Powertrain
generic / SAE
P0540
Intake Air Heater A Circuit
The intake air heater control circuit reports a generic fault. Heater is used on diesel and some gasoline engines for cold-start emissions and starting reliability.
SystemPowertrain
Typegeneric / SAE
GroupP0
Range / number5 / 40
Possible causes
- Heater element open or shorted high
- Heater relay defective medium
- Wiring fault low
Inspection / repair
- Difficulty: medium
- DIY: shop recommended
- Estimated cost: 120–500 €
- Estimated time: 0.5–2 h
- Component: intake air heater
- Component: heater relay
- Component: heater wiring
- MIL / check engine light
- emissions-relevant
Sources
References
sae:J2012