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Related Nissan Questions
I have a 2003 Nissan frontier 2x4 I'm getting a catalyst
I have a 2003 Nissan frontier 2x4 I'm getting a catalyst system efficient below threshold bank 2 code I was told that it need a ground wire on the O2 sensor … read more
Roy Sheidenberger
Roy Sheidenberger
11,007 satisfied customers
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
3,651 satisfied customers
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 Belding
Roy Belding
7,737 satisfied customers
Pathfinder: .. I have a 2001 Pathfinder LE 120K miles
Hello.. I have a 2001 Pathfinder LE 120K miles with OBD codes reading PO420(Bank 1) and PO430 (Bank 2) Catalyst System Efficiency Below Threshold..No power loss or idle stumble. What's your call here?… read more
Rick
Rick
Nissan Master Technician
Vocational, Technical or Trade Scho
503 satisfied customers
Xterra: 2006 Nissan Xterra, I had codes saying the catalyst
2006 Nissan Xterra, I had codes saying the catalyst efficiency was below threshold for both banks, this tells me that the O2 sensors are all working or it wouldn't know that it was below threshold, co… read more
Jay
Jay
Shop Forman / Lead Tech
Vocational, Technical or Trade Scho
26,926 satisfied customers
Getting code P1273 and P0430 on Nissan Xterra. How to fix?
So I've got a 2005 Nissan Xterra and I'm having a really hard time diagnosing an issue. It originally threw a p0430 code so I replaced my primary cat and upstream o2 sensor thinking it would resolve t… read more
Clifton B.
Clifton B.
nissan master auto tech
Associate Degree
5,462 satisfied customers
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
Senior Master Tech
Associate Degree
1,546 satisfied customers
failed emissions, emissions failure notice indicates: P0420
failed emissions, emissions failure notice indicates: P0420 catalyst system efficiency below threshold (Bank 1) (5) P0430 catalyst system efficiency below threshold (Bank 2) I need to know what needs … read more
Clifton B.
Clifton B.
nissan master auto tech
Associate Degree
5,462 satisfied customers
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
1,065 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
93 satisfied customers
o2 sensors..2 sensors replaced..engine lite came back on 1 1/2 weeks
will 2 bad o2 sensors ruin the catalytic converter. Had 2 sensors replaced and was advised to replace 3 catalytic converters after engine lite came back on 1 1/2 weeks later… read more
Chris(aka-Moose)
Chris(aka-Moose)
Nissan Technician
Vocational, Technical or Trade School
1,065 satisfied customers
2000 i30: (Catalyst system efficiency below threshold..o2 sensor
i have 2000 i30 infiniti. i get code 0430 (Catalyst system efficiency below threshold (Bank2). i also once got an O2 sensor slow response code. what do i need to replace?… read more
Mike V.
Mike V.
Nissan Technician
Subaru and Nissan factory training.
10,081 satisfied customers
45-50 mph or im doing over 2500 rpms the codes..control valve..leak
running several code but the main thing im noticing is that i cant go over 45-50 mph or im doing over 2500 rpms the codes are 430= catalyst system left bank 430= right bankp1448= evap canister vent co… read more
I. Silva
I. Silva
High School or GED
1,534 satisfied customers
99 Nissan Frontier: 4x4..replaced distributor, timing belt..radiator
99 Nissan Frontier V-6 4x4 Auto... Have a bad miss when you start the motor cold, once it's ran for awhile runs smooth. replaced distributor, timing belt, O2 sensors all four, changed TPS, thermostat,… read more
Ricardo Hohl
Ricardo Hohl
Auto Motive Instructor
Automotive tech
4,563 satisfied customers
p0420 Generic Catalyst system efficiency below threshold bank
p0420 Generic Catalyst system efficiency below threshold bank 1, I'm getting this code on my 2005 Nissan Xterra. I'm guessing it is an O sensor, but which one to I get from the Dealer?… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
23,527 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 Sheidenberger
Roy Sheidenberger
11,007 satisfied customers
2001 Nissan Sentra GXE: it threw the following codes..Po..Catalyst
I have a 2001 Nissan Sentra GXE 1.8. It is not running correctly and on a code machine it threw the following codes: Po 420 Bank 1 Catalyst eff. below threshold Po 430 Bank 2 catalyst eff. below thres… read more
Ironmike
Ironmike
ASE Master ,Ford Certified Master Tech
Vocational, Technical or Trade Scho
3,563 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
Clifton B.
Clifton B.
nissan master auto tech
Associate Degree
5,462 satisfied customers
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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)

Nissan Technician

1,065 satisfied customers

24 years of experience diagnosing & repairing

Tim Mohr

Tim Mohr

ASE MASTER TECH

650 satisfied customers

30 YRS EXPERIENCE, FOREIGN AND DOMESTIC, GAS AND DEISEL

Marty

Marty

ASE Certified Technician

203 satisfied customers

ASE & Bosch master tech. 30 years experience.

Mike V.

Mike V.

Nissan Technician

10,081 satisfied customers

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Ron

Ron

ASE Certified Technician

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34 years of automotive Repair

Anthony

Anthony

ASE Certified Technician

332 satisfied customers

ASE Master Automobile Technician with over 18 years exp. in this field.

Richard

Richard

ASE Certified Technician

93 satisfied customers

Nissan Tech ASE certified technician

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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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