Having problems with your 2001 Mazda Protege ?
Need computer reset sequence for 2001 Protege LX, 2.0 Liter. I changed plugs, wires, 2 new ECMs and 2 Oxygen sensors. Still with code P 0421 and check engine light on.
Repair Help & Product Troubleshooting for 2001 Mazda Protege
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