0
code P0420 is set when the computer detects a fault in the three way catalytic converter circuit.
there is a oxy sensor before and after that cat, and if the sensors do not read what they are supposed to be, it sets a code 420, which could be a failed sensor, or a failed catalytic converter, or a failure in wiring.
Depending on high mileage or not, it is most often the cat worn out or, a sensor worn out.
Wiki User
∙ 11y ago
Add your answer:
Earn +20 pts
What ndoes code p1273 mean on 2004 Nissan altima 2.5s?
what does codep1273 mean on a nissan altima
What does code u1001 Nissan Altima?
what dose the code u1001 mean for a 2002 Nissan maxima
What code is PO420?
Code PO420 is catalytic converter efficiency low bank 1
What does Error code po329 for a 1995 Nissan altima mean?
There is no error code PO329 for a Nissan Altima. The closest codes for this would be P0335 which is the CKP Sensor or P0340 which is the CMP Sensor, Detectable Or Undetectable Circuit.
Where is the iat sensor in a Nissan altima?
In a Nissan Altima.
Evap canister control valve code 1998 Nissan Altima?
P1148
What is code PO731 on a 2002 Nissan Altima?
Trouble code P0731 means:Gear 1 incorrect ratio
Nissan Altima po335 code?
Trouble code P0335 means:Crankshaft position sensor A circuit malfunction
When was Nissan Altima created?
Nissan Altima was created in 1993.
Where is the speed sensor located on the 2005 Nissan altima?
I HAVE A PO725 CODE IN MY 2005 ALTIMA, WHERE IS THE ENGINE SPEED SENSOR AT,THANKS 2.5
Could you inform me about Nissan Altima parts?
You may find reliable information about Nissan Altima parts at either of the following web sites...www.edmunds.com Used Cars Nissan Altima 2011 Altima or www.insideline.com/nissan/altima/.../2013-nissan-altima-35-sl-full-tes...
What does code PO420 mean and what you need to do service engine soon light on a 2003 Nissan Xterra?
Trouble code P0420 means:Catalyst system efficiency below threshold (bank 1)
