Code : Spn 729 Fmi 03

Inlet Air Heater Relay Output (cc# 189) Is High When Engine Control Unit Is Not Energizing The Glow Plug Relay (9540)

Spn 729 Fmi 03 problem code is about Inlet Air Heater Relay Output (cc# 189) Is High When Engine Control Unit Is Not Energizing The Glow Plug Relay (9540). If you don't take the time to look into Spn 729 Fmi 03 engine problem when it arises, it can add up quickly. One small issue like Spn 729 Fmi 03 can cause a larger component to become damaged without taking the time to investigate. If you suspect your truck is suffering from one of these issues, look into replacing those small components to save money down the road.

Note: This description represents text descriptions for faults supported by another coding system and does not necessarily comply with SAE J1939. For a specific engine manufacturer's explanation for codes, please consult the engine's technical manual.

SPNFMI Faults and Engine error code check tool. SPN code listing with names and descriptions.

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