OBD-II Trouble Code Description for P0542 Dodge

Intake Air Heater “A” Circuit High

What does this mean?

OBD2 Code P0542 Dodge 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.

Symptoms

Possible sumptoms of OBD code P0542 Dodge
– Engine Light ON (or Service Engine Soon Warning Light)

Causes

Possible causes of OBD code P0542 Dodge
– Open or short intake air heater relay circuit condition – Intake air heater relay poor electrical connection – Faulty Intake Air Heater Relay The Error code is generally activated on detection of the following conditions: The P0542 Dodge code is detected when the Signal from the #1 intake air heater output does not match the signal input

Possible Solutions