P0544Medium SeverityEngine

Intake Air Heater A Circuit Intermittent

What This Means

The intake air heater circuit A signal is cutting in and out. This heater warms intake air on diesel engines to aid combustion during cold starts.

Common Symptoms

Hard cold starting (diesel)
White smoke on startup
Rough cold idle
Intake heater light issue

Common Causes

Burned out heater element
Relay failure
Wiring damage
Fuse blown
Controller failure

Estimated Repair Cost

$100 – $500

Parts and labor (varies by vehicle and location)

Difficulty:Moderate

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For informational purposes only. Diagnostic trouble codes are starting points for diagnosis, not definitive answers. Always consult a certified mechanic for proper diagnosis and repair. Estimated costs vary by vehicle, location, and shop rates.