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Detroit DD15 EPA10 (2010-13) Fault Code: SPN 4752 FMI 0 (MCM) Exhaust Gas Recirculation Cooler Low Efficiency

DESCRIPTION:
Exhaust Gas Recirculation (EGR) cooler low efficiency.

MONITORED PARAMETER:
Intake manifold and charge air cooler outlet temperature sensors.

TYPICAL ENABLING CONDITIONS:
1. Coolant temperature greater than 70°C (158°F)
2. Engine running greater than 5 minutes.

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Always enabled

TYPICAL DURATION:
10

DASH LAMPS:
1. MIL
2. CEL

ENGINE REACTION:
Derate 10%

VERIFICATION:
1. Start engine.
2. Warm up such that coolant temperature greater than 70°C (158°F).
3. Run engine greater than 5 minutes.

NOTE: If there are any cooling system related issues, fix those first.

PROBABLE CAUSES:
1. Intake manifold air temperature sensor.
2. Intake manifold air temperature sensor connector/harness.
3. EGR system leaks (Look for soot).
4. Remove the EGR hot pipe, EGR crossover tube, and mixer pipe. If blockage found, replace the EGR Cooler.

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