what causes the front oxygen sener to keep going bad
2007-04-04 09:56:28 · 5 answers · asked by d_roberts1977 1 in Cars & Transportation ➔ Car Makes ➔ Mercury
I own a shop, and believe it or not, this is a common problem. The front O-2 sensor is closest to the engine, and is the first one to get clogged up. The cause of this is usually the injectors need cleaning. The injectors will clog up, and stick in a partical open position, thus lets the engine have fuel all the time, and not just when the injector fires. This raw unburned fuel reaches the front O-2 sensor, thus clogging it up. If you will have the injectors cleaned, you will see a huge increase in power, and a happy O-2 sensor. I recommend using a bottle of STP fuel injector cleaner (Black bottle only) to 3/4 tank full of fuel every two weeks or every 3rd tank of fuel. This will keep the injectors clean, working properly, and stop the leaking problem. This will also save a lot on your fuel bill. You might want to call around and find a shop that is equipped to clean the injectors. You'll be glad you did, and you will think you are driving someone else's vehicle.
The new vehicles are not rocket science as some of the tech's lead you to believe. Scanning the computer only tells one where to look (most of the time), and not what the actual cause of the code. Monitoring sensors is the way to go, but most techs don't know what they are reading, as in don't know good numbers from bad numbers. If one doesn't know the good from the bad when monitoring the range of any sensors, then they are back to guessing. A scan will tell you the O-2 sensor is out of range, rich or lean, and will tell you if the sensor is good or bad, but this is where it stops short. You already know this! You are back to finding the mechanical reason for the sensor going bad, or the computer is bad and feeding you false information. You are now back to where you started. An O-2 sensor goes bad from contamination from either too much fuel, getting coolant into the exhaust, or oil going into the exhaust system. Find which one it is, and you have found the problem. I don't think scanning the computer will tell you the rings are worn out. You must have scanned the computer to already know the O-2 sensor is bad. We can all guess at the cause, but from experience, I have seen this caused by injectors many times, and I base my answer on this experience.
Glad to help out, Good Luck!!!
2007-04-04 23:58:03 · answer #1 · answered by Anonymous · 0⤊ 1⤋
What tells you it,s going bad? I understand that one might go bad but the same one?Part replacement is not the proper repair Something else is causing this.First you have to find what is causing this concern Have you had the sensor monitored to see if they are switching proprely .Have the fuel trims checked .Your engine could be running rich or lean and the sensor would be reading this .Mass air could be dirty. causing these conditions ..Have it scanned and diagnosed at a competent shop that know what they are doing ..
2007-04-05 20:32:55 · answer #2 · answered by auto tech25 3 · 0⤊ 1⤋
Is it the same sensor and how often does it go bad? It could be ignition problems or fuel problems if this keeps happening.
2007-04-04 17:01:00 · answer #3 · answered by Fordman 7 · 1⤊ 1⤋
either bad parts from the manufacturer, or too lran of an air fuel mix
2007-04-04 16:59:42 · answer #4 · answered by duster 6 · 0⤊ 2⤋
it is possible that u ran into a bad batch if u got them from the same place. i heard bosch o2sensors suck.
2007-04-04 22:18:26 · answer #5 · answered by robert s 5 · 0⤊ 2⤋