My friend has a 1984 Peugeot 505 s wagon. It has a lot of weird dials and readouts, but the one we can’t figure out is something called an econoscope. It says “Econoscope” then has three LEDs, but only the yellow one in the center and the red one on the right ever light up. Anybody know what the econoscope is for and what it might mean if the green left LED lit up?
P.S. - There’s another readout called a lambda sensor that’s never lit up before. Any ideas?