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Car Forum / Mitsubishi Cars / October 2005'02 Galant O2 sensor?
I'm not a "car guy." I change my own oil, radiator fluid, etc....but that's about it. But I'm not a dummy either. My "Service Engine Soon" light came on yesterday, so I took it to the mechanic who says it's a bad O2 sensor. He wants $239 for the part and $45 for the labor. My brother -- who *is* mechanically-enclined -- says that it's something I can do myself. So I'd like to give it a try. In the big scheme of things, how difficult a repair is changing the O2 sensor? Also, the mechanic suggested that before changing the sensor, I might try buying a can of "Berryman's B-12" and running it through a tank of gas and see if that fixes the problem. My question is, if I do this and it fixes the problem, will the "Service Engine Soon" light then go off? I would think that the fault needs to be cleared, even if the problem is fixed. Thanks for your help, ~d. jettster I'd rather know what the code was before making a call, but changing the O2 is not hard. If you have a V6, you have two of them. One for each head. Changing them is really pretty easy on jack stands. You just need a 5 buck O2 sensor socket and a good breaker bar. For a V6, 200 for both sensors is quite reasonable. My problem with this whole thing is that I can't believe a 4 year old sensor has gone bad...and it is actually throwing a code for it. The O2 has to be really dead to throw a code. Go to Autozone and pull the code for free...then report back.  Signature------------------------ > I'm not a "car guy." I change my own oil, radiator fluid, etc....but that's > about it. But I'm not a dummy either. [quoted text clipped - 16 lines] > > ~d. jettster > My problem with this whole thing is that I can't believe a 4 year old > sensor > has gone bad...and it is actually throwing a code for it. The O2 has to be > really dead to throw a code. Go to Autozone and pull the code for > free...then report back. That's interesting. The car's running fine, so maybe it's not a crapped out O2 after all. Good suggestion on the Autozone. I'll get the code, and let you know what I find. Thanks. ~d. jettster >> My problem with this whole thing is that I can't believe a 4 year old >> sensor >> has gone bad...and it is actually throwing a code for it. The O2 has to >> be >> really dead to throw a code. Go to Autozone and pull the code for >> free...then report back. > I'll get the code, and let you know what I find. So here's what I found... Fault Code: P0135. Autozone's analysis: "The PCM has determined that a malfunction exists in the heater circuit for oxygen sensor 1 in bank 1. (Oxygen sensor 1 is closest to the cylinder head before the catalytic converter, while oxygen sensors 2 & 3 are located further downstream and are typically mounted in or after the catalytic converter)." Thoughts? Thanks again, ~d. jettster That's means the car isn't going into closed loop fast enough for the ECU's liking. The O2 has to be hot to start reading and it isn't getting hot fast enough (they have a heater for that). That means replacing the O2 because the heater is built-in. The car should run fine regardless of the O2. It will use air flow, coolant temp, etc...for fuel control. Plus, once the exhaust is hot, the o2 will start working like it should. I'd replace it myself...but I've done it several times. I'd say it would be worth a try if you are slightly mechanically inclined. http://www.autohausaz.com/html/emissions-oxygen_sensors.html http://www.pelicanparts.com/BMW/techarticles/E30-O2_Sensor/E30-O2_Sensor.htm Signature------------------------ > > >> My problem with this whole thing is that I can't believe a 4 year old [quoted text clipped - 20 lines] > > ~d. jettster > That's means the car isn't going into closed loop fast enough for the > ECU's [quoted text clipped - 12 lines] > http://www.autohausaz.com/html/emissions-oxygen_sensors.html > http://www.pelicanparts.com/BMW/techarticles/E30-O2_Sensor/E30-O2_Sensor.htm You've been a tremendous help. I think I'm gonna "give it a go" myself. Autozone quoted me a price of $59 for a Universal o2 sensor, and $106 for the OE. Either way, it pales next to the $300 Firestone wanted. Thanks again. ~d. jettster |
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