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Old 04-23-2012, 11:38 AM   #1
Monaco Owners Club
Join Date: Jan 2010
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Check engine Stop engine light

Pulled into RV site a couple of days ago as I was about to shut down the engine the check engine and stop engine light began flashing. One would flash a couple of times go out then the other would began to flash. Checked the aladdin system, all engine and pressure systems were normal. I then checked the engine trans and coolant levels. All were good. The coach is a 07 Diplomat with a 400 cummins. Just wondering if anyone has an idea of whats wrong.


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Old 04-23-2012, 11:40 AM   #2
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Same happened to me kind of. It was my oil pressure sensor. Replaced it and all is good.

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Old 04-23-2012, 04:55 PM   #3
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Redcrown, the STOP engine light can be triggered by Low Coolant Level, Coolant Over Temp, and Low or No Oil Pressure. Don't assume anything until you have checked oil levels and coolant levels. STOP eng is serious and you can damage the motor, although it can be a bad sensor I highly recommend you first consider it a valid fault. The question is if you had any other warning lights other than a Check Engine and STOP Engine at the same time? With a STOP Engine the motor will derate its power which makes it almost impossible to drive. I had one after I changed my coolant and it burped a bubble and the coolant level dropped. Check your fan belt, check your oil level and coolant level. If all are good then the decision is up to you if you want to start it or not and watch the gauges especially the oil pressure gauge. I know a lot about motors and that would make me very nervous to start it without first checking the codes. If you are not mechanically inclined I would call a diesel repair place and have them come out and read the engine fault codes before starting it. If it really is a bad problem and you start it and damage it you could be looking at $15000 to $18000 worth of repair to the motor. It is cheaper to call in an expert.
Mike Canter
"Gunner" USN Retired, Airdale
2004 Monaco Signature 44' Conquest. Detroit 60
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Old 04-23-2012, 06:08 PM   #4
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On my maiden voyage with my Winnie w/the 400 ISL Cummins I got the Stop Engine! light as I started up the Grapevine hill toward LA. I called CoachNet and they ended up towing the coach to a Cummins dealer. Turned out it was only low coolant.

I now have a VMSpc which will interpret the codes for me when this type of thing happens. I agree with Mike and certainly wouldn't drive it while ignoring this.

Good luck and let us know what you find.

Rick, Nancy, Peanut & Lola our Westie Dogs & Bailey the Sheltie.

2007 Itasca Ellipse 40FD
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Old 04-24-2012, 05:46 AM   #5
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Originally Posted by Heater View Post
Same happened to me kind of. It was my oil pressure sensor. Replaced it and all is good.
X2 for me. There are two, one for the ECM to generate the light one for the dash gauge.
Jim and Jennie, Cats=Bittles and Potter, 2000 Dynasty 350 ISC
2013 Silverado 4x4 Towed with R1200GS in bed.
PROV23:4 Do not wear yourself out to get rich; have the wisdom to show restraint.
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