How can I replace my Engine Computer or PCM in my 2003 Mazda Protege5?
What is your question?
Yesterday I had a stranger helping me put in a universal heated O2 sensor, and it was giving us trouble since the wires from Mazda didn't match the universal wire colors. He got out a meter and was testing the wires, but accidentally had it on opposite ends (positive on the negative, negative on the positive) and suddenly after that the car wouldn't start. You could tell the car wanted to start, but no matter how many times I cranked it, it wouldn't fully turn over. Do you think the ECM is fried, or could it just be a blown fuse? And if it is the ECM, how could I get it repaired/replaced?
What makes this problem better or worse?
Nothing I do makes the car run.
How long has your 2003 Mazda Protege5 had this problem?
RepairPal Certified shops can diagnose and repair your 2003 Mazda Protege5. They provide transparent pricing with a minimum 12-month or 12,000-mile warranty on repairs and services.
I'm so sorry, but -- this is way beyond your skill set, and I implore you to seek professional guidance.
Do you have any test equipment at all? Can you read what information is being communicated via the engine's processor?
Why is the oxygen sensor being replaced in the first place?
Universal oxygen sensors in general are a horrible idea, for one reason: the fact you have to rewire it.
Please seek professional guidance.
