Question about 2001 Nissan Frontier Crew Cab

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2001 frontier 3.3l v6 with 152,000 miles. had my SES light come on yesterday. i pulled code P0430. Is this an O2 sensor issue? if so which one, if I remmber correctly there are 4.

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P0430....Catalyst System Efficiency Below Threshold (Bank 2)

yes it could very well be a O2 sensor and the quickest way is to test with a multi meter ,their are 2 sensors on each bank ,now each sensor has four wires and two of the wires are the same colour ,so check these two wires for 12v supply coming to them ,then the other tow should show a varying current as engine ides and is revved a little ,

Posted on Mar 23, 2011

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Posted on Jan 02, 2017

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2005 Hyundai Tucson 2.7L 2WD


P0430 is a catalyst efficiency code. If there are no leaks in the exhaust or any vacuum leaks that could affect O2 sensor operation and the O2 sensors are working properly then it's possible that you need a catalytic converter. If you have access to a scanner capable of reading live data plug it in and take the vehicle on the high way at a steady 55-60 mph. The O2 sensor should read somewhere around 700 mv give or take but should not fluctuate to much. If it does you need a catalyst bank #2. Good luck!

Apr 10, 2014 | Cars & Trucks

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How do i fix p0430 code Nissan frontier 2005


A code P0430 may mean that one or more of the following has happened:

  • The catalytic converter is no longer functioning properly
  • An oxygen sensor is not reading (functioning) properly
  • There is an exhaust leak

It is most likely that an O2 sensor just prior to the catalytic converter has gone "lazy" and is not reading properly. To remove the O2 sensor, I would soak the sensor first with a rust penetrant and then you will need a 7/8" wrench or socket (depending on the sensor's location).

Oct 25, 2010 | 2005 Nissan Frontier

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My 2001 Pathfinder has an SES light with codes p1140, p0138, p0139... O2 sensors and a cam sensor... O2 sensor replaced, and the swapped the cam sensor with its partner on the other side... 150miles...


Possible mass airflow sensor. A cheaper way to get around paying for the super expensive 2001 Path part is to use the same year maxima sensor since they use the same motor :)

Jan 27, 2010 | 2002 Nissan Pathfinder

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Check engine light is on and now the truck is spitting and sput


i would take it back. they should cover it. sounds like mass air flow sensor. if it was barelly detailed it water might of seeped into the intake thus sucking small amount of water which then causes sputtering and a little lack of power.

Nov 06, 2009 | 2001 Nissan Frontier Crew Cab

1 Answer

Nissan fronteir codes are P0420, P0430 what has failed


po420 and430 is telling that the catalyst converters are no good both, most of the time bad o2 sensors maake computer think cat is no good, the way it tests is if o2 sensor reading before cat is about the same as the one after cat computer asumes cat is not bruning exhaust good , iwould replace o2 sensors reset check engine light and go from there, that might be the problem,if you were to replace cat o2s should be done at that time,so do o2s first,good luck.

Nov 05, 2009 | 2003 Nissan Frontier Crew Cab

1 Answer

2003 Saturn L300 indicator lights stay on: ABS, SES...etc


first problem, went to autozone. the guy that looked at your car was making pizzas last week. they pull codes and sell you every part you will buy. take the car to the saturn dealer and replace the bcm.

Mar 02, 2009 | 2006 Saturn L300

1 Answer

P0430 Cat efficiency below threshold


was the check engin light on at anytime for an o2 sensor code if so you need a new cat(catalytic converter) flash update i think was a way for a mechanic to get money from you unless it was warranty covered if your o2 was malfunctioning your car was mostlikely running rich which will plug up or burn out a cat

Dec 22, 2008 | 2002 Jeep Liberty

2 Answers

Service engine soon light grand vitara xl-7 on


You know I would doubt that this is caused by a speed wristed attendant, especially if you have removed and replaced the gas cap at the correct speed and the light stays on. ..................... ha ha.

Seems to be a recurring problem and having just spent a poop load of money with 2 dealers on that SES light issue I will tell you that the 2001 2.7 V6 engines have 4 O2 sensors and 3 catalytic converters. According to both dealers as those aforementioned parts approach the 100,000 mile marker they tend to send error codes. You get the errors cleared and 50 miles later there is the SES light again. The O2 sensors seemd to be very difficult to remove, both shops indicated you are better off to buy new catalytic converters, install new O2 sensors in them and then bolt in the whole mess as a unit. This of course assumes your bad readings are O2 sensor related. I would take it to a dealer as oppsed to autozone or advance as their generic little readers pale in comparison to the code readers at the dealership. price reflects that though.

Dec 19, 2008 | 2001 Suzuki Grand Vitara

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