Detroit DD15 GHG14 (2014-16) Fault Code: SPN 615 FMI 4 (MCM) Axial Power Turbine Air Seal Pressure Regulator Valve Circuit Failed High
NOTE: Repair short to power between turbocharger compound air seal pressure regulator valve harness connector pin 1 and pin 70 of the motor control module (MCM) 120-pin connector.
PROBABLE CAUSES:
1. APT air seal pressure regulator valve harness connector/wiring.
2. APT air seal pressure regulator valve.
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