How to Diagnose and Fix P0540 Engine Code - OBD II Trouble Code Explain
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YouTubeCar A-Z
How to Diagnose and Fix P0540 Engine Code - OBD II Trouble Code Explain
OBD-II Code P0540 is defined as a Intake Air Heater 'A' Circuit. The Intake Air Heater warms the air going into the engine on cold startups. If the engine control module (PCM) detects a failure in the Intake Air Heater or its wiring, it will set code P0540. f439
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