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Problem fixed! Turned out it was the both of the O2 sensors!

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-wonderful!!
-thanks for the update

-those pesky o2 sensors can be so finiky sometimes

-glad it worked out for ya
-just proves that the 'fix-ya' system allows for great exchange of ideas for people to fix their issues

bearb

Posted on Nov 13, 2008

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1996 Oldsmobile LSS. Went to autozone and got code PO133. 'Fuel system running rich or lean- check other aacodes first.' and 'Oxygen sensor defective'; The guy said it probably isn't the oxygen sensor; as...


code P0133 is : o2 sensor circuit slow response (bank 1 sensor 1)
meaning;;;one heater on o2 sensor is not heating fast enough or no heat.
look for o2 sensor heater fuse first
and connector wiring for rust
if ok change o2 sensor

Oct 17, 2013 | 1996 Oldsmobile LSS

Tip

How to Replace the O2 Sensor in a Buick Century Car?


O2 sensor needs to be replaced when you get low gas mileage in car.
The procedure to replace is as follows: ----
1) The oxygen sensor is located under the car.
2) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
3) The sensor has to be turned a bit then it can be easily removed.
4) Most of the times the O2 sensor comes out very easily but if its bit hard to remove it then you can use "FREEZE spray" to make it gets loose.
5) The spray will make it come out easily.
6) When the O2 sensor is getting removed, some of the wiring's will also come out.
7) Before removing the O2 sensor, take the note of the wiring's and the position of wiring so while inserting new O2 sensor you don't get confused.
8) Now after you remove the old faulty O2 sensor out. Carefully insert new O2 sensor in same position.
9) And reverse/refit all the wires / parts which you removed while replacing the old O2 sensor.
This will help. Thanks.

on Mar 22, 2010 | Buick Century Cars & Trucks

Tip

How to Replace the O2 Sensor in a Audi All road Car?


O2 sensor needs to be replaced when you get low gas mileage in car.
The procedure to replace is as follows: ----
1) The oxygen sensor is located under the car.
2) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
3) The sensor has to be turned a bit then it can be easily removed.
4) Most of the times the O2 sensor comes out very easily but if its bit hard to remove it then you can use "FREEZE spray" to make it gets loose.
5) The spray will make it come out easily.
6) When the O2 sensor is getting removed, some of the wiring's will also come out.
7) Before removing the O2 sensor, take the note of the wiring's and the position of wiring so while inserting new O2 sensor you don't get confused.
8) Now after you remove the old faulty O2 sensor out. Carefully insert new O2 sensor in same position.
9) And reverse/refit all the wires / parts which you removed while replacing the old O2 sensor.
This will help. Thanks.

on Mar 22, 2010 | Audi AllRoad Cars & Trucks

1 Answer

Vsc abs track off


Sounds more like the alternator and I wouldn't think the o2 sensor has anything to do with it. That's part of the emissions.
Hope this helps

Nov 27, 2012 | 2003 Toyota Avalon

5 Answers

My Service Engine Soon light came on about a year ago. I took it into the shop and got that problem fixed but the light stayed on, so I took it to advance auto parts and code tested it and it said that...


There are several types of O2 Sensor codes. There can be "Lean O2 Sensor" codes, "Rich O2 Sensor" codes, "O2 Sensor Slow Response" codes, or "O2sensor Heater Circuit" codes. The specific code that is being set changes the way you must go about diagnosing and repairing the problem. I will say however, that in about 80% of all the O2 Sensor code problems that I have had to diagnose, the O2 Sensor itself was NOT the problem. The O2 Sensor was only reporting a problem that was actually caused elsewhere. O2 Sensors are the final checkpoint in the engine management system. I think of them like a report card. If the O2 Sensors are right, the rest of the engine management system is right. If the O2 Sensors are not right, the rest of the engine management system is probably not right. (Except in the 20% of the cases where the problem is actually being caused by a failed O2 Sensor)

Dec 04, 2010 | Mitsubishi Galant Cars & Trucks

Tip

How to Replace the O2 Sensor in a Chevrolet Cavalier Car?


O2 sensor needs to be replaced when you get low gas mileage in car.
The procedure to replace is as follows: ----
1) The oxygen sensor is located under the car.
2) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
3) The sensor has to be turned a bit then it can be easily removed.
4) Most of the times the O2 sensor comes out very easily but if its bit hard to remove it then you can use "FREEZE spray" to make it gets loose.
5) The spray will make it come out easily.
6) When the O2 sensor is getting removed, some of the wiring's will also come out.
7) Before removing the O2 sensor, take the note of the wiring's and the position of wiring so while inserting new O2 sensor you don't get confused.
8) Now after you remove the old faulty O2 sensor out. Carefully insert new O2 sensor in same position.
9) And reverse/refit all the wires / parts which you removed while replacing the old O2 sensor.
This will help. Thanks.

on Mar 22, 2010 | Chevrolet Cavalier Cars & Trucks

2 Answers

1998 Saturn SL2 engine light


Possible Causes
The following are malfunctions that could cause a rich condition:
^ Fuel pressure too high. Perform fuel pressure test.
^ Leaking fuel injector(s). - Perform pressure leak down test.
^ Vacuum leak around the MAP sensor grommet.
^ Oxygen sensor contamination.
^ Restricted exhaust or air intake.
^ Fuel Vapor Canister saturated with fuel.

IMPORTANT:
If the front oxygen reading voltage is above 600 mV and the rear HO2S is above 600 mV all the time, the O2 sensors are probably not
at fault.

Sep 22, 2009 | 1998 Saturn SL

2 Answers

99 Silverado ''Service Engine Soon''


One of 3 things happened. Either you have a loose o2 sensor connection, You got some bad gas and it gave it some funny readings, or your o2 sensor is going out. When you have an intermittent problem in your o2 sensor. Well, think of it like this. When the lights off, you're probably getting 19mpg, when it's on you're getting 12mpg. Replace it, and you should bump back up to your 24mpg. That's about all that code will do to you. It's your call from here.
Calvin

Apr 23, 2009 | 1999 Chevrolet Silverado 1500

2 Answers

Location O2 sensor after cat for Mazda Miata 2002


Just had BOTH of my O2 sensors replaced in my 2002 Miata.  The sensors are located
1. at the back of the engine compartment look down (on the passenger side ) You should see a spark plug looking device near the bottom of the engine (on the side) it has a short wire output that goes to a connector looking device on the other end. This O2 sensor had a short wire connector on the other end
Probably can be replaced from the top.
2.  This one is tougher --- From underneath the vehicle just after the catalytic converter  you should be able to see the Spark plug like O2 sensor .  The person who repaired it for me had to trace the wire from the O2 sensor.  It goes up into ( perhaps the frame or bottom of the vehicle INTO the Driver compartment under the drivers seat.  It is located near the Center Console  right at the carpet seam. It was about in a straight line from the BACK of the Drivers side Car Door.  He felt around -- and located the Connector (under the carpet near the center console. .  He checked underneath the car to the point where the wire disappeared --to confirm he had the correct wire.  
Once he located where the sensor wire led to --He had the old sensor out and wire connector disconnected and a  New sensor and the connector installed in about 10 minutes.  
The O2 sensor for this one was much longer than the first O2 sensor in the engine compartment He had to use some sort of standard release spray on the old sensor itself --to remove the old O2 Sensor.   Since it is exposed to the elements under the car.   Wrench, I think a screwdriver  and the spray were all the tools I remember him using.....

The autozone code indicated only the engine compartment sensor was bad.
The repair man told me Both usually go bad at the same time.  
I fixed the first one only -- turned out the warning light lit up a day or so later indicating the second O2 Sensor under the vehicle was bad.  Fixed that as well -- have had no problems since -- repair was about 4 months ago.....

Mar 23, 2009 | 2002 Mazda Miata

1 Answer

Locate O2 Sensors in 1994 Cadillac ElDorado


o2 will not make your car do that you have other issues check for secondary ignition miss or primary ignition miss sounds like you are dropping a cylinder dumping raw fuel to contaminate 02 sensor find the real problem to fix your light

Nov 22, 2008 | 1994 Cadillac Eldorado

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