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04-17-2017, 11:44 AM
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#1
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Member
Join Date: Apr 2017
Posts: 32
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Monaco Cayman warning light on.
My wife and I purchased this motorhome in November 2016. The first trip was 250 miles with no problems. The second trip 150 miles with warning light on the whole way. Unit is 2002 Monoco caymon with ISB 5.9 cummins. I have changed both fuel filters, did not change-light still on. I also checked all fluid levels all ok. Does this light set a fault code and can I retrieve it myself?
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04-17-2017, 11:48 AM
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#2
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Senior Member
Outdoors RV Owners Club
Join Date: Oct 2016
Posts: 1,804
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Someone from the Monoco owners forum may stop by.
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2018 ORV 24KTS 30,000+miles
2017 Ford 3.5 TwinTurbo w/MaxTow
640 Watts solar/600 Ahr
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04-17-2017, 01:11 PM
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#3
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Community Moderator
Newmar Owners Club
Join Date: Feb 2011
Location: Point Pleasant Beach, NJ
Posts: 31,553
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Glad to have you here in the forum with us. 
Sorry I can't answer that question for you.
Happy Trails!!!
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Tony & Ruth........... FMCA#F416727
2016 London Aire 4519, Freightliner chassis, Cummins ISX, 2018 Jeep Wrangler Unlimited, Blue Ox Avail with AF1. TST 507 TPMS
No amount of money can buy you an extra second of time.
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04-17-2017, 02:36 PM
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#4
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Senior Member/RVM #90
Monaco Owners Club
Join Date: Nov 2002
Location: Columbus, MS
Posts: 54,785
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Hi !  Welcome to IRV2! We're sure glad you joined the gang!
Congrats on the new rig! Sorry I can't help with the question. Keep her between the ditches!
Good luck, happy trails, and God bless!  
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Joe & Annette
Sometimes I sits and thinks, sometimes I just sits.....
2002 Monaco Windsor 40PBT, 2013 Honda CRV AWD
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04-17-2017, 03:58 PM
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#5
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Senior Member
Join Date: Jul 2016
Posts: 105
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warning light
Hi I have a cummins 6.7 and the warning light came on it was the egr valve stuck open not a big deal it is part of the exhaust emission system. they told me ok to drive back to oregon from az. easy fix just not a cheap part. a dealer or repair shop can read the code for you. good luck
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04-22-2017, 10:56 PM
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#6
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Senior Member
Join Date: Jan 2008
Location: D/FW Texas
Posts: 767
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Which warning light is on? I've had the check engine light come on twice on my 2003 Cayman in 14 years. 1st time it was a problem with the EGR valve. 2nd time, just recently, the turbo speed sensor was bad. But to answer your question, yes, with the light on, there could be a problem code stored in the ECM. If you have the Cummins diagnostic software and hardware you can get the code. If not any Cummins repair shop should be able to diagnose the problem.
If it's the EGR valve it will blow heavy black smoke out the exhaust on acceleration and clear up as you get up to speed. There are several sensors on the engine that can trigger a check engine light also. Even though your fluid levels may be topped off properly, one of the fluid level sensors could be bad. One of the most common is the coolant level sensor. The probe end can get corroded in the reservoir tank or the wiring for the sensor can get damaged or corroded also.
Mike H
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Mike & Debbie
2003 36' Monaco Cayman
2007 Saturn Vue "pusher"
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04-25-2017, 12:27 PM
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#7
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Member
Join Date: Apr 2017
Posts: 32
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Mike H Its the red warning light on only. yellow check engine light has never came on except at start up and goes off. this is keeney junior member
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04-25-2017, 11:37 PM
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#8
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Senior Member
Join Date: Jan 2008
Location: D/FW Texas
Posts: 767
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That warning light is for an out of range condition for the engine protection circuits according to the manual. I would not continue to drive it until you get can get the cause of the light checked out. Continued driving could cause damage to the engine. I've never had that light come on, so I can't be of much more help. Wish you luck in getting it figured out, hoping it's nothing serious.
Mike H
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Mike & Debbie
2003 36' Monaco Cayman
2007 Saturn Vue "pusher"
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04-26-2017, 03:07 PM
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#9
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Member
Join Date: Apr 2017
Posts: 32
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we live about 80 miles from nearest repair facility. If I knew if the monoco engine platform such as J1939 I would buy a code reader to check it before driving it. I am a retired Chrysler tech. and can fix a lot of it myself. At least I could determine if it was safe to drive. Any ideas? Anybody.
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04-26-2017, 04:13 PM
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#10
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Senior Member
Join Date: Jan 2008
Location: D/FW Texas
Posts: 767
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keeney, you might look into purchasing a ScanGage D engine monitoring unit to see if it will give you a code. Just be aware that on our engine/trans setup the ScanGage does not read as many parameters as it does on larger engine/trans combo's. Also the codes the ScanGage provides are different from the Cummins codes listed ISB fault codes list. But you can get the Cummins equivalents from ScanGage. You can purchase one at most auto parts stores, Amazon; etc. If you don't have the fault code list you can google it.
Mike H
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Mike & Debbie
2003 36' Monaco Cayman
2007 Saturn Vue "pusher"
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04-27-2017, 06:10 PM
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#11
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Senior Member
Monaco Owners Club
Join Date: Feb 2011
Location: Signal Hill, California
Posts: 3,320
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I had the turbo speed sensing unit go bad and had it replaced at a Cummins shop. It can also cause your engine to go a short distance and STOP. I have a Scangauge D, but I never figured out the codes. Now I will google the Cummins equivalent. Thanks guys...
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Sanford, Linda & R cats: Molly, Levi, Cody
2011 Monaco by Navistar RV
Good Sam Life Member Good Sam Hams Chapter
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04-27-2017, 10:34 PM
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#12
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Senior Member
Join Date: Jan 2008
Location: D/FW Texas
Posts: 767
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Your welcome Sanford. Hope it helps. I too had the turbo speed sensor go bad. It was causing an intermittent check engine light on my ISB300. Tech said it hadn't gone completely out, but when it did, it would either derate the engine or cause it to shut down. I don't think either would be good. 
Mike H
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Mike & Debbie
2003 36' Monaco Cayman
2007 Saturn Vue "pusher"
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04-27-2017, 11:45 PM
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#13
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Senior Member
Monaco Owners Club
Join Date: Feb 2011
Location: Signal Hill, California
Posts: 3,320
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Can someone post the link to the Commins code "translations" from the ScanGuage D?
__________________
Sanford, Linda & R cats: Molly, Levi, Cody
2011 Monaco by Navistar RV
Good Sam Life Member Good Sam Hams Chapter
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05-05-2017, 12:39 PM
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#14
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Member
Join Date: Apr 2017
Posts: 32
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Well fellow RVers I took my monoco to an repair shop, 9:30 am appointment , 4:00 pm that afternoon they said my Ambiant air pressure sensor was bad. Diag. 155.00 dollars. they did not have one and would have to order it at a cost of160dollars and another 150 dollars to install. I have not made up my mind yet. I looked every where for the sensor cannot find. Any clues anyone?
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