Volvo All Engines (2017 Emissions) Fault Code: P054070 PID: EMS Intake Air Heater “A” Control
Volvo All Engines (2017 Emissions) Fault Code: P054070 PID: EMS Intake Air Heater “A” Control
Circuit description
The preheat function is used to warm up the inlet air during cold conditions both before and after cranking to make the starting easier and better for the environment at very low temperatures. This diagnostic trouble code (DTC) detects a faulty preheat function.
Conditions for diagnostic trouble code (DTC)
Intake air heater (IAH) relay not activated
The voltage at pin A14.EB:7 is more than 91 % battery voltage
Observable symptoms
Intake air heater (IAH) relay may be constantly activated
High intake air temperature (IAT)
High current consumption
Low battery voltage
Probable cause
1) Wiring harness
2) Connector
3) Intake air heater (IAH) relay
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