Question about 1997 Toyota Previa

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TOYOTA PREVIA CDX 2001. HAS HAD ENGINE LIGHT ON FOR A YEAR OR SO - GARAGE SAYS IT IS ONE OF FOUR OXYGEN SENSORS ON CATALYTIC CONVERTOR - BUT THEY DO NOT KNOW WHICH ONE. ALSO IN LAST MONTH OR TWO - OCCASIONALLY WHEN HOT - ENGINE RELUCTANT TO START OR IDLE OR ON BLIPPING THROTTLE ENGINE REVS AND THEN DIES. BUT AFTER 2-3 MINUTES OF LIGHT REVVING THEN ALL OK AGAIN. ps: it is a 2001 model - not 1997

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That sounds like a faulty 02 sensor. Technically speaking as a mechanic myself, I suggest that they all be of the same age for computer to read correctly. It is expensive but well worth it.

Posted on Sep 23, 2009

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How any oxygen sensors are on a 1999 grand cherokee laredo 4.0 & were is it/they located?


On Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines, check this diagrams...


12_18_2011_2_25_33_pm.jpg


12_18_2011_2_26_23_pm.jpg

The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the emission package, the vehicle may use a total of either 2 or 4 sensors.

Federal Emissions Package (4.0L and 4.7L engines):
Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.


California Emissions Package (4.0L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the rear/upper upstream sensor (2/1) is located in the exhaust downpipe just before the rear mini-catalytic convertor. The front/upper upstream sensor (1/1) is located in the exhaust downpipe just before the front mini-catalytic convertor. The rear/lower downstream sensor (2/2) is located in the exhaust downpipe just after the rear mini-catalytic convertor, and before the main catalytic convertor. The front/lower downstream sensor (1/2) is located in the exhaust downpipe just after the front mini-catalytic convertor, and before the main catalytic convertor.


California Emissions Package (4.7L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Dec 13, 2011 | 1999 Jeep Grand Cherokee

1 Answer

P0171


Ho Joanne:
On Grand Cherokee oxygen sensor locations for 4.0 and 4.7 engines, check this diagrams...


12_18_2011_2_25_33_pm.jpg


12_18_2011_2_26_23_pm.jpg

The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the emission package, the vehicle may use a total of either 2 or 4 sensors.

Federal Emissions Package (4.0L and 4.7L engines):
Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.


California Emissions Package (4.0L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the rear/upper upstream sensor (2/1) is located in the exhaust downpipe just before the rear mini-catalytic convertor. The front/upper upstream sensor (1/1) is located in the exhaust downpipe just before the front mini-catalytic convertor. The rear/lower downstream sensor (2/2) is located in the exhaust downpipe just after the rear mini-catalytic convertor, and before the main catalytic convertor. The front/lower downstream sensor (1/2) is located in the exhaust downpipe just after the front mini-catalytic convertor, and before the main catalytic convertor.


California Emissions Package (4.7L engine):
On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.

Thank you for using Fixya, and have a nice day.

Dec 13, 2011 | 1999 Jeep Grand Cherokee

2 Answers

I have 4 oxygen sensors 1 is bad code po431 bank 2 is the upper or lower sensor


DESCRIPTION The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the engine or emission package, the vehicle may use a total of either 2 or 4 sensors.

On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

Left and right are distinguished by sitting in the vehicle, not looking at the vehicle from the front

Aug 17, 2011 | Jeep Wrangler Cars & Trucks

1 Answer

Check engine light comes on every 200 or so miles, code P0420. O2 sensor has been replaced. I read that there was a bad batch of catalytic converters in this model. Any other easy tests or fixes?


p0420 is set when the convertor is unable to store oxygen in the minerals used in the convertor. the lack of oxygen to mix with the exhaust gases causes the O2 sensor to set the code. if the O2 sensor has been replaced the only other thing to do is replace the convertor. you can check with the Subaru dealer and let them run your VIN to see if you had one of the defective convertors.

Aug 01, 2011 | 2001 Subaru Outback

1 Answer

I have a montero sport 2001,and the check engine light came on ,I took it to auto zone they toll me to change the oxigen sensor,which I did four of them ,and the light still on after resting for about four...


Well, for starters they should have never told you to change the oxygen sensors. The codes they pull are only a guide and it is up tp a tech to find the underlying problem. It sounds like you have a catalytic convertor issue.

Jul 26, 2011 | 2001 Mitsubishi Montero

2 Answers

2/1 oxygen sensor where is it located


The Oxygen Sensors (O2S) are attached to, and protrude into the vehicle exhaust system. Depending on the engine or emission package, the vehicle may use a total of either 2 or 4 sensors.
Federal Emission Packages : Two sensors are used: upstream (referred to as 1/1) and downstream (referred to as 1/2). With this emission package, the upstream sensor (1/1) is located just before the main catalytic convertor. The downstream sensor (1/2) is located just after the main catalytic convertor.
California Emission Packages: On this emissions package, 4 sensors are used: 2 upstream (referred to as 1/1 and 2/1) and 2 downstream (referred to as 1/2 and 2/2). With this emission package, the right upstream sensor (2/1) is located in the right exhaust downpipe just before the mini-catalytic convertor. The left upstream sensor (1/1) is located in the left exhaust downpipe just before the mini-catalytic convertor. The right downstream sensor (2/2) is located in the right exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor. The left downstream sensor (1/2) is located in the left exhaust downpipe just after the mini-catalytic convertor, and before the main catalytic convertor.

May 19, 2011 | Jeep Grand Cherokee Cars & Trucks

3 Answers

2002 toyota le 29,780 Miles check light on during driving code p1135


Code p1135 is a code for an Air/Fuel sensor (oxygen sensor). Bank 1 sensor 1. IT comes up when their is a problem with air/fuel mixture in the engine. It would be anything from a blocked air cleaner, faulty or fouled spark plugs to a blocked exhaust pipe/catalytic convertor. I would get these checked out, and if they are all fine the sensor its self or sensor circuit may have failed, requireing replacement. With your low miles, hopefully this maybe covered under warranty if it is the sensor.

Jan 21, 2011 | 2002 Toyota Camry

2 Answers

2001 Olds Alero oxygen sensor bank 1 P0135


p0135 indicates bank 1 sensor 1 which is before the cat.

May 22, 2010 | 2001 Oldsmobile Alero

1 Answer

When i started my 2006 rav 4 this morning these lights came on and are still on, brake light,4wd light, ABS, VSC LIGHT?


If you had your foot on the brake while starting brake light could come on. If a catalytic convertor does not pass at startup (possibly ox sensor or whole convertor) then the computor turns 4wd vsc and check engine light on. note the six cylinder has three catalytic convertors and the four cylinder has two. Very expensive if convertor(s)

Mar 07, 2010 | 2006 Toyota RAV4

1 Answer

Catalytic converters


If you are going to change the convertors I would just replace the first one closest to the engine. But when a computer code says "bank" they usually are refuring to the Oxygen sensor that is there , they are classified as bank 1 and bank 2. 1 being closest to the engine and 2 being farther down the exhaust. If its a computer code that told you bank 1 you might need to look at your oxygen sensor instead of your catalitic converter.

Dec 04, 2008 | 1996 Toyota Camry

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