We drove our coach 113 miles, about two hours of driving, from Cummins Coach Care in Coburg, Oregon towards our our home base, but turned around in Salem when the Check Engine and MIL lights came back on with the same error code.

Here’s a map showing our route, heading north then back south:

An interactive map, with the rest area pinned:

Our coach backing into a Coach Care service bay:

We spent the day in the customer lounge:

Second breakfast at Chick-fil-A:

We parked our truck behind the lounge, and turned on our smaller Bluetti battery, so we could use our truck’s Starlink Wi-Fi (the Wi-Fi in the lounge was not very fast):

Our coach emerging:

Parked for the night:

Doing an engine regen:

Heading out again, full of hope:

We stopped at a rest area, to see if that triggers the issue, as it had before:

Alas, it did:

So we turned around at the next exit, and headed back to Cummins:

We stayed the night again, then had Dutch Bros Coffee for breakfast while they looked at the coach again:

And later, went to the cafe at the nearby truck stop to have breakfast for lunch:

That afternoon, we had more news: the engine’s turbocharger was damaged (which I had suspected based on Facebook posts). The tech showed a scope shot of the damaged turbo:

So, this repair just got way more expensive; about $11k to replace that and the actuator, including labor. Sigh. But at least they finally found the root issue!

We left our coach there, and drove our truck home, while they ordered in the part, and did the work.

We drove our coach 255 miles, about five hours of driving, from Cummins Coach Care in Coburg, Oregon to our home base near Shelton, Washington.

Here’s a map showing our route, heading north:

An interactive map, with potential stops pinned:

Our coach parked at Cummins:

Helpful tip:

Preparing to leave:

Heading to I-5 North:

Roadworks:

Exit to I-205:

Entering Washington:

Closed rest area:

Bump:

Fuel stop:

Soon after the fuel stop, about three hours (200 miles) after leaving Cummins, the Check Engine and Malfunction Indicator lights came back on, with the same SPN 102 FMI 18 fault:

At that point, we decided to just continue home. The exit to Shelton:

City limits of Shelton:

Welcome to Shelton:

The SPN 102 FMI 18 fault code on the dash:

Back to Cummins after the weekend!

Jenn drove our coach just 13 miles, about 20 minutes of driving, with me following in our truck, from Oregon Motorcoach Center in Eugene to Cummins Coach Care in Coburg, Oregon.

Since OMC didn’t have any luck figuring out the check engine fault issue, and I noticed that Oregon’s only Cummins Coach Care facility was just across town, we decided to take our coach there. Cummins is the manufacturer of the engine (and generator), and they have better diagnostic tools. If they couldn’t solve it, nobody could.

An interactive map:

Following the coach:

Arriving at Cummins:

A tech reading the codes from the diagnostic port in the engine bay:

They couldn’t investigate the issue(s) for a few days, so once again we left the coach and headed home. Fortunately, they have electrical hookups available:

Our site:

The place was practically deserted at the time, with no other RVs parked outside (there may have been some inside their shop, though).