Porsche P0543 Intake Air Heater Incorrect Voltage

Description

OBD-II Trouble Code Description for P0543 Porsche

Intake Air Heater “A” Circuit Open

What does this mean?

OBD2 Code P0543 Porsche definition:
The engine control module (ECM) uses an intake air heater (IAH) to warm the incoming air for proper cylinder combustion. The ECM grounds the control coil of the IAH relay to energize the heater during cold operation. The ECM sends a bias voltage on diagnostic circuits one and two. If this voltage is not pulled low when the relay is OFF, or is high with the relay ON, DTC P0543 Porsche will set. The ECM will only store info on first failure, It triggers the SES light on the second failure.

Symptoms

Possible sumptoms of OBD code P0543 Porsche
– Engine Light ON (or Service Engine Soon Warning Light)

Causes

Possible causes of OBD code P0543 Porsche
– Inatake air heater circuit open or shorter – Faulty intake air heater relay – Faulty intake air hearter

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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