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Re: Catalatic Converter/O2 Sensor
I hate to quote prices because they can differ so much between regions. The catalytic converter itself is rather expensive, sometimes as much as $400 to 600 US. The O2 sensor itself is probably $100 US or more. Then the labor adds another $250 or more.
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im assuming your talking about the o2 sensor on bank 1 it is usually on a trans axle engine assembly, on the exaust pipe or mannifold closest too you if your looking at the engine compartment you may need to get under the rig to see it but it will be befor the catalitic converter sensor 2 is after the catalitic converter
means HO2S Heater Control Circuit High (Bank 1 Sensor 1).
It means high impedance from O2 sensor, check wiring to sensor and replace the sensor. Check O2 sensor located in bank 1 (cylinder 1 side- see here), and after the catalitic converter (there is also an O2 sensor before cat converter).
You have one on each manifold pre catalitc converter then you have one after catalitic converter sometime the use as many as four one before the catalitic converter and one after this controls fuel trim and tells the computer if the catalitc conveter is working or not. If it has two one before and one after the catalitic converter this is usedd to control overall long fuel trim. the two on each manifold will be heated so the engine will reach closed loop quickly once in close loop this allows for the rest of the engine componets to work, and that includes knock sensor timing advance and ****** and fuel rail pressure more or less depending on readingsform 02 sensors also controls when the egr VALVE comes on, if it comes on too quickly it will cause the engine to get poor fuel mileage and casue spitting out of black smoke from being to rich. Also could plug the catalitic converter and could damage the engine. Thanks for using fix-ya and hope this helps.
Downstream O2 sensor is after (downstream) the catalitic converter on the exhaust pipe. Upstream O2 sensor is after (downstream) the engine exhaust manifold - before (upstream) the catalitic converter. Upstream O2 sensor controls air-to-fuel ratio to yield a small excess oxygen. Downstream O2 sensor assesses the catalitic converter performance.
Well, i know that a took out a bad caat once and the truck ran terrible. So I went and put a new one in and it ran great. The O2 sensors can't read the exhaust gases correctly with out it. It was a Dodge with a 5.2L
The catalitic converter is a mechanical device , it simply converts harmful emissions into water/vapour.
The 02 sensor if faulty would put the engine management light on. If the 02 sensor has been faulty for sometime it could tell the ECU to supply the wrong amount of fuel to the engine which in turn would eventually damage the catalitic convertor.
So you may have to change both in the end, but first I would check out the 02 sensor and replace if required.
Code P0132 is O2 sensor voltage high bank1 sensor 1, P0137 is O2 sensor voltage low bank 1 sensor 2, P1189 indicates a fuel control problem bank 1. It could be either the O2 sensors or a convertor. Could also be intake manifold gaskets. GM had a lot of problems with the lower intake gaskets leaking on the 3.1 and 3.4 engines that was linked to their Dexcool coolant. In fact they just lost a class action lawsuit about it. check with the dealer and see if the intake problem has been taken care of. Hope this helps.
hey if you truely think it is your egr valve unhook it and if that is the problem then when it is unhooked it should run better and the codes should not come up. hey if you cahnged the 1 o2 sensor and not the other you probably made the code for the one u repalced come up again. i would recommened that you change both of the o2 sensors at the same time. try checking if your catalatic convert is plugged. how you do this is take a dollar bill and hold it at the end of your tail pipe while it is idleing and if the dollar bill stays still you have a plugged catalatic converter.