Manufactures program scheduled maintenance into the vehicle’s computer. The monitoring system must be reset to stay on schedule of your vehicle maintenance. These mileage-induced warnings are actually designed to increase your vehicle’s longevity and fuel efficiency. (Some manufacturers utilize the service required light for these types of maintenance issues).

The gas cap may not be screwed down tight. (The monitoring system detects low pressure in the fuel system).

Spark plugs may be misfiring. (The monitoring system detects an irregularity in timing).

Although condensation forms along the pistons during firing, it normally evaporates when the engine reaches operating temperature. However, daily short commutes often cause collected engine moisture because the vehicle is shut off before the engine achieves operating temperatures. Not allowing the moisture to evaporate.

When spark plugs are not the issue, the timing belt, valves, or ignition system may be at fault.

(Usually related to an engine or catalytic converter issue).

The reason for connecting the check engine light to the transmission is to detect transmission issues before they become evident to the driver. At this stage, performing a transmission fluid flush and filter, or even just topping up the fluids to manufacturer’s specs may be all that is required.