Question about 2005 Nissan Altima

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I have replaced my Catalytic converter with a direct fit replacement, also replaced my engine speed sensor and crank shaft sensor and i still have my service engine soon light on. The latest fault says something about a sylinoid malfunction? The car will not start or is very hard to start randomly...not every time it is cranked, the whole car sometimes jerks going down the road and it feels really sluggish, i have took care of my car trans been serviced 2 times and oil changed religiously....Im so over NIssan

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If a converter failed in less than 12 or more years--you have a problem, that caused it to fail, correct that first,then the new converter.

If you replaced Sensors yourself, based solely on codes,and did no testing,they may have been okey, and not the problem

You know, you need to get the codes, any time a check light is on,which you have. That only points to an area of malfunction within a system,not the problem or what to replace.

I hope a dealer hasn't taken you down this road,I'm guessing they have.
When you leave a vehicle at a dealer, and only have contact with a service adviser out front,no road test,no tech to talk to,how would the person assigned your car, know why it was there? You see the results. There are thousands of people on this site alone,two thirds are here, because a dealer has fixed nothing,absolutely nothing.

Without the vehicle.no one can diagnose all your issues.
Find a shop close to home, that is up to speed on todays vehicles

No road test with you in car--leave
No Data subscription such as All Data or Motor,Indentfix in shop ---leave. Without that they know nothing about your vehicle.
If they say give me your keys,I will check it out---leave
You need at least 15 min or more discussion about your cars history and a completed R.O. repair order,stating what your authorizing

Posted on Sep 30, 2010

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How cam shaft sensors on a 1994 Toyota Camry V6


Pull an O2 sensor before the catalytic convert. If it starts, replace the cat.

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06 lincoln navigator check engine code p0420 what that mean


There is a problem with the catalytic converter. P0420 sets when the downstream o2 sensor is either reading higher than expected or reading simular to the upstream O2 sensor. Either way it is usually the catalytic converter that is the source of the problem and rarely the downstream O2 sensor.

The Catalytic converter is located in the exhaust system under the car. Catalytic converters from either the dealer or a quality direct fit part from a reputable manufacturer are recommended. Cheap cats lead to lots of problems!

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Check Engine light code P0432


P0432 - Main Catalyst Efficiency Below Threshold Bank 2
The ECM or PCM monitors the front an rear O2 sensors. The ECM or PCM detects Warm up Catalytic Converter when the sensors are out of specifications.

DTC is set when the ECM or PCM detects rear HO2S value difference becomes closer to value of front HO2S. The ECM or PCM monitors when vehicle speed is 25-60 MPH, load is 22-45 percent and engine speed is 1000-3000 RPM.

Symptoms
- Engine Light ON (or Service Engine Soon Warning Light)

Possible causes
- Warm Up Three Way Catalytic converter deterioration or malfunction. - Exhaust system leaks. - Loose front or rear HO2Ss. - Front HO2S malfunction. - O2 sensors harness or connectors

Possible solution
- Replaced Catalytic Converter - Replaced rear O2 sensor - Repair wire harness or connectors

Check it ans tell us news.

Jan 16, 2011 | 1999 Dodge Intrepid

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The only fault code on 2001 kia sephia is P0422, catylist threshold low.... car ran for 2 weeks fine after new fuel pump, and then just died like first time.... 126 thousnd miles and plenty of fuel, fuel...


P0422 - Catalyst below threshold.

Catalytic converter is clogged or out of medium.

Replace it.


ACTUAL DIAGNOSTIC:

Fault Code Definition
Code P0422 indicates that the Bank 1 Main Catalytic Converter's emissions efficiency has fallen below the minimum allowable limit. This threshold is tracked by a Catalyst Monitoring Oxygen Sensor located on or near the outlet of the Catalytic Converter.

Symptoms

* Check Engine Light will illuminate
* In many cases, no abnormal symptoms may be noticed

Common Problems That Trigger the P0422 Code

* Defective Catalytic Converter
* Engine misfires have damaged the Catalytic Converter
* Internal engine damage resulting in high oil consumption and/or a leaking Head gasket has damaged the Catalytic Converter

Common Misdiagnoses

* Oxygen Sensors are replaced when the real problem is a damaged Catalyst
* Catalyst is replaced when the real problem is internal engine damage, which is producing elevated emissions levels
* Catalyst is replaced when a misfiring engine is the real problem



Thanks for using FixYa - a 4 THUMBS rating is appreciated for answering your FREE question.$%@#

Jan 24, 2010 | 2001 Kia Sephia

1 Answer

Just had the timing belt replace. Had alternator replace...twice! Feels like not all cylinders are working. Now, it won't start. Husband thinks it's the catalytic converter and the klutch wire (???).


Have you replaced the Crank shaft position sensor . This on my 96 jeep is what tells every thing where the top dead center and engine speed is at. there like 70 bucks.

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Need to replace bank 2 sensor 2 on 2003 toyota highlander , where is it located


Bank 2, sensor 2 is a heated O2 sensor located below (after) the catalytic converter on the passenger-side. When this sensor gets clogged and/or goes bad from rust and heat fatigue, the voltage drops low enough to cause the electronic control module to register error code P0161, which then causes the check engine light to come on.

To replace Bank 2, sensor 2, remove the debri shield from just behind the front bumper, underneath the vehicle. There will be 10 bolts holding it on (10mm, I believe). After removing it, look toward the center of the newly exposed area and you will see 2 finger-like objects projecting out from the engine with wires coming out of each. The one on the left (passenger-side) is bank 2, sensor 2. The one on the right (driver-side) is bank 1, sensor 2.

I got my direct-fit sensor online for $55 from Remart Auto Parts. I know it is tempting to get the universal-fit type and save the cash. But after doing that once, I wouldn't care to do it again.

I found a YouTube video showing pictures of where the two lower (after catalytic converter) sensors are located. While the video only points out the driver-side sensor (bank 1, sensor 2), it's easy to spot the other one being only inches away.

http://www.youtube.com/watch?v=TgQtZci2oOg

If anyone has found this helpful at all, please vote for me.

Dec 01, 2009 | 2003 Toyota Highlander

1 Answer

I have a 2005 pontiac Grand Prix, the engine light came on, I took it to Auto Zone and they said the code read Catalytic converter. Could it be somethning else?


Possibly could be an exhaust leak, or an O2 sensor going bad. I usually replace the sensors first as they should be replaced with the converter. If the light comes back on, it will need a direct fit converter installed. If you have less than 80K, it is still under warranty.

Jun 10, 2009 | 2001 Oldsmobile Intrigue

1 Answer

How to replace/remove both catalytic converters


Below are the steps needed to remove the catalytic converters. You may be able to first remove the band clamp from between the converter and the exhaust manifold, then loosen the rest of the system and to get enough clearance to slide the converter towards the front of the vehicle but you will need to first remove the clamp that holds the converter to the rest of the exhaust. Hope this helps
_______________________
Both Catalytic Convertors

First you need to raise the vehicle.

Next, you need to pry the insulators from the support brackets and support the muffler and tailpipe with jackstands.

Then, loosen the the catalytic converter down pipe-to-front resonator clamps and separate the front resonator from the converter down-pipes. Carefully lay the free laying exhaust on the ground.

______________________
Right Catalytic Converter

Then, remove the down-pipe-to-transaxle bracket nut, loosen the clamp and separate the extension pipe from the converter.

Next lower the vehicle and remove the air filter and intake ducts. Disconnect the wiring harness for the O2 sensor and the remove the sensor.

Finally loosen the band clamp at the exhaust manifold and remove the converter from the engine compartment. You may need to replace these clamps after removal because you need to pry it apart and they will leak when you reinstall.

_____________________
Left Catalytic Converter

Now disconnect the wiring harness for the O2 sensor and the remove the sensor.

Next remove the down-pipe-to-transaxle bracket nut

Finally loosen the band clamp at the exhaust manifold and remove the converter from the engine compartment.

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My Son's 01 Sonata displayed the exact same systems and it was his catalytic converter. The metallic sounds were the converter guts disintegrating.

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check your MAF sensor, if it's dirty clean it then reset your check engine light again. this should work.

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