P0543 OBD II Trouble Code Intake Air Heater A Circuit Open

How to diagnose, repair, and info on symptoms and causes of a P0543 engine code which is an open circuit condition on diesel vehicles with an air intake heater. Also includes links to relevant forum discussions on the code.

Symptoms of P0543 OBD II Trouble Code

Common Causes of P0543 OBD II Trouble Code

Severity of P0543 OBD II Trouble Code

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