Engine light is on 2003 Mazda mpv?

Answer 1

Not sure what you are asking, but mine has come on sometimes too. It records the reason for the light in the computer, which is read with a special plug in reader under the dash. The mechanic can then look up the codes for cause and diagnosis.

Generally from my customer experience (not a mechanic), if it stays on and does not reset itself, take it in for diagnosis. This is especially true if it starts flashing. Mine were a series of ignition coil failures, that reset a couple of times and the the part failed for good (no power and risk of further damage). The coils are a pain because they are $100 + each, and 3 of 6 are located under the back of the engine under the spark plugs and are not self serviceable.

If one fails in the backside, be sure to change the plugs (and any newer coils from the front), cause it's a 2-3 hour job to get at them.