20 Most Recent 2003 Mazda Protege - Page 5 Questions & Answers

Remove the wire from the negative terminal on the battery and wait a few minutes, then reconnect the wire. This will "reset" the computer and remove the check engine light. If the light comes back on, take it to a Mazda service center and let them read the code. They will be able to tell you what is wrong. Pepboys, Autozone....arent always the smartest cookies and are wrong more than they are right.

This will not be a computer problem, this is internal either the clutch packs or bands are going bad

Replace fan switch in dash.Or may even just need connections cleaned with some wd/40. To replace switch you need to remove dash and knob's, Then you have a switch that has the wires from fan to connector. . If these are ok and clean you need to replace your blower motor, Best of luck to you.
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Look at the gas tank filler cap. Make sure the seal in the cap is good. If it is cracked it may be leaking air into the system. Simply replacing the cap usually fixes this problem

Y ou may have a blown head gasket,do not drive.Have towed to a shop and they will find problem.

could be a parasitic drain. http://www.ehow.com/how-does_4924110_car-battery-keep-going-dead.html

I had the same problem with my 03 protege. It worked on speeds 3 and 1 for a while then only on 1 so I took it to the dealer I bought it from. It was the a/c control head which cost $100. Works great now.