Question about 2002 Volkswagen Jetta TDI

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Yahoo.com.mxDiagnostic trouble codes reported: P0740 and P0420, The Catalyst was replaced one year ago. Thanks

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PO740 -- trans torque converter clutch

PO420 - converter as you said.

Do you have 2 or a bad O2 Monitor Sensor

If a converter goes bad in less than 12 years
or more ,you have to fix the reason it failed,
not just install a new one

Posted on May 24, 2011

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Posted on Jan 02, 2017

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What means catalyst Efficiency below normal


      Got it scanned and it's P0420: Catalyst efficiency below thresholdbank 1. They said it could be a bad catalytic converter or oxygen sensor. I borrowed a scanner and tried to measure the oxygen sensor readings over time.Sep 8, 2011

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    P0420 Error Code: Catalyst System Efficiency Below ...

    www.obd-codes.com/p0420
    P0420 OBD-II Trouble Code. Technical Description. Catalyst System Efficiency Below Threshold (Bank 1). What does that mean? This diagnostic trouble code ...

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Jan 26, 2016 | Cars & Trucks

1 Answer

Can catalytic converter cause a PO65O code


Pesky PO420 Codes - Eastern Catalytic

www.easterncatalytic.com/education/tech-tips/pesky-p0420-codes/
One of the most annoying is the persistent PO420 diagnostic code (Catalyst System ... not only shows its teeth when the catalytic converter is on the blink, but can also be ... Most, if not all, catalytic converter failures are caused by a problem or ...

P0420 Error Code: Catalyst System Efficiency Below ...

www.obd-codes.com/p0420
Repair information for the OBD-II trouble code P0420 - Catalyst System Efficiency ... If they have failed, it is likely due to something else that caused it to fail. ... the catalytic converter is broken or failed, it may be restricting the exhaust which will ...

explaining trouble codes po420 - po421 - Discount Catalytic ...


Jan 16, 2016 | Cars & Trucks

1 Answer

Car sometimes will not start after sits for a day


Definition of Diagnostic Trouble Code P0420 Category: Powertrain Definition: Catalyst System Efficiency Below Threshold Bank 1Note: This definition of P0420 is applied to all manufacturers

Definition of Diagnostic Trouble Code P0430 Category: Powertrain Definition: Catalyst System Efficiency Below Threshold Bank 2Note: This definition of P0430 is applied to all manufacturers

As the code description implies the P0430 code means that the vehicle's control module has detected that the three-way catalytic converter is not working properly (is not as efficient as the factory is expecting). Replacing the oxygen (O2) sensors may sometimes fix the code, but in most cases the catalytic convert needs to be replaced to fix the problem. If the P0430 code is combined with other codes, try fixing the other codes first.

Jul 11, 2015 | 2006 Toyota Solara

3 Answers

I have a p0420 code on my 2010 Jetta, already changed my 02 sensor. the car has only 70k miles on it, should I change the CAT or look at something else?


I wood look at somin else clear the code if it comes back then we should seewhat we can do as anything Changes since it has been on ? Let me Know thks for your time

May 10, 2015 | 2010 Volkswagen Jetta

2 Answers

P0420


Hi Osar-
I pulled this link from ODB-codes.com. It lists the possible causes, diagnostics and resolution for engine code issues. Hope this helps!
P0420 OBD II Trouble Code

Apr 02, 2014 | 2004 Mazda 3

2 Answers

My 1999 Chev Tahoe will not start - Has codes p0430 and p0420


Hi Charlie,
Diagnostic Test Codes (DTCs) P0420 and P0430 ar "Catalyst Efficiency" codes. These simply mean that the catalytic converters in your vehicle are not performing the way they should be. To fix these codes, you will most likely have to replace the converters. However, these codes do NOT indicate why your engine wil not start. There are many things that can cause an engine to not start. Many of which may or may not set fault codes. You need to determine if the engine is getting fuel and ignition first then go from there.

Dec 17, 2011 | 1999 Chevrolet Silverado 1500

1 Answer

Mil bulb not work .conector damage.mil commando on code # p0420.p0401.p0740


P0420 = catalyst system efficiency below threshold (bank 1).

P0401 = Exhaust gas recirculation-insufficient flow detected

P0740 = Torque converter clutch, circuit malfunction.

Mar 07, 2011 | Honda Odyssey Cars & Trucks

2 Answers

1997 4Runner failed inspection. The trouble code reported: P0420 Catalyst System Efficiency Below Threshold (Bank1).


you will need to change the catalitic converters. Very common issue and if at all possible do not use after market cats. They will likely cause the same code and cause it to fail inspection.

Dec 27, 2010 | 1999 Toyota 4Runner

3 Answers

I had my car inspected and received P0420 code? what does it mean?


P0420 Error Code: Catalyst System Efficiency Below Threshold (Bank 1) Repair information for the OBD-II trouble code P0420 - Catalyst System Efficiency Below Threshold (Bank 1)
www.obd-codes.com/p0420

Feb 18, 2010 | 2000 Toyota Celica

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