Check Engine Light

[Ken Stacer]

We have a 2008 Beaver Contessa 43ft with 4 slides and a Cat C-9 425 HP engine and a 6sp Allison transmission.

Our problem is the "Check Engine Light" comes on intermittently while driving for no apparent reason.  We had this problem checked out when we were in Eugene/Colberg, Oregon where this coach was built in 2008 and the tech support people their could not find what was causing the problem.

Have any of you other Beaver owners experienced this problem???


Thank you

Ken Stacer

[Steven Link]

Ken,
What does your mini Aladdin say when you press the diagnostics? Are you getting any codes? If no codes it could be just a loose connector or wiring issue at the engine or transmission ECM. I had that very problem and it was a loose connector at the engine ECM located on the engine block just above the starter. Ck engine light would intermittently come on generally about 5-10 miles down the road or 10 -15 minutes into travel. No codes and no consistency. It was very frustrating. Made me watch all the engine and transmission parameters instead of paying attention to my driving.
Good Luck and be safe.
Steven Link

[Dave Atherton]

Ken, there could be some meaning behind engine light on and off. Yes it does sound like event code is taking place and when event has past light will go off. Many times at first light will not stay on long enough to
set a event code. The ECM monitors engine operating conditions such as low oil pressure or high coolant temperature. fuel filter restriction etc. If operating condition exceeds the normal condition, a event code is generated. the event will remain active untill the condition returns back to normal. When a output sensor
voltage is between 4.2 volts and 4.8 volts, the ECM will generate an event code ( an or light will come on
than go off) if happening come more and more a event code will be active and a code should be generated. Dave AthertonRetired Cat Mechanic