Could it be that someone put a voltage divider on the pressure sensor's signal? - Wallace '87 5kcstq 172k > The boost gauge in the dash of my '90 200TQ reads 0.7 bar with the > engine not running. I'm located about 900 ft. above sea level, not > that high. I can get it to show 1.2 bar when driving, while idling it > shows 0.2.