On Oct 17, 3:47*pm, (hillclimber)
wrote:
Check engine light on - think it is bad O2 sensor - is there any damage
that can result of running the van with out replacing this sensor? *Only
drive less that 150 miles a month and vehicle seems to be running well
with no change in mileage, etc. *Do not want to fork over the $200 to $350
to replace it right not. *Do any of the auto parts stores read the car
computer for a error code free?

Leaving the gas cap loose or off with motor running can cause the
sensor to go on, it can take a long time to reset, most auto stores
code read for free.