oil pressure sending unit could need replacing, or you could have low oil level. I recently had to replace my sending unit after putting too much lucas oil stabilizer in.
It would be very rare for a P1684 code to turn the light on.
It might be that your pcv valve is plugged or the egr valve is sticking.
Warped rotor(s).
out of brake fluid?
depending on the year I have had issues with a 1990 and a 1992 grand caravan problem was the light in the glove box the contact would turn the light on periodically draining battery
The most likely cause would be low fluid level.
A Grand Caravan would have a six cylinder.
A Grand Caravan does not have a timing belt.
A grand caravan would have the 4 speed transmission, which is not cable controlled. It is all electronic.A grand caravan would have the 4 speed transmission, which is not cable controlled. It is all electronic.
A Grand Caravan would have the 41TE transmission which does not have a throttle or kickdown cable.
Any signs of water in fixture or socket?
the wheel has to get changed you ediot