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Topic: Check engine light (Read 611 times) previous topic - next topic

Check engine light

On my 06 Phenix(525ISX) whenever we are set up and encounter alot of rain I will have the check engine light come on when we get under way.  It usually goes off after 30 minutes of travel.  Only seems to happen after a large rain while using the coach.  Happened yesterday after a weekenb of rain on the LSU campus.  It did go off after about 30 minutes of travel and then came back on when we hit a heavy rain.  It also began to have a very week a sick sounding chime rather than the usual dinging but again stopped when the rain quit.  Anyone have experience with this issue?
Gerard Caswell
Eunice, LA
2006 Phenix
2011 GMC Sierra P/U 4x4

Re: Check engine light

Reply #1 –
We had the same problem this spring while driving in a severe wind and rain storm.The check engine light came on and the chiming began.  Totally freaked me out.  Immediately pulled over, shut the engine down and phoned Foretravel and left a message.  This was on a Sunday.  Foretravel called back within fifteen minutes, explained it was probably a relay switch, it was safe to continue driving but head to the nearest Cummins dealer.  We called Cummins who patched us through to the local dealer across the Canadian border in Lethbridge, Alberta.  They suggested we camp in their parking lot for the night and they would get us in Monday morning.

It was explained to me that the transmission speed sensors were at fault! probably with all the moisture getting kicked up.  They recalibrated them ( might have bypassed them) with their computer program.  We were on our way a few hours later with no other problems.  We have not driven the coach since but are leaving for a twenty five hundred mile trip to California next week.  I hope I don't have a recurring issue.
Rick & Colleen
2003 U320 38'
 

Re: Check engine light

Reply #2 –
Quote from: Rick & Colleen –
It was explained to me that the transmission speed sensors were at fault!
That brings to mind an experience we had in our SOB coach that used the Allison MD-3060. While driving in snowy, icy conditions, the transmission went into "limp" mode. The diagnostic code indicated loss of a speed sensor. I found that the weight of an accumulation of ice had pulled a connector from the bottom of the transmission. I thawed the ice, wire, and connectors using a hair dryer. After plugging up the wires, all was well.

Our SOB coach was a 1997 model. If newer transmissions use a similar connection, it could be subject to faults caused by the invasion of moisture. The connection was exposed to road spray and moisture that could make its way into the engine compartment. It might be worth checking the condition of connectors and protection boots on electrical connections on the transmission. Cleaning of connectors and application of dielectric grease might be in order.
J D Stevens
1997 U295 CAI 36' Build #5085
2002 Subaru Outback
Motorcade 16869
Bellville, TX