Question about 1999 Toyota RAV4

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Need to replace the o2 sensor after the converter furthest from the engine what size bolts are used?

I'm missing the two nuts what size nuts do I need?

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8mm 1.25 thread pitch lock nut not a nylock

Posted on Jan 23, 2013

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It is the one on the right.

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SOURCE: O2 Sensor problem

this pic with be the fix ya
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co7196
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SOURCE: catalyst efficency below threshold P0420 2003 Corolla

should be a bolt on for service ability

Posted on May 27, 2009

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SOURCE: P0420 and P0430

The AF sensors are uupstream and the O2 down stream. The car' s computer tests them and it is saying your cats are bad. If you have a scan tool you could look at the data and see what the sensors are seeing. The Af sensors are the ones that control the fuel ratio in the car while the O2's just watch. AF's would be the one to change but there is no garuatee that the codes won't come back.

Posted on Sep 25, 2009

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1 Answer

Where is the 02 Oxygen Sensor before the cadalic converter on a 2006 Hyundai Santa Fe


Usually these are located on the exhaust manifold or just below the exhaust manifold and you should be able to see it in the engine bay. On V6 engines there will be one sensor on each of the 2 exhaust banks.
You will probably need to remove the engine cover to see the sensors on your exhaust.

If someone told you to replace these because you got a particular fault code I would be wary. A decent scan tool and basic diagnostics can show if the 02 sensor is working or not. Some faults often blamed on an 02 sensor are not due to faulty sensors.

Jan 09, 2016 | 2006 Hyundai Santa Fe

1 Answer

What size of bolts hold on the engine mounts


Take out one of the other mount bolts for a sample

You don't know how to measure bolt threads & convert
to metric if necessary?

That is a must if your going to work on any vehicle from
1980 on

Jan 22, 2013 | 1996 Dodge Caravan

1 Answer

Where is the oxegen sensor


O2 Sensors are in the exhaust system

In the pipe from the engine to the exhaust converter
or in the converter inlet

That is the upstream sensor, used to control the
fuel injection pulse width or fuel trim.

There are other downstream O2 sensors, called monitors,
that don't get replaced unless they fail

The ones closest to the engine get replaced at 100,000
miles, on all vehicles

A Sensor Code does not mean anything failed or
needs replacing

You need the codes & have to test to find a solution

Some vehicles have 4 sensors,if they have dual exhaust

May 18, 2012 | 1997 Oldsmobile Cutlass Supreme

2 Answers

Need to know where the 02 sensor is located on a 2003 chevrolet silverado


Your silverado has several 02 sensors, they are located as follows:

Bank 1 Sensor 1 - Driver's side, before catalytic converter
Bank 1 Sensor 2 - Driver's side, after catalytic converter
Bank 2 Sensor 1 - Passenger side, before catalytic converter
Bank 2 Sensor 2 - Passenger side, after catalytic converter

Hope this helps, thanks for useing FixYa!

Jun 29, 2011 | 2003 Chevrolet Silverado 1500

1 Answer

Which o2 sensor is the no. 2 on a 1999 Dodge Ram 1500 with a 5.2


it is the one behind the catalytic converter, furthest from the engine. It only monitors the condition of the cat and does not affect the engine computer and it's ability to monitor engine sensors.

Jun 02, 2011 | 1999 Dodge Ram

2 Answers

Check engine light is on and the code is p1133 is this the o2 sensor and how much will his cost me? please help


lmost O2 sensors are less than $75, that code indicates a 'lazy' sensor that is not switching fast enough to satisfy the engine computer-means your engine is probably near 100,000 miles or is in need of routine service (plugs, throttle body cleaning, etc.)-it will run smoother and get better gas mileage if you replace this sensor (bank one, side one, the sensor on the same bank as the #1 cylinder, in front of the catalytic converter).

May 23, 2011 | Chevrolet Tahoe Cars & Trucks

2 Answers

I have my engine light on, in my xg300 Hyundai 2001 if i replace the mass air flow sensor and my fuel air metering my light go off, Im a woman trying too fix my car my self pls help tks code...


check engine light will not go out or codes cleared till computer is cleared so if you have set off a code while trying to diagnose it will stay in memory with that in mind

PO171 & 174 are related to bank 2 lean o2 sensor reading high oxygen in exhaust at sensors
PO120 has to do with throttle position sensor input out of range
PO306 is a misfire in #6 cylinder

in my opinion any miss will cause o2 sensors to read lean because the cyl is in effect a air pump sensors only pick up o2 not the fuel does you engine run rough or hesitate/shaking on acceleration
i would check coil wire and plug for #6 also the injector not working will cause miss also they look ok do compression test on cyl will read 150psi if you find cause of miss you will be able to diagnose lean

with the tps sensor check to see if the connector was disconnected at any time you were testing

basically you need to isolate misfire and fix then have the computer cleared of codes drive car and if engine light comes on then we will go through test procedures for new codes

i hope this helps you to get a few ideals on how to proceed good luck ley me know

Jan 16, 2011 | 2001 Hyundai XG300

1 Answer

Where are the four O2 sensors on a 2003 Montero Sport? Is $300 reasonable to replace the two upstream sensors?


According to the service literature I read, the 2003 Montero Sport with the 3.0 or 3.5 L engine does not have O2 sensors listed even in the maintenance schedule. The 2.4 L engine has it on the exhaust manifold though.
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However, the following lists the par, though for before or after the catalytic converter:

http://www.partstrain.com/store/index.php?VN=4294967180+4294966587+4294964143+&Nr=AND(universal:0)&N=0&Ntt=Oxygen%20Sensor

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I think that $250 to $300 is reasonable if the Oxygen sensors are stuck in there with rust and the threads are preserved by the technician. Oxygen Sensor replacement can be tricky.
---
Good luck on this repair.

Exhaust Manifold

REMOVAL & INSTALLATION

2.4L Engine


  1. Remove or disconnect the following:

    • Negative battery cable

    CAUTION
    Wait at least 90 seconds after the negative
    battery cable is disconnected to prevent possible deployment of the air bag.


  2. Heat cowl from the exhaust manifold
  3. Aspirator valve assembly, if equipped
  4. Oil dipstick and guide
  5. Oxygen (O2S) sensor connector and ground cable, if equipped
  6. Exhaust pipe from the manifold
  7. Exhaust manifold and gasket from the engine
    To install:

  8. Install or connect the following:

    • Exhaust manifold. Torque the M8 mounting nuts to 22 ft. lbs. (29 Nm) and the
      M10 mounting bolts 36 ft. lbs. (49 Nm). starting from the middle and working
      outward.
    • O2S sensor connector and ground cable, if equipped
    • Exhaust pipe to the manifold. Torque the nuts to 35ft. (49 Nm).
    • Aspirator valve assembly, if removed
    • Heat cowl to the exhaust manifold. Torque the bolts to 117 inch lbs. (13
      Nm).
    • Negative battery cable

  9. Start the engine and check for exhaust leaks.


3.0L and 3.5L Engines


  1. Remove or disconnect the following:

    • Negative battery cable
    • Exhaust pipe from the exhaust manifolds
    • Oil dipstick, guide and O-ring
    • Heat shields
    • Exhaust manifolds

  2. Clean the gasket mounting surfaces. Inspect the manifolds for cracks,
    flatness and/or damage.
    To install:

  3. Install or connect the following:

    • New gasket and exhaust manifold. Torque the nuts to 33 ft. lbs. (44 Nm) on
      3.0L engines and 22 ft. lbs. (29 Nm) on 3.5L engines.
    • Heat shield, Torque the bolts to 10 ft. lbs. (14 Nm).
    • Exhaust pipe to the exhaust manifolds. Torque the nuts to 35ft. (49 Nm).
    • Oil dipstick, guide and new O-ring
    • Negative battery cable

  4. Start the engine and check for exhaust leaks.


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Oct 07, 2010 | 2003 Mitsubishi Montero Sport

2 Answers

I have an 1998 Chevy Blazer and need to change the catalytic converter, are the flange bolts welded and can i cut them


Catalytic Converter Removal & Installation 2.2L Engine To Remove:
Catalytic converter 2.2L engine gm-03-22-734.gif

  1. Raise and safely support the vehicle.
  2. Disconnect the heated oxygen sensor (HO2S) electrical connector.
  3. Remove the exhaust manifold pipe flange mounting nuts from the catalytic converter.
  4. Remove the catalytic converter flange mounting nuts from the muffler.
  5. Remove the catalytic converter from the muffler.
  6. Remove the catalytic converter from the rear hanger bracket insulator.
  7. Remove the catalytic converter.
  8. Remove the (HO2S) from the catalytic converter.
To Install:
  1. Install the (HO2S) to the catalytic converter.
  2. Install a new gasket and the catalytic converter to the muffler.
  3. Install catalytic converter to the catalytic converter hanger.
  4. Install the catalytic converter flange mounting nuts to the muffler flange.
    • Tighten to 26 ft lbs (35 Nm).
  5. Install the catalytic converter flange mounting nuts to the exhaust manifold pipe flange.
    • Tighten to 26 ft lbs (35 Nm).
  6. Connect the heated oxygen sensor (HO2S) electrical connector.
  7. Lower the vehicle.
------ Catalytic Converter Removal & Installation 4.3L Engine To Remove:
  1. Raise and safely support the vehicle.
  2. Raise and support the transmission.
  3. Remove the transmission support
  4. Disconnect the left and right pre-converter heated oxygen sensor (HO2S) electrical connector.
  5. Disconnect the post-converter (HO2S) connector. Muffler flange and gasket gm-03-43-731.gif

  6. Remove the catalytic converter flange mounting nuts from the muffler.
  7. Remove the catalytic converter from the muffler.
  8. Remove the exhaust manifold flange mounting nuts from the catalytic converter. Catalytic converter 4.3L engine gm-03-43-735.gif

  9. Remove the catalytic converter from the support bracket insulator.
  10. Remove the catalytic converter and gaskets.
  11. Remove the heated oxygen sensor.
To Install:
  1. Install the heated oxygen sensors as needed.
  2. Install a new gasket and the Install the catalytic converter to the support bracket insulator.
  3. Install the catalytic converter to the exhaust manifold flange. Install the mounting nuts.
    • Tighten to 39 ft lbs (53 Nm).
  4. Using a new flange gasket, install the catalytic converter to the muffler. Install the mounting nuts.
    • Tighten to 30 ft lbs (40 Nm).
  5. Connect the left and right pre-converter heated oxygen sensor (HO2S) electrical connectors.
  6. Connect the post-converter (HO2S) electrical connector.
  7. Install the transmission support.
  8. Lower the transmission.
  9. Lower the vehicle.
prev.gif next.gif ---
It looks like you can cut them and replace them with new bolts and nuts.prev.gif next.gif

Sep 05, 2010 | 1998 Chevrolet Blazer

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