CAR OBD CODES

P0542 OBD Code Definition:
P0542 Intake Air Heater Relay 1 High
P0542 OBD Code Description:

OBD2 Code P0542 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 P0542
– Engine Light ON (or Service Engine Soon Warning Light) Possible Causes

Possible causes of P0542
– 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 code is detected when the Signal from the #1 intake air heater output does not match the signal input Possible Solutions

Note: The information on the P0542 error code is purely informative, if you need more useful information, please consult your technician.