Skip to main content ↑ ↓
Topic: Yellow stop engine light (Read 622 times) previous topic - next topic

Yellow stop engine light

Cranked up my 97 U320 today and the yellow stop engine light is on. Drained the fuel filter- no water. I suspect either oil pressure sending unit or coolant level sensor? All the dash gauges show normal operation. Where are the oil pressure sending units? I've read in here there are two. One for dash and one for ECU.
Jody and Juli
1997 U320 40ft. Cummins M11 400hp
Build #5028
Master Mariner Unlimited Tonnage
USNR Lt. Commander (ret)
Texas A&M Maritime (me)
Baylor (wife)

Re: Yellow stop engine light

Reply #1 –
The one that failed on my M11 was sort of below and behind the Air conditioner compressor.  There are schematics that show that location.  Mine needed a 1-1/4" crow foot wrench.  There is not enough room to use a socket to reach the sensor.

Edit:  link to schematic  https://f01.justanswer.com/cumminsdr/37ed0568-6860-4079-ad94-a4b78c0250e1_Capture.PNG
1998 U320 40'
2005 GMC Yukon
MC# 17609

Re: Yellow stop engine light

Reply #2 –
What does the sensor that triggers the stop engine light on the M11 actually sense?
David and Carolyn Osborn
1995 U320C SE 40' Build 4726 Feb 1995
FMCA 147762
Motorcade 17186

Re: Yellow stop engine light

Reply #3 –
Quote from: D.J. Osborn –
What does the sensor that triggers the stop engine light on the M11 actually sense?

That one is the oil pressure signal to the ECM.  there is another oil sensor that sends a signal to the gauge on the dash
1998 U320 40'
2005 GMC Yukon
MC# 17609

Re: Yellow stop engine light

Reply #4 –
Usually the engine stop parameters are:
Low oil pressure
Low coolant level
High coolant temperature

On my coach the stop engine light is red.
The check engine light is yellow and will come on when the ECM detects a variance to one of the multitude of engine parameters. These can be hard faults or just transient anomalies.



Steve & Sandy
2003 U320 4220 WCDS, build#6160
Motorcade #17794
USMC '67-'71

Re: Yellow stop engine light

Reply #5 –
Codes?
Learn every day, but especially from the experiences of others. It's cheaper!  - John C. Bogle

2000 U320 36' non-slide / WildEBeest Rescue
2003 U320

Re: Yellow stop engine light

Reply #6 –
Stop Engine light on my 2001 is red as well. Check Engine light is yellow.  Lots of reasons for the yellow light.  If you can connect to the diagnostic port (any diesel shop should be able to do this or if you have VMSpc) you can read the codes sent by the engine computer.
Roger Engdahl and Susan Green
2001 U320 3610 #5879 (Home2) - 2014 Jeep Cherokee or 2018 F150
Hastings, MN

Re: Yellow stop engine light

Reply #7 –
I noticed the positive post on my starting battery was loose. Took it off and put back on and the stop engine light went away....go figure
Jody and Juli
1997 U320 40ft. Cummins M11 400hp
Build #5028
Master Mariner Unlimited Tonnage
USNR Lt. Commander (ret)
Texas A&M Maritime (me)
Baylor (wife)
 

Re: Yellow stop engine light

Reply #8 –
Yup, intermittent voltage/voltage spikes can really mess up a computer controlled engine.
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020