So my old bus gets the occasional lean (1995 p38 with STC rear sensors) - when it happens its always low on the left side at standard height by about 20mm front and rear.
Reading nanocom there are no faults, but I consistently get the front sensors both reading at around 148 (the configured value for high) all good. Rears at 133 both equal side to side.
But on standard I get a reading of 126 left and 136 right front sensors. Rear sensors are equal 118 side to side.
When I drop to low and access things balance up again.
Reading the following
(EAS first adjusts the rear end to the target heights. Next, the front is moved to approximately where it should be. Then, the two front air bags are connected (both their valves open, but no air supplied or removed), so they can even out their pressure. Finally, the cycle is repeated, until a condition is achieved where the two rear sensors read exactly their preset target values, while the front ones are off in such a way that one of them is above, the other below target, and both by are off by the same amount.)
I decided to swap the rear sensors side to side and....exact same thing - tears balanced at both std and high with front left 10 less than right. Iâ€™m going to swap the fronts next - but is this likely that the front left has a deadish spot? I ask because the PO said right rear was suspect but the problem has not moved when I have swapped them?