P0542

Intake Air Heater A Circuit High

Severity

⚠️ Medium

Can you drive?

Limited driving only, diagnose soon

Approx. repair cost

$56–167 (est.)

Symptoms

Difficulty starting the engine at low temperatures
Reduced engine power
Increased fuel consumption
Check Engine Light Is On

Causes

Short circuit in the heater circuit
Intake air heater malfunction
Problems with the heater relay
Broken or damaged wiring harness
Corrosion of connectors

How to Fix

Check the integrity of the heater circuit
Diagnose heater resistance
Check relays and fuses
Inspect the wiring harness and connectors
If necessary, replace the heater

Related codes

P0540 P0541 P0543