Hello,

I just took over a 10 truck account of 8 series Toyota units. The new management team said service on these units was oil change only, no filter change (why, I have no clue). Anyway, I just changed the oil/filter on these unit and the oil fault (looks like a teardrop) light is still on. Every unit they have has this fault light on on the display. Any remedies would help. I disconnected the batteries to try and clear the fault light and it stays on. Thank you in advance!