Detroit DD15 EPA07 (2007-09) Fault Code: SPN 729 FMI 4 (MCM) Grid Heater Circuit Failed Low
PROBABLE CAUSES:
1. Drain the fuel filter module by removing the fuel filters or opening the drain valve. Hand tighten the drain plug and prime the fuel filter with the hand pump. If code doesn’t come back, problem solved.
2. Reset the water in fuel indicator.
3. Failed water in fuel sensor.
4. Water in fuel sensor connector/harness.
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![JOHN DEERE PARTS ADVISOR & HITACHI 2.24.2 [2023.07] - ECUFORCETRUCK EPC](https://www.ecuforcetruck.com/wp-content/uploads/2023/09/1-300x300.png)
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Volvo Premium Tech Tool PTT 2.8.130 Diagnostic Software 04.2022 ACPI ( 1 PC )
Trucks software $143.00 -
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