Detroit DD16 EPA07 (2007-09) Fault Code: SPN 1077 FMI 14 (MCM) Internal or External Leakage of the High Pressure Fuel System (Too High, Leak Down Test)

NOTE: The Motor Control Module (MCM) monitors rail pressure during engine shut down and compares it to a stored learned value. If the bleed-down rate has changed due to leakage and it is below the learned value, this code will set.

DESCRIPTION:
Leakage in high pressure fuel system to high (leak down test).

MONITORED PARAMETER:
Fuel rail pressure.

TYPICAL ENABLING CONDITIONS:
Key off

MONITOR SEQUENCE:
None

EXECUTION FREQUENCY:
Once when enabling conditions met.

TYPICAL DURATION:
30 seconds

DASH LAMPS:
1. MIL
2. CEL

VERIFICATION:
Rail pressure bleed off test using the diagnostic service tool.