Quote:
Originally Posted by Drifter
Congratulations - sounds like it has been an adventure so far.
Have you pulled the DPF to inspect & clean it? I'd normally expect to go around 1,000 miles between (rolling) regens on a cross country highway trip - every few hundred miles is a bit of a red flag. Hopefully the thermostat & DEF heater were the problem, but fire trucks & ambulances tend to idle a lot so it isn't unusual for them to start needing DPF replacements as early as 50,000 miles. Still, your engine has pretty low hours for the miles so it definitely didn't idled all the time...
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No I haven't pulled the DPF to inspect it. I did spend a day tracing wiring and pulling out a battery cut-off switch that installed poorly and didn't work. In the process I found the battery terminals were loose on the front battery under the hood. I was hoping that might we a source of my problems - ECU's had poor grounds but it was not to be.
It is not fixed - DFP cleaning message and check engine light came on 500 miles from Denver like clockwork. I made it 200 miles before it hit limp mode just before I got to the Chevy dealer. This time I had to call 5 dealers along my route before one would get me in the same day. The dealer did a forced regen and we got back on the road. 500 miles later the check engine was back on just like clockwork.
With 110K miles on the truck I expected to have to change the DPF. However, I want to make sure that is the actual issue. I don't want to swap it out and then plug up a new DPF. What concerns me is that the truck doesn't even seem to try to do a regen. I get the Exhaust Filter Cleaning message and then 3 minutes later it gives up. There is no way that was a complete regen attempt so something is causing the regen to abort. However, the dealer forced regen works so a regen is possible.