what about the p0420 not effecting any pcm/performance ?
Other than of course the possible clogged cat thing, which i then have a good excuse to gut
...... I realize this is a rear, upstream, 02 sensor...
Bank 2 sensor 1 is the front upstream sensor. This is the one next to the oil filter. Removing the oil filter will give you more room to maneuvre.So.. my car threw P0153 and P1151 again... looks more and more like Bank 2 Sensor 1 is going out... I realize this is a rear, upstream, 02 sensor... problem is I'm looking at rock auto's website... and I'm having a hard time figuring out exactly what to get...
I'm looking under this heading...
1999 FORD CONTOUR SVT 2.5L 2450cc 155cid V6 FI (G) : Emission : Oxygen Sensor
Bank 2 sensor 1 is the front upstream sensor. This is the one next to the oil filter. Removing the oil filter will give you more room to maneuvre.
You don't need an exhaust diagram to locate this sensor.Seriously... oh... I was trying to find an exhaust exploded diagram, but I can't seem to find one...
You don't need an exhaust diagram to locate this sensor.
Stand in front (and about the center) of your car with the hood open. Look down at the space between the radiator and engine. To the left of the center, you will see an oil filter. You should also see the upstream O2 Bank 2 sensor to the left of the exhaust manifold.
The O2 sensor on the right of the exhaust manifold is the Downstream Bank 2 O2 sensor.
Bank 1 and 2 Upper are the same...are the O2 sensors all the same plug... or does it vary by location?
I disagree. I would suggest changing the two upper sensors but not changing the two lower sensors until it stops working...I would recommend changing all the sensors at the same time. ...
The reason I suggested to replace all 4 sensors is that the car has 169K on the dial. My assumption is that all of the sensors have gone the same amount of miles. Generally the recommended change is 80 to 100K for the best performance and mileage. This may be a good idea or not. I don't know how many posts that I have read that people complain about O2 sensors that don't work. If you can't handle the price for changing all for at the same time I would agree that the sensors should be replaced in pairs. In my personal & company vehicles (total of 9 rigs) I almost always change parts like plugs, wires, shocks, tires, belts, hoses, brake componets, steering componets in the full number of the parts. Typically if one goes the rest are not far behind.
Some people are reluctant to just drop $240 to replace all 4 O2's then spend the time doing the install..[/QUOTE said:I completely agree the the cash outlay sucks!! The cost of the sensors seem excessive to me. As far as the time issue... I would rather get out my tools, jack it up, put it on stands one time rather than four times. But to each his own. I really do hope that replacing 1-2 or 4 improves your ride.
The idea of replacing all four O2 sensors is dumber than a bag of cheap, imported hammers.
Replace the upstream pair if you want to, leave the two downstream ones alone until they code out.
Me, I replace the sensors one at a time when they no longer work right. Can't argue with 175K miles.
Steve
Bank 1 and 2 Upper are the same.
Bank 1 and 2 Lower are the same.