2019 Western star, DD13, the hot exhaust light is flashing slow at idle, about once every 8 to 10 seconds. This is the HEST light, NOT the DPF light.
Seems like it surges or runs a little rough at times unless I set it to 900 RPM, the highest it will go.
2019 Western star 5700, Hot exhaust light flashes at idle
Discussion in 'Western Star Forum' started by loose_leafs, May 24, 2021.