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No spark to spark plugs. shorted out oxygen sensor to exhaust manifold

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SOURCE: service engine soon light on 2002 chevrolet tahoe stays on

That normally means that you have a issue with your gas cap try replacing your gas cap first then diconnect the negative terminal of the battery for about three minutes to clear the memory and start the truck again

Posted on Apr 11, 2009

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johnjohn2
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SOURCE: code PO420 catalyst system efficiency below threshold

you may have a bad converter, its not cleaning the exhaust, but on the other hand a bad rear o2 sensor can also cause this problem,there is a wat to test but you would need a scan tool or scope,replace the other sensor, if light returns then replace the converter, no money lost, if you were to replace the converter the o2 sensors should also be replaced. you have 165000 miles it would be crazy not to replace sensor and install new cat, so basically your just doing it in 2 steps and may get lucky and not need a cat. good luck.

Posted on Mar 05, 2010

Testimonial: "Your information is exactly what I needed to know.I suppose I just did not want to spend the money for a cat. converter. Thanks again for your help. "

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SOURCE: On a 2001 chrysler sebring coupe lxi 3.0 where is

my 2001 chysler sebring lxi 3.0 liter will not start and the starter is brand new

Posted on May 25, 2010

ZJLimited
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SOURCE: where is the rear "b2

Oxygen sensors are always numbered like this:
Bank 1 sensor 1
Bank 2 sensor 1
Bank 1 sensor 2
Bank 2 sensor 2

Some manufacturers use a kind of shorthand that reads different, but means the same thing:
Sensor 1/1 or O2s 1/1
Sensor 2/1 or O2s 2/1
Sensor 1/2 or O2s 1/2
Sensor 2/2 or O2s 2/2

Bank 1 is always the side of the engine where cylinder number 1 is located and, of coarse, Bank 2 is the opposite side.
On a 4 cylinder engine, there is only 1 bank and it is always referred to as Bank 1.

Sensor 1 is always the upstream sensor (The one located BEFORE the catalytic converter)
Sensor 2 is always the downstream sensor (the one that is located AFTER the catalytic converter.

Hope helps (remember to rate this).

Posted on Oct 06, 2010

  • 693 Answers

SOURCE: no power backfires,engine code PO134,replaced 02

p0134 is the upstream 02 sensor staying center and will cause a drivability problem. you don't need to replace both of them, the one at fault is the upstream one, mounted on the exhaust manifold.I do it under the vehicle while on a lift, if you can see it from behind the engine and access it, just remove it. spray it down with some penetrating liquid before attempting to remove it

Posted on Oct 20, 2011

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1 Answer

Oxygen sensor


oxygen sensors are located on the exhaust manifold on side of engine. it looks like a spark plug sticking out with a piece of wire ran to it.

Mar 27, 2013 | 1992 Toyota Pickup

1 Answer

How do you change oxygen sensors on a 2000 hyundai sonata


Locate the two oxygen sensors on either side of the Sonata's catalytic converter on the exhaust manifold. The Sonata's oxygen sensor is gold and shaped liked a spark plug.

  • 2 Remove the Sonata's wiring harness from the end of the two oxygen sensors using your fingers. Do not damage the end of Sonata's wiring harness.
  • 3 Remove the two oxygen sensors from the Sonata's manifold using the oxygen sensor wrench.
  • 4 Apply the anti-seize compound to the threads of the Sonata's two new oxygen sensors.
  • 5 Install the two new oxygen sensors to the Sonata's manifold using the oxygen sensor wrench. Re-attach the wiring harness to the two new oxygen sensors using your fingers.
  • Oct 31, 2011 | 2000 Hyundai Sonata

    2 Answers

    Hi I have a 2004 Dodge Caravan with a 3.3 liter engine and it shows a fault code # P0137. Could you please tell me what this code means. Hope you can help!!!!!


    One of the wires to an oxygen sensor on your exhaust manifold has a break in the insulation and it is shorting against part of the metal frame of the vehicle. The oxygen sensors look a bit like spark plugs set into the side of the exhaust manifold. I think I am right in saying that on the V6 dodges there are 4 such sensors One on each exhaust manifold before the catalytic converters and one after each catalytic converter. Check them all but I think the code is for the second sensor (after the catalyst) on bank one (the bank of cylinders closest to the radiator). The cable attached to each oxygen sensor has four wires within it, two to power the sensor heater (the need to be warm to work) and two for the oxygen sensor element.

    Mar 22, 2011 | 2004 Dodge Caravan

    1 Answer

    Getting P0420 code & P0303 code...why?


    A code P0420 may mean that one or more of the following has happened:
    • 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
    • Retarded spark timing
    • The oxygen sensors in front and behind the converter are reporting too similar of readings
    Possible SolutionsSome suggested steps for troubleshooting a P0420 error code include:
    • Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
    • 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 if necessary
    • Replace the catalytic converter

    Code p0303 means one cyliner is misfireing. Check spark plugs and wiring cables. If one cylinder isn't working good that could be the possible couse for the first code P0420 and all other engine problems.

    Feb 25, 2011 | 2005 Isuzu Ascender

    1 Answer

    2001 silverado po300 code and po135 code changed 2 o2 sensors still coming up have not changed driver side o2s yet


    Well the P0300 code has nothing to do with your O2 sensors just a heads up.

    P0300: Random/Multiple Cylinder Misfire Detected

    When a misfire occurs, engine speed will fluctuate. If the engine speed fluctuates enough to cause the crankshaft position (CKP) sensor (POS) signal to vary, Powertrain Control Module (PCM) or Electronic Control Module (ECM) can determine that a misfire is occurring.

    Causes:
    - Improper spark plug
    - Insufficient compression
    - Incorrect fuel pressure
    - The injector circuit is open or shorted
    - Fuel injectors may be faulty
    - Intake air leak
    - The ignition signal circuit is open or shorted

    Solutions:
    - Perform Injector Service
    - Replace Spark Plugs
    - Replace Injectors
    - Replace Ignition Coils

    P0135: O2 Sensor Heated Circuit Malfunction Bank 1 Sensor 1

    The front heated oxygen sensor (or sensor 1) is placed into the exhaust manifold. It detects the amount of oxygen in the exhaust gas compared to the outside air. The heated oxygen sensor 1 has a closed-end tube made of ceramic zirconia. The zirconia generates voltage from approximately 1V in richer conditions to 0V in leaner conditions. The heated oxygen sensor 1 signal is sent to the ECM. The ECM adjusts the injection pulse duration to achieve the ideal air-fuel ratio. The ideal air-fuel ratio occurs near the radical change from 1V to 0V.

    Causes:
    - Harness or connectors (The sensor circuit is open or shorted)
    - Front Heated oxygen sensor (Bank 1) may be faulty

    Solutions:
    Replacing the O2 Sensor 1 usually takes care of the problem

    Jan 27, 2011 | 2001 Chevrolet Silverado 1500

    1 Answer

    Im getting the 0420 code. I was getting 0135 code on and off at first. then I replaced the driver side o2 sensor and spark plugs.


    A code P0135 may mean that one or more of the following has happened:
    • O2 Heater element resistance is high
    • Internal short or open in the heater element
    • O2 heater circuit wiring high resistance
    • open or short to ground in the wiring harness
    Possible Solutions
    • Repair short or open or high resistance in wiring harness or harness connectors
    • Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)

    A code P0420 may mean that one or more of the following has happened:
    • 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
    • Retarded spark timing
    • The oxygen sensors in front and behind the converter are reporting too similar of readings
    Possible Solutions Some suggested steps for troubleshooting a P0420 error code include:
    • Check for exhaust leaks at the manifold, pipes, catalytic converter. Repair as required.
    • 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 if necessary
    • Replace the catalytic converter
    One thing to note is that many vehicle manufacturers offer a longer warranty on emissions-related parts. So if you have a newer car but it's out of it's bumper-to-bumper warranty, there still may be warranty on this type of problem. Many manufacturers give a five year, unlimited mileage warranty on these items. It's worth checking into.

    Dec 15, 2010 | 2000 Chevrolet Silverado

    1 Answer

    Oxygen sensor replacement


    The oxygen sensor is located approximately 10 inches down the exhaust manifold. It looks like a spark plug with wires coming out of it. Most of the time there are two or more depending on which motor you have. Hope this helps!

    Jul 30, 2010 | 1994 Oldsmobile Cutlass Supreme

    2 Answers

    I need to know where the oxygen sensor is for a 99


    should be in the bottom end of the exhaust manifold or the actual exhaust pipe befoe the cat ,

    Aug 05, 2009 | 1995 Mitsubishi Eclipse

    2 Answers

    I need location of oxygen sensor on a 2001 town & country


    ALL of your oxygen sensors are located i your exhaust system Your exhaust system starts at the exhaust manifold on the side of the engine and ends at the tail pipe by you back bumper. Your vehicle oxygen sensors are 4 of them there are two on each side of your exhaust the are actually screw into the exhaust they are like the nose of you engine to read how rich/lean the car is running. The are pretty simple to replace, they look kinda like spark plugs with wires attached to them the wires are usually colored white black and grey with plug connections on the end. To replace get a oxygen sensor socket and a ratchet and unscrew this socket can be bought at almost any auto parts place like auto-zone etc. Good luck and thanks for using FIX YA

    Mar 22, 2009 | 2001 Chrysler Town & Country

    1 Answer

    Oxygen sensor


    They are all located on you exhaust system. Start from you exhaust manifold and follow the pipes down to the tail pipes . You will see the sensors (4) they are screwed into exhaust pipes and they have wire connections on them (Kinda Looks Like a spark Plug) they wires are unusually colored in white black and grey. Good Luck contact if you need more information

    Dec 28, 2008 | 2005 Chevrolet Equinox

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