Sensor cleaner and/or tissue digester. Fill tank until you see it coming up the pipe at the toilet, let it set for a day or two. Then drive “rough” for a few miles.
If that doesn’t work, you can replace the sensor.
Here we go
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2012 Copper Canyon 273FWRET being towed by a 1994 Ford F350 CC,LB,Dually diesel.
Airlift 5000 bags, Prodigy brake control, 5 gauges on the pillar.Used to tow a '97 Jayco 323RKS.
Now an RVIA registered tech. Retired from Law enforcement in 2008 after 25+ yrs.
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