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P0420 fault code - 2006 Land Rover LR3

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Codes po303, po171, po137. po420


2000 Toyota Corolla, P0171 & P0420 codes - YouTube

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https://www.youtube.com/watch?v=ahJnJ19-vwY
Jun 13, 2011 - Uploaded by StandardBrandParts
Standard Motor Products presents: Technician's Toolbox "2000Toyota Corolla, P0171 & P0420 codes"

Smoke testing for codes P0171 P0174 - YouTube

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Jan 18, 2011 - Uploaded by realfixesrealfast
These two codes mean a V style engine is running lean on both banks. So you have to be thinking - what can ...

How to repair fault code P0171 and reset warning light ...

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https://www.youtube.com/watch?v=Y8FBGrCT3rM
Nov 27, 2014 - Uploaded by Peter Finn
How to repair and fix fault or error code P0171 and reset warning light Toyota Corolla VVT-i engine. ... Also how to find fault codeusing OBD scanner. ... Trouble shooting a misfire, Code P0300, P0301, P0302, P0303, P0304, P0305, P0306, ... 2000 Toyota Corolla, P0171 & P0420 codes - Duration: 5:43. by ...


Dec 02, 2015 | 2005 Toyota Corolla

1 Answer

Volkswagen touareg 2005, V6, 3.2L error code P0420, P0430 and P0068


Hi. Please concentrate on fixing p0068. this is to do with airflow and fuel/ mixture. maybe air mass meter. these can cause faults p0420 and 0430 to come on. after p0068 is repaired clear all faults and take the car on a long drive to clean out the cats, reassess if the cats are actually faulty at a later date.

Mar 04, 2014 | Volkswagen Cars & Trucks

2 Answers

Engine light stays on, code is p0420 low thresh bank 1.... where is bank 1 located


I'm not sure you understand the difinition of OBD2 fault code P0420, it means that Catalytic converter in the exhaust that is connected to the engine cylinder bank that contains number one engine cylinder has fallen below the a allowed threshold of cleaning pollunts from the engines exhaust stream. I would be more specific but you have not given model or year of the Mercury you have.
Here is the full difinition of OBD2 fault code P0420 from the factory service information system.


P0420 - Catalyst System Efficiency Below Threshold (Bank 1)


Possible causes - Three way catalyst converter worn out
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Engine Control Module

Jun 07, 2011 | Mercury Cougar Cars & Trucks

1 Answer

Have code on my 03 Jaguar p0420 can someone plz tell how to correct and it also says p1111


P0420 = Catalyst system efficiency below threshold (Bank 1) - possible sensor fault ?
P1111 = Intake air temperature ( IAT ) Sensor circuit intermittent high voltage - again a possible sensor or cable fault.
Take the car to a reputable repair shop and they will be able to confirm the faults by testing.
Hope this helps - good luck.

Apr 20, 2011 | 2003 Jaguar S-Type

1 Answer

Getting OBD codes p0420 and p0430, how to fix these issue with my 2001 Audi A6


2001 Audi A6
EOBD code: P0420
Fault location: Catalytic converter system, bank 1 - efficiency below threshold
Probable cause: Catalytic converter, wiring, heated oxygen sensor 2 (downstream)

EOBD code: P0430
Fault location: Catalytic converter system, bank 2 - efficiency below threshold
Probable cause: Catalytic converter, wiring, heated oxygen sensor 2 (downstream)

Sep 14, 2010 | 2001 Audi A6

1 Answer

Fault codes p0420&p1406


catylist efficiency below threshold ( p0420 ). heres a probable fix. go to http://repairpal.com/obd-code-p0420----- this will tell what may be wrong as not to replace parts that are not bad.

Feb 17, 2010 | 1996 Chevrolet C2500

1 Answer

I have two fault codes, P0302, P0420


P0302 is cylinder 2 not contributing. I could be a bad spark plug or injecor.

P0420 is catalytic converter issue. I could be because of the cylinder 2 failure.

Jan 22, 2010 | 1997 Nissan Pathfinder

1 Answer

I HAVE A 2003 CHRYSLER 300M SPECIAL WITH 3.5 ENGINE READIN CODE P0420 REPLACED P.C.V. AND REAR 02 SENSORS STILL COME UP WITH P0420 ASLO REPLACED GAS CAP


PLEASE CLICK HERE to see a page dedicated to your Fault Code.

It is Cat. Convertor related.

this is a fault code for a bad drivers side catilist.this code will also set if there is a exhust leak as well on that side.The catilist is covered under warranty for 8 years or 80k

Thanks for using FixYa - a FixYa rating is appreciated for taking the time to answer your FREE question.

Apr 08, 2009 | 2003 Chrysler 300M

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