How do I check my automatic gearbox oil On my Peugeot 406 2002 model?

To check the automatic gearbox oil on your 2002 Peugeot 406, first ensure the car is on a level surface and the engine is running at idle. Locate the transmission dipstick, usually found near the back of the engine bay. Remove the dipstick, wipe it clean, reinsert it fully, then remove it again to check the oil level; it should be within the marked range. If low, add the recommended type of fluid through the dipstick tube.