Under the hood, drivers side, small square box labeled diagnostics.
It's actually hard to miss.
A check engine code 332 for a 1994 Mazda 626 means that the EGR valve's voltage is lower than it is expected to be. The ERG valve is part of your Mazda's emission control system.
next to the battery
Use a code reader to find out why the check engine light is on.
you will have to get from Mazda or buy a used one
You get a OBD II reader (http://www.nextag.com/obd-ii-code-reader/search-html), which will read the code, tell you what the problem is, and if desired, reset the check engine light. If you don't fix the problem,however, you are not guaranteed that the light will go away permanently.
The engine code is the 8th digit of the VIN.
You need OBD2 reader or scanner to get the codes
Mazda 626 1.8Ltr 1997-2002 Engine code FP Is an interference engine.
p0431 code
using a code reader
GM OBD 1
Overheating can cause some serious engine problems. Once the check engine light is on you need to use an engine diagnostic code reader to find out what's wrong. You can borrow, rent or buy the code scanner from most auto parts retailers.