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What does code PO420 mean and what you need to do service engine soon light on a 2003 Nissan Xterra?
Wiki User
∙ 15y ago
Trouble code P0420 means:Catalyst system efficiency below threshold (bank 1)
Wiki User
∙ 15y ago
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What mean Po420 Dode caravan?
Do didn't say which engine you have. The trouble code PO420 is telling you there is a catalystic converter not doing it's job. We need to know which engine and what year you have in order to determine which cat is at fault.
How do you fix po420 on impala 3.4?
Po420 2001chevy lmpala
2004 Chevy Colorado check engine codes PO420?
P0420=Catalyst System efficiency below threshold
02 prizm with 2 codes po420 and po135 i already changed both 02 sensors and the cat engine light is still on and its getting expensive i need help figuring this out?
the po420 could also be a misfire or vacuum leak
What code is PO420?
Code PO420 is catalytic converter efficiency low bank 1
What is a PO420 in a 2002 Mercury Cougar?
What is a PO420 in a 2002 mercury cougar: Now if your car is 2.0L DOHC. OBD ll PO420 : Catalyst Efficiency Below Threshold (BANK 1). Hope this helps...
What does enginecodes po420 po430mean dealer says conv needs replaced true.?
I also have a "service engine soon" code P0430 showing in my 2001 Tracker 4 wheel drive. I need to know what this code means so I don't have to pay for the diagnostics test again to fix it. My car is overheating when it idols and I'm unsure if the engine fan is going out or if this is due to the P0430 code.
What is the meaning of code PO420 on a 1998 Toyota Tacoma?
look it up on yahoo as engine codes cylinder 2 misfire it happened on mine the other day. 98 2.7 litre 4x4
What is code PO420 on a 2000 Chevy Prizm?
catalyst system fault
Replace converter on 2002 grandam but keep getting po420 code?
You assumed that Code PO420 Catalysis System Efficiency Below Threshold (Bank 1) meant the converter was bad? Not necessarily so. It can be an exhaust leak, defective O2 sensor on bank 1, engine coolant sensor is defective, leaking fuel injector, cylinder misfire, or problem with wiring on O2 sensor.
Why does a 2000 Toyota Camry erratic code po420 what can you do about it?
It's Catalyst system efficiency below threshold
What does engine code PO420 mean and how do you repair it?
PO420 code indicates Cat converter problem. Could be restricted by carbon or melted or have a fractured brick. Run it by your favorite undercar/exhaust shop and have it checked, many shops will diagnose and estimate for free. If there is a bad cat that's not been impacted and fractured, you must have whatever caused the problem repaired before replacing the cat or you will damage the new one and be doing it again... warranty won't cover it and they're not cheap. Good Luck
