OBD Code P0541

Intake Air Heater “A” Circuit Low

What’s mean?

OBD2 Code P0541 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 P0541
– Engine Light ON (or Service Engine Soon Warning Light)

Possible Causes

Possible causes of P0541
– 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 P0541 code is detected when the Signal from the #1 intake air heater output does not match the signal input

Possible Solutions