My son's '94 Caravan 3.3 has a recurring MIL display while diving.
After shutting vehicle off it resets itself and then comes on again
after a few minutes, usually on highway driving.
Cycled the key to read codes, it displayed the following (in this
12 Memory standby power recently lost
32 EGR diagnostics
31 Purge solenoid circuit
55 End of test
The vehicle seems to run and drive perfectly normal, even when the MIL
is lit, which led me to believe from the beginning that the issue is
predominately an emissions issue. The battery hasn't been disconnected
Aanyone know of a common problem with this year and engine to look for