97 rodeo check trans & check engine lights

I just bought a 97 Rodeo - V6 automatic. 106K miles. Runs great, but ocassionally the check engine light comes on, and at same time the check trans light flashes. Mechanic checked - no problems (not sure what code came up), but then both lights will go out at same time. Has happened twice - several weeks between occurances. According to manual, check trans light requires manually shifting of auto trans - but this is not the case with mine. Any ideas?

I think we would need the code.

When was the last time you checked the fluid level? Or changed the fluid?
-Ryan

When I buy something used and with that kind of mileage, I would always change the fluids and filters...usually oil, trans, diff, fuel filters. The last time a check trans light went on, I added some Lucas trans additive and its back to normal again...reset the ECU....

Ryan
Supposedly all fluids were changed, but not sure about trans. Will definitily check them all.

Thanks
If I can get the codes, I will repost.

Call the dealership and give them your vin and ask them if any recalls are open.There was a recall for voltage regulators.They would overcharge and it would cause a check trans light.Try to look at the voltage gauge next time it happens.Carl