning Light) – Stop light inoperative – Cruise control system inoperative

Causes

Possible causes of OBD code P0571 Porsche
– 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 Porsche 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 Porsche:

2013 Porsche Cayenne,2013 Porsche Boxster S,2013 Porsche Boxster,2013 Porsche 911,2012 Porsche Panamera,2012 Porsche 911,2011 Porsche 911,2010 Porsche Panamera,2010 Porsche Cayenne,2010 Porsche 911 GT3,2009 Porsche 911,2008 Porsche Cayenne,2008 Porsche Boxster,2008 Porsche 911,2007 Porsche Cayman,2007 Porsche Cayman,2007 Porsche Boxster,2007 Porsche Boxster,2007 Porsche 911,2006 Porsche 911,2005 Porsche Boxster S,2005 Porsche Boxster,2005 Porsche 911,2004 Porsche 911,2003 Porsche 911

 

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