oxygen sensor

A few weeks ago, the CEL came on. I took it to Advanced Auto, they gave me the code, went to the mechanic, and he said that it was one of the oxygen sensors. I paid for that repair, and by the time I came back home, the CEL was back on. I took it back, they said nothing was wrong with the...

I am new to these forums and I am trying to figure out how to navigate them (on my phone...no pc), so forgive me if this has already been addressed. I feel somewhat confident in my abilities working on my cars as I do most routine basic maintanance. But money is tight, and I need to replace (I...

Hello Everyone: I have been ignoring check engine light for sometime now and I need to have this fixed sooner now as it will come up more frequently. I got the following code when checking via ODB2 reader. Code: P2251 (Open - BANK 1) Code: When i went in to search for oxygen sensor, I got...

My 03 Mazda Protege5 has 4 codes coming up. I'm wondering if they are all related or separate issues. The biggest is P0303 cylinder 3 misfire. Pulled the plug and it looked burnt around the bottom as well as a little charred above the nut. Replaced it but it still feels rough on 10 mile test...

Hi! Protege5 with check engine light on due to Bank1 lower than treshold but no more consumption than before. I kept it like that for more than 2 years before I decided to try the Non Fowler Trick. The check engine went off. Then, it started to drink like crazy. I've tried to reduce the Non...

Hey I recently got a P0031 check enginde code which refers to overheating in bank 1 sensor 1. So I wasnt sure exactly which oxygen sensor this was, is this the one right on the front or underneath the car? Also I was trying to unplug the oxygen sensor and the actual electrical plug is so hard...

My 2007 CX7 hesitates and the dealer checked the codes, concluding the oxygen sensor needed to be replaced. They wanted $390.00 - for the job. I presented him with a TSB stating a faulty oxygen sensor was a known issue but to no avail. He stated my car was out of warranty at 47,000 miles. Has...

I just got a PO421 for the fourth time and finally, i am giving into the fact that i cant just keep resetting my cel. I need to do something about it. What have you all done to make this problem go away? I'm thinking of just going cat-less soon, so is there a way i can relay the catalytic O2...

Hi all, My car is a Protege 2002, ES, 2.0L engine. Initially, I got P0300, then I got a bliking CEL but had to drive, then changed the spark plugs and the CEL went away. But after a few miles at ca 50mph, I got a new CEL. I got it checked today and got the dreaded P0421. It might be...

Check Engine Light (CEL) System Too Lean (Bank 1) Re: 2003 Mazda Protg5, 46,800 miles, All Stock. The CEL came on, took car to Auto Zone, got code - System Too Lean (Bank 1). I call my maintenance Mazda Dealer and they wanted over $300.00 just to change the Oxygen Sensor. I replaced the...