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Old 08-16-2019, 09:15 AM   #1
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Check Engine Code Help

Just took our new to us 2003 Newmar KS DP on a 1900 mile road trip. I've noticed a check engine light that seems to come on most frequently when the unit is cold/first thing in the morning.. It seems to go on and off when switching from drive to neutral, and or reverse. Also while the Check engine light is on I have no throttle.. (I'm think Throttle Position Sensor)

This is the code I'm getting: ENG SID 254 56 Controller #1

This is being read by my Silver Leaf system..

As said before light will go on and off intermittently and is more prevalent when the engine is cold.. more noticeably like when I'm moving the coach around in my driveway to park it etc... however it did come up on occasion when I was traveling down the highway, but would go off almost as quickly as it came on. As stated before while rolling at low speed in drive if the Check Engine light is on I have no throttle... This is what leads me to believe it's a throttle position sensor???

Any help or insight would be much appreciated. Thank you
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2002/2003 Newmar Kountry Star KSDP 3352
Cummins ISB 300HP, Allison 3000MH
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Old 08-16-2019, 11:14 AM   #2
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Have you tried calling Freightliner in Gaffney, SC? 1-800-FTL-Help

Skip Y
2010 Journey 40TD
WIT 47083, FMCA F263635
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