Question about 2006 Nissan Xterra SE

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Po420 2006 xterra

Code comes on po 420

Posted by Anonymous on

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Posted on Jan 02, 2017

pal03246
  • 705 Answers

SOURCE: 2002 nissan altima 4 cyl

you need a new catalytic convertor. Its covered under factory warantee for 8 years or 80000 miles.

Posted on Oct 13, 2008

toneman2121
  • 775 Answers

SOURCE: my 2002 xterra has started running hot..code po

p0217 is coolant over temperature. the fan clutch may be slipping or the thermostat is bad. changing the thermostat would probably be the easiest and most inexpensive fix to determine the problem.

Posted on May 11, 2010

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1 Answer

Po 420 ?


Why would you change any items?

Have you not googled the code?

420 & 430 are exhaust converter issues

You change no parts,you check for codes & component
test system faults using the codes, until you find a problem

Sep 12, 2014 | 1998 Chevrolet Astro

1 Answer

Po 420 ?


code p0420 refers to cat converter system, bank 1 efficiency below threshold===causes --cat converter--wiring HO2S sensor 2

check that the cat converter is ok and replace the sensor. ( it is a HO2S sensor which will be different to a O2 sensor so get the right one )

Sep 12, 2014 | 1998 Chevrolet Astro

1 Answer

When smog check was done it read two codes po 411 and po 420


the first code is to do with the secondary air injection optical sensor not reading correctly and i suspect it's that causing the second code which is catalytic convertor reading out of range , so get the optical sensor sorted , may be the ECU or PCM wiring or the sensor itself

Jul 04, 2014 | Volkswagen Passat Cars & Trucks

1 Answer

P0420 p0430 p0750


Code 750 is a problem with one of the shift solenoids inside the transmission.
Code 420 is for the catalytic converter performance bank one and code 430 is the same thing for bank two. The codes mean the cat is not performing up to standards based on the data coming from the O2 sensors. Sometimes it a sensor problem, and sometimes its a cat problem or something in the fuel system.

Feb 11, 2014 | 2003 Lincoln LS V8

1 Answer

I have 2 codes PO 300 and PO 420


po300 is a random misfire code(could be egr passages blocked under upper pleinum;plug wires;plugs or coils.PO420 is catalatic converter below threshold(converter has to be replaced)

Jan 02, 2014 | 2001 Pontiac Grand Am SE

1 Answer

What could PO 302, PO 300, PO 105, PO106, PO 110,PO 115& PO 120 CODES Mean on a Toyota Camry 2000 model sedan car?


what engine, what size. that is first question.
misfire, map ,maf, iat, ect,tps and cat fail and low coolant temps.
very odd mix there. did you pull connections, key on???????

it means they all fail a test.
DIY? or just curious?

login to alldata.com
the question is , which is the most important.
all are cept 420, (last that, and bet goes way. later.)

reset the ECU, and see which come back.?
check all fuses.
then post codes that repeat, after fuse checks.

does the engine get fully hot running, 180F minimum?

Nov 27, 2013 | 2000 Toyota Camry

2 Answers

I just got the code po 420 how do i fix it


Most likely a worn out exhaust converter

PO 420 -- Catalyst System Efficiency Below Threshold (Bank 1)
that is the right or pass side

Rear or Monitor Sensors could be bad ,if converter is less
than ten years old

Aug 06, 2011 | 1996 Ford Explorer

1 Answer

My 2002 xterra has started running hot..code po 217 came on..after gas cap was put on wrong..cleared code put gas cap on right then fine for 2 weeks..when idleing heat gauge rises high..as soon as i rev...


p0217 is coolant over temperature. the fan clutch may be slipping or the thermostat is bad. changing the thermostat would probably be the easiest and most inexpensive fix to determine the problem.

May 09, 2010 | 2003 Nissan Xterra

2 Answers

My engine light came on


Trouble Code: P0455


EVAP Large Leak Detected

Possible Causes:


EVAP purge solenoid is damaged or it has failed

Fuel tank cap is damaged, missing or the wrong part number.(Check the fuel cap). replace if not the factory type.

NVLD switch is damaged or it has failed

Jul 14, 2009 | 2000 Nissan Xterra

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