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I have the following code on my Nissan Pathfinder 2003.
I have the following code on my Nissan Pathfinder 2003. P0430: Catalyst System Efficiency Below Threshold (Bank 2) -- I am not a good mechanic, but I understand things. I would like to know before I c… read more
Anthony P.
Anthony P.
ASE Certified, Ford Master, Honda Master
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Have a code P0430 bwing thrown Catalyst System efficiency
Have a code P0430 bwing thrown Catalyst System efficiency below threshold (bank 2). What does that mean.… read more
roy
roy
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Murano: I just bought a used 2005 nissan murano and the service
I just bought a used 2005 nissan murano and the service engine soon light is on. The current code on it is P0420 Catalyst System Efficiency Below Threshold (Bank 1). I have seen online that it could b… read more
roy
roy
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Nissan Pathfinder: 2005 Nissan Path SE, 128K. 4x4. Throwing
2005 Nissan Path SE, 128K. 4x4. Throwing code P0430 Catalyst effeciency below threshold bank 2. I believe this vehicle equipped with (4) O2 sensors. If the above code is for a bad 02 sensor, could you… read more
GearheadBrown
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My 2003 Frontier 6 cylende automatic truck has this code reading
My 2003 Frontier 6 cylende automatic truck has this code reading on it with the service engine light on catalyst system efficiency below threshold bank 2 p0430 How do I find out what this means and fi… read more
6Bucs
6Bucs
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what causes the transmission to slip out of gear into neutral
what causes the transmission to slip out of gear into neutral when accelerating from zero to 35 mph in a 2001 maxima with a total of 190,000 miles… read more
HondaPlatinum
HondaPlatinum
High School or GED
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2001 Frontier: emmissions due to poor catalyst efficiency
My 2001 Frontier is failing emmissions due to poor catalyst efficiency. Is it the lead cat that fails first or the second?… read more
Chris(aka-Moose)
Chris(aka-Moose)
Nissan Technician
Vocational, Technical or Trade School
747 satisfied customers
im getting trouble codes ofp0420 Catalyst System Efficiency
I'm getting trouble codes of P0420 Catalyst System Efficiency Below Threshold (Bank 1) P0430 Catalyst System Efficiency Below Threshold (Bank 1) what does this mean?… read more
Richard
Richard
ASE Certified Technician
Vocational, Technical or Trade Scho
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2005 Altima: it only cranks, it..gas pedal..car runs fine
On my 2005 Altima I turn my ignition on but it only cranks, it does not start, until I hit the gas pedal. My vehicle hasn't had any other problems and after I am able to start it, the car runs fine. W… read more
Ryan
Ryan
Master Infiniti Tech
Associate Degree
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dashboard lights is on, I stop on auto parts..diagnostic..catalyst
i have 2005 armada with 96.400 miles and the dashboard lights is on, I stop on auto parts and they told the diagnostic is : P0430 catalyst system effiency below threshold bank 2. do you mean with part… read more
NicksSticks
NicksSticks
Vocational, Technical or Trade Scho
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dashboard lights is on, I stop on auto parts..diagnostic..catalyst
i have 2005 armada with 96.400 miles and the dashboard lights is on, I stop on auto parts and they told the diagnostic is : P0430 catalyst system effiency below threshold bank 2. do you mean with part… read more
Jan Andersson
Jan Andersson
Master Tech
Bachelor's Degree
3 satisfied customers
2004 Nissan xterra: service engine soon..P0430 catalyst efficiency
2004 Nissan xterra and service engine soon ligth came on. The code is P0430 catalyst efficiency below threshold. I am inquiring more details and how much would this cost to fix?… read more
Mike O.
Mike O.
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Associate Degree
278 satisfied customers
Nissan frontier: 80,000 miles..auto zone..below threshold..vacuum leak
i have a nissan frontier 2001 with 80,000 miles and it just passed smog check and the engine service soon is coming on. i took to auto zone and they checked and they told me the problem is the catalys… read more
Roy
Roy
Vocational, Technical or Trade Scho
5,421 satisfied customers
2003 Altima 4 cyl automatic; alarm code PO420 three way catalyst
2003 Altima 4 cyl automatic; alarm code PO420 three way catalyst function; my dianostic shows fuel sys1-CL; fuel sys 2-CL-fault; CALC Load(%) 38.04; ECT(F) 190; STFT B1(%) -3.13; catalyst system effic… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
i have a nissan frontier 3.3l v6 it is misfiring, i checked
i have a nissan frontier 3.3l v6 it is misfiring, i checked with a code checker and i got two codes random/multiple misfiring and catalyst efficiency below threshold… read more
indy-tech
indy-tech
Shop owner, technician
Vocational, Technical or Trade Scho
11 satisfied customers
2001 Nissan FRONTIER: 4cyl, 5 speed..CODE P0420..CATALYST SYSTEM
2001 Nissan FRONTIER, 4cyl, 5 speed, 260k miles....all commute. problem- CODE P0420 - CATALYST SYSTEM EFFICIENCY BELOW THRESHOLD BANK 1. my question: how do i know which sensor to replace? My guess it… read more
Roy
Roy
Vocational, Technical or Trade Scho
5,421 satisfied customers
2001 sentra: car runs great, idles smooth, no misfire..o2 sensors
I have a 2001 Sentra XE. I pulled two codes from the OBD II scanner: P0420 and P0430, catalyst efficiency below threshold, banks 1 & 2. The car runs great, idles smooth, no misfire...even under a load… read more
3pac2222
3pac2222
nissan master auto tech
Associate Degree
2 satisfied customers
2005 Altima 2.5L 82K miles. Service Engine Soon light is on.
2005 Altima 2.5L 82K miles. Service Engine Soon light is on. Code: P0420 Text: Catalyst System Efficiency Below Threshold. What is this and how can I repair this? Thanks, Rick… read more
Mike V.
Mike V.
Nissan Technician
Subaru and Nissan factory training.
9,482 satisfied customers
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used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

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9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

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SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

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Meet the Experts:

Chris(aka-Moose)

Chris(aka-Moose)

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Tim Mohr

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Marty

Marty

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Mike V.

Mike V.

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Ron

Ron

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Anthony

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Richard

Richard

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Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

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