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How can I bypass the catalytic converter sensor

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You mean the rear o2 sensor. What do you have a converter efficiency code keeping the check engine light on? You don't want to buy a converter but want the light off. If this is what you are asking they make O2 sensor simulators.

Posted on Oct 12, 2010

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1 Answer

How do I bypass a O 2 sensor without a catalytic converter in a ford mustang


the cat converter and o2 sensor are vital parts in keeping the engine tuned
with both missing the ECM will not tune the engine so there will be other factors that cannot do their prescribed jobs
plus the fact you will probably use more petrol
how do you bypass it
just leave it hang in the air

Nov 26, 2015 | Ford Cars & Trucks

1 Answer

Bypass the o2 sensor at catalytic converter


There's no way to bypass it. It reads directly to the PCM. I recommend unplugging it and put it in the glovebox until you get it fixed. It'll make the check engine light come on but it shouldn't affect drivability at all.

Feb 19, 2015 | Saturn Cars & Trucks

1 Answer

E-Check Light P0125 and pending p1153/p1155. Replaced ECT and codes reappear. Where is this Bank2 Sensor1 located on my 1998 toyota camry v-6 auto with air. P1155Code book described as AF sensor.


Air/Fuel Sensors are mounted upstream of the catalytic converter. They are located on the exhaust manifold side of the catalytic converter (pre-converter - Sensors 1). Oxygen Sensors are mounted downstream of the catalytic converter (post-converter - Sensors 2). The catalytic converter has two chambers (left and right). Bank1 is left, drivers side. Bank2 is right, passengers side. The Bank2 Sensor1 sensor (Air/Fuel Sensor) is the one located on the 'right and ahead' of the converter. The PowerTrain Control Module (PCM) is reporting that the heater or circuit ( wiring / plug-in) of the sensor is malfunctioning.

Jan 31, 2011 | Toyota Camry Cars & Trucks

1 Answer

Need to know where O2 sensor is located on a 2005 Dodge Grand Caravan.


There are two oxygen sensors: one is upstream of the catalytic converter and one downstream of the catalytic converter. The oxygen sensor, or O2 sensor is usually located near the catalytic converter.Oxygen sensor downstream of the catalytic converter in the exhaust system on the back of the engine. ------- Thanks.Helpmech

Nov 15, 2010 | 2005 Dodge Grand Caravan

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

1 Answer

Camshaft sensor and catalytic converter


Sometimes one problem causes many more. The camshaft sensor should be easy to access. Go to a good parts store and have a look at the diagram for part location. You may not need a Catalytic converter yet.

If the camshaft sensor went crazy you will not fire on all cylinders. Therefore the exhaust mixture will be rich and can damage the Catalytic converter. But when the repairs are made to the Camshaft sensor, give it some time to run correctly and see if the Catalytic converter clears up.

As with any repair, disconnect the NEG battery cable for 10 minutes to clear the old codes. Then use the car and let the car go for 300 miles or so to purge the Catalytic converter of excess fumes. Then if you need a newer Catalytic converter its almost like installing a muffler. You may need a special socket to change out O2 sensors from old to new.

Costs vary, Sensors are $20 to $50. Catalytics can be expensive, but Salvage yards have them used.

Jul 30, 2010 | 1997 Ford Taurus

1 Answer

I need to know how many 02 sensors are on a 1997 dodge intrepid.


  • Up-stream sensor (located before catalytic converter)
  • Left up-stream sensor (located before catalytic converter)
  • Left down-stream sensor (located after catalytic converter)
  • Right up-stream sensor (located before catalytic converter)
  • Right down-stream sensor (located after catalytic converter)
4 sensors total.

Jul 29, 2010 | 1997 Dodge Intrepid

1 Answer

Where is the oxygen sensor on 1997 ford taurus wagon 3.0


Single or double overhead cam type engine? In any case, these are the locations listed below.
  • Up-stream sensor (located before catalytic converter)
  • Left up-stream sensor (located before catalytic converter)
  • Left down-stream sensor (located after catalytic converter)
  • Right up-stream sensor (located before catalytic converter)
  • Right down-stream sensor (located after catalytic converter)

May 04, 2010 | 1997 Ford Taurus

3 Answers

Code po430 not sure what maybe converter


One of three (3) possibitlies:
1. Catalytic Converter is malfunctioning.
2. O2 Sensor is malfunctioning. This will be the O2 Sensor located on the Catalytic Converter. However you should check and/or replace both sensors if needed.
3. You have an Exhaust Leak.
In Order of checking:
A. Check and Repair any Exhaust Leak.
B. Replace the O2 Sensor on the Catalytic Converter 1st. Also Known as the Downstream O2 Sensor or HO2 Sensor.
C. Replace the O2 on the Exhaust Manifold prior to the Catalytic Converter. Also Known as the Upstream O2 Sensor.
D. Replace the Catalytic Converter.
Let me know if this helped, or if you have any additional information, problems or questions. Feel free to contact me at FixYa.com!

Feb 01, 2010 | 1998 Ford Explorer

1 Answer

PO420


Not just a faulty catalytic converter will trigger this code. Many other issues can trigger this code.

  • Leaded fuel was used where unleaded was called for
  • An oxygen sensor is not reading (functioning) properly
  • The engine coolant temperature sensor is not working properly
  • Damaged or leaking exhaust manifold / catalytic converter / exhaust pipe
  • Delayed spark timing
  • The oxygen sensors in front and behind the converter are reporting too similar of readings
Possible solutions:
  • Check for exhaust leaks at the manifold, pipes, catalytic converter.
  • Replace Coolant Temperature Sensor
  • Use a scope to diagnose the oxygen sensor operation (Tip: The oxygen sensor in front of the catalytic converter normally has a fluctuating waveform. The waveform of the sensor behind the converter should be more steady).
  • Inspect the downstream heated oxygen sensor (HO2)
  • Replace the catalytic converter
  • Have timing adjusted


Aug 25, 2009 | 2002 Toyota Camry

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