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Old 11-23-2020, 02:38 PM   #1
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Holiday Rambler Owners Club
Join Date: Jan 2017
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Warning Light- Intermittent

I have a 2001 Holiday Rambler w/cummins ISB300. Dash light comes on goes to limp mode then (sometimes) goes out on its own. Local shop has checked for codes-none showing. Changed TPS, MAP, and IAT all fluids ok. Whats next ECM, VP44(I hope not)? HELP
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Old 11-23-2020, 03:41 PM   #2
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Join Date: Apr 2011
Location: Powell River, B.C.
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Investing in a dash board read out for codes ; SilverLeaf , Scangauge D ; so you can get codes as they happen , before you spend any more $$$ on un-necessary parts replacement.

Coolant level sensor would have been my first choice for a sensor replacement , but there should have been a second dash light ; Low Coolant : and " CEL "as well as the de-rate.

From my experience with Cummins , ECMs and VP-44s , they are seldom intermittent failures , once they go bad
99DSDP 3884, Freightliner, XC, CAT 3126B, 300 HP /ALLISON 3060
2000 Caravan toad, Remco & Blue Ox.
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Old 11-23-2020, 05:19 PM   #3
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My first step would be to check level of coolant overflow tank.
2002 Monaco Executive 500 ISM
2004 GMC 2500HD 4X4
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Old 11-23-2020, 06:28 PM   #4
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Thanks to all. Coolant sensor checked good. Shop had checked ECU when warning light was on-no codes. Used Scan D. Lift pump has 15psi at idle, 10psi WOT. Fuel filters were changed twice to make sure.
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