Engine operation malfunction, DTC P1187 - AF07.16-P-6001A

ENGINE 668 in MODEL 168 

ENGINE 611 in MODEL 202, 203, 210 

ENGINE 612 in MODEL 163, 203, 210 

ENGINE 613 in MODEL 210, 220 

Damage code	Cause	Remedy
	Cause 1:	Remedy 1:
	Pressure control valve / Rail	Perform the following tests: ↓
	Possible complaints:	1 Check injector smooth running correction values with HHT/DAS.
	DTC P1187 (negative standard deviation) stored in common rail control module. Engine starts with long delay or starts only after a cooling period of longer than 30 min. Engine idle surges when cold and warmed up (induced by load change)	2 Check rail pressure deviations with HHT/DAS. Maximum permissible pressure deviation 8 bar.
		3 Check fuel pressures in feed and return.
		If no faults are recognized: ↓ 4 Remove pressure control valve, replace. Remove rail and convert pressure control valve because rail installation position is too narrow.	AR07.16-P-1060HB
		5 Visually check rail hole for possible scoring or chatter marks from machining.
		If an O-ring is damaged: ↓ 6 Remove complete rail, replace. When converting thoroughly observe cleanliness and tighten mounting screws to prescribed tightening torque.
		Improper installation of one of the two O-rings during conversion also leads to one of the complaints specified above.
	Cause 2:	Remedy 2:
	Two-mass flywheel	1 Remove two-mass flywheel, replace
	Engine idle surges when cold and warmed up (induced by load change) In the event of complaint "Engine shakes when idling" and on vehicles with manual transmission.