If the oil pressure warning lamp is on or flashing, this indicates insufficient oil pressure in the system. Remove and check the valve.
Unscrew the stopper (1).
Remove the spring (2) and piston (3).
Check piston free play, clean if necessary, replace piston. The pistons should show signs of wear.
Insert the piston and spring, place a new aluminum or copper o-ring under the plug and tighten.
2.0 liter engine:
- To remove the elements of the pressure reducing valve, remove the oil sump and, unscrewing the plug (1), remove the spring (2) and piston (3).