P0542

2017-10-10

Description:

  • The fault code P0542 implies that the intake air heater circuit 'A' is indicating a high voltage, which can lead to the malfunctioning of the intake air heater system. This may cause the engine to run roughly or not start at all.

Possible Symptoms:

  • Illuminated check engine light

  • Rough idling or stalling

  • Engine fails to start

  • Decrease in engine power or acceleration

Possible Causes:

  • Failed intake air heater relay

  • Blown fuse in the air intake heater circuit

  • Damaged or broken intake air heater element

  • Faulty electrical connections in the circuit

Related Parts:

  • Air Heater: Air heater warms the incoming air if it is cold. Problems lead to poor fuel economy

Possible Solutions:

  • Replace the intake air heater relay

  • Check and replace any blown fuses in the air intake heater circuit

  • Replace the damaged or broken intake air heater element

  • Check and repair any faulty electrical connections in the circuit

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