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Detroit DD15 GHG14 (2014-16) Fault Code: SPN 103 FMI 4 (MCM) Turbo Speed Sensor Failed Low

DESCRIPTION:
This fault sets when the motor control module (MCM) detects a short to ground on the turbocharger speed sensor circuit.

MONITORED PARAMETER:
Turbocharger speed sensor.

TYPICAL ENABLING CONDITIONS:
Always on

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Continuous when enabling conditions met.

TYPICAL DURATION:
Two seconds

DASH LAMPS:
CEL

ENGINE REACTION:
None

VERIFICATION:
Cycle key

PROBABLE CAUSES:
1. Turbocharger speed sensor wiring/connector.
2. Turbocharger speed sensor.

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