Description
OBD-II Trouble Code Description for P0543 Isuzu
Intake Air Heater “A” Circuit Open
What does this mean?
OBD2 Code P0543 Isuzu 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 Isuzu 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 Isuzu
– Engine Light ON (or Service Engine Soon Warning Light)
Causes
Possible causes of OBD code P0543 Isuzu
– 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 Isuzu:
2011 Isuzu Rodeo 3.0 Denver,2008 Isuzu Pickup,2007 Isuzu Ascender,2002 Isuzu Axiom XST Concept,2002 Isuzu Axiom XSR Concept,2001 Isuzu Zen Concept,2001 Isuzu GBX Concept,2001 Isuzu Axiom XSF Concept
Note:
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