Lincoln P0543 Intake Air Heater Incorrect Voltage

Description

OBD-II Trouble Code Description for P0543 Lincoln

Intake Air Heater “A” Circuit Open

What does this mean?

OBD2 Code P0543 Lincoln 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 Lincoln 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 Lincoln
– Engine Light ON (or Service Engine Soon Warning Light)

Causes

Possible causes of OBD code P0543 Lincoln
– 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 Lincoln:

2013 Lincoln MKZ,2013 Lincoln MKT,2013 Lincoln MKS,2013 Lincoln MKC,2012 Lincoln MKZ,2011 Lincoln MKX,2010 Lincoln MKZ,2010 Lincoln MKT,2009 Lincoln MKS,2009 Lincoln C Concept,2008 Lincoln MKT Concept,2007 Lincoln Navigator,2007 Lincoln MKZ,2007 Lincoln MKX,2007 Lincoln MKR Concept,2006 Lincoln Zephyr,2006 Lincoln Mark LT,2006 Lincoln MKS Concept,2004 Lincoln Mark X Concept,2004 Lincoln Aviator Concept,2003 Lincoln Town Car,2003 Lincoln Aviator,2001 Lincoln MK9

 

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