Volvo All Engines (2010 Emissions) Fault Code: SPN 730 FMI 4 PID: SID 71 Intake Air Heater (IAH) 2
Conditions for diagnostic trouble code (DTC):
1) Preheating requested
2) The voltage at pin A14.EB:14 is less than 29?% of the battery voltage
Observable symptoms
1) Intake air heater (IAH) does not function
2) White smoke at cold start
3) Difficult to start in extreme cold
Probable cause
1) Wiring harness
2) Connector
3) Intake air heater (IAH) relay
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