P0542
Intake Air Heater Relay 1 High
Generic code
Vehicle Speed and Idle Control System
High severity
Hard repair
Free on OBD DashX
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What P0542 means
- 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
Free on OBD DashX
P0542 on OBD DashX
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