I was almost home from an 80 mile road trip when I got a red ABC warning. Pulled over and shut off the car right away. No leaks and resivor was full, but left front corner was sitting low. I started it and hit the ride height button and it came right up. I had 3 people with me and it was starting to rain so I went for the drive home of just a few miles with no highway. I shut off the car at every stop and it felt pretty normal, only noticed a slight bouncy feel once. Noticed it sitting a little low when I got home and shut it off. Restarted it and it raised up again so I pulled it into the garage. Red ABC was on the whole time. No leaks and fluid level still normal. Pulled codes and got this set of faults. The description says if multiple sensors are showing faults, one has a short. I did just put in fresh spark plugs that morning, otherwise nothing but an oil change in the past 9 months. I cleared the codes and rodeod the car for a few minutes and it was working fine, pressure stayed above 160 bar. Any ideas where to start?

Pump was at 190 bar at idle and never went below 160 when during rodeo test.

I'll look at that too, thanks!

Well, it was the simplest possible thing it could have been, corroded positive battery terminal.

I put in the Odessey that's in the car in 2014. Since then I've removed the negative cable several times and never noticed any corrosion there, but the positive hasn't been off since I installed the battery. Corrosion wasn't visible, but when I removed the cable, the terminal looked black rather than shiny metallic. Cleaned it and now no problem...