Easy Car Diagnostic (Breakdowns, Battery, Component wear & Pollution)

Buy the diagnostic tool

 

Download the mobile app

P0542 – All makes

Code : P0542
Make : All makes
Description : P0542 Intake Air Heater ‘A’ Circuit High
Possible causes :
– Faulty Intake Air Heater (IAH) Relay
– Faulty Intake Air Heater
– Intake Air Heater Relay harness is open or shorted
– Intake Air Heater Relay circuit poor electrical connection
– Intake Air Heater harness is open or shorted
– Intake Air Heater circuit poor el
Solutions :
– Carry out a Reset via CarDiag
– Choose a better quality fuel
– Check that the tank cap is securely closed
– Check the oil level and add more if it is lower than MAX
– Restart an Automatic diagnostic via CarDiag
– If the fault persists, you can check the “Possible causes” listed above : visually inspect (by yourself (tutorials to come) or by a professional) the wiring harness and the associated connectors, check for damaged components, and look for broken, bent, pushed, or corroded connector pins.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top