The Check Engine light recently came on in my new-to-me 2001 Tribute. I purchased an OBDII meter from the local parts store. It read P0136 (IIRC), which translate to oxygen sensor. I purchased and installed 2 Bosch sensors, and cleared the Check Engine light. It seemed to run fine for a couple of days, but the Check Engine light came back on this evening. Any ideas what is up?

 

Well if you have a V6, you have four HO2S sensors. The fault code PO136 is for the rear HO2S sensor on Bank 1, which is in the front of the vehicle. Thats per the Mazda work shop manual. Hope this helps.

 

Hi there, I have read thru some of the other posts for the ck engine light. My Tribute is 2002 w/ 85000 miles. Engine light came on, when I fill the tank and it gets 1 or 2 cold starts the light shuts off, but after about 40 miles of driving it comes back on. I was told to check the gas cap, might be leaking air. So I went to the Auto parts store and they hooked up the little computer @ no charge and the message was P0402 "EGR Flow Excessive". From reading the other posts is the a sensor problem or another part that needs replacing? I am of the female persuasion so appreciate if you can help. I'm not afraid to do things myself and in fact love learning how to fix things myself. Coincidentally, got my oil changed today and vehicle was found to have an Oil Pan gasket leak. I asked the guy at the parts store if I could do it myself. Because I figure buying any specialty wrenches and an oil bucket to catch the oil must be cheaper than having it repaired professionally. He seems to think it would require a large lift and I thought he said lifting the engine out slightly??? I don't mind getting under the vehicle to do this. I have done tune up type things and oil change to our 1995 Miata (may she rest in peace). Do any of you think I could do this. I work 8 - 5 and taking it to be repaired just doesn't fit into my schedule, would love to do this on a Saturday by myself. Any advise or books you recommend? Thanks so much. Marion