Question about 2006 Suzuki Verona

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2006 suzkui verona is jearking has been slow to accelerate in past alson has 2 p0420 codes

When it was colder outside the car would act like it didn't want to go RPM would rev up but car would not go. Had transmission sensor replaced also a egr and PVC value And gasket replaced. Now the car is jerking randomly feels all most as if it wants to stall really do not know what is going on HELP PLZ

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You may need transmission serviced. Goto Midas, I believe it's free to check vechicle on OBD Scanner. If they find a problem they'll let you know exactly what codes they get. Either you can have someone you know fix or they can fix.

Posted on Apr 14, 2014

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Posted on Jan 02, 2017

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P0420 fault not going away


covers other aspects as well.

P0420 Chevrolet - Catalyst System Low Efficiency Bank 1 Repair Importance Level: 2/3 Repair Difficulty Level: 2/3 alt="What does this mean?"> alt="PDF"> alt="Share Code"> 3 alt="P0420 Chevrolet Comments"> ' Add Comment alt="Close Selection"> http://engine-codes.com/p0420_chevrolet.html Forum Code Possible causes - Three way catalyst converter Bank 1
- Exhaust tube
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Powertrain Control Module (PCM)
alt="What does this mean?"> What does this mean? Tech notes As the code description implies the P0420 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 P0420 code is combined with other codes, try fixing the other codes first.
alt="What does this mean?"> What does this mean? When is the code detected? If a condition exists which causes the Powertrain Control Module (PCM) to detect excessive Bank 1 HO2S #2 activity outside of an acceptable range for an extended period of time, the PCM will set the P0420 code. This indicates that the three-way catalytic converters oxygen storage capacity is below a threshold considered acceptable. Possible symptoms - Engine Light ON (or Service Engine Soon Warning Light) P0420 Chevrolet Description In order to maintain a reasonably low emissions of Hydrocarbons (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx), the engine controls system uses a three-way catalytic converter. The catalyst within the converter promotes a chemical reaction which oxidizes the HC and CO present in the exhaust gas. This reaction converts them into harmless water vapor and Carbon Dioxide. The catalyst also reduces NOx, converting it to Nitrogen. The Powertrain Control Module (PCM) monitors this process using Bank 1 HO2S #2. Bank 1 HO2S #2, located in the exhaust stream past the three-way catalytic converter, produces an output signal which indicates the oxygen storage capacity of the catalyst. This determines the catalysts ability to convert exhaust emissions effectively. If the catalyst is functioning correctly, the Bank 1 HO2S #2 signal will be far less active than that produced by Bank 1 HO2S #1.


Read more: http://engine-codes.com/p0420_chevrolet.html#ixzz3n9JdbrFG

Sep 29, 2015 | 2009 Chevrolet Lumina SS

1 Answer

I have a 2002 yukon xl 1500 slt 5.3 and I took it to auto zone gave me a code of p0420.Do u have any suggestions on this code?And what can I do about it?I don't have any money and I need my vehicle.Can you...


P0420 GMC - Catalyst System Low Efficiency Bank 1 ' Add Comment
Possible causes
- Three way catalyst converter Bank 1
- Exhaust tube
- Intake air leaks
- Fuel injectors may be faulty
- Fuel injector leaks
- Spark plugs may be faulty
- Improper ignition timing
- Powertrain Control Module (PCM)
What does this mean?
Tech notes
As the code description implies the P0420 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 P0420 code is combined with other codes, try fixing the other codes first.
What does this mean?
When is the code detected?
If a condition exists which causes the Powertrain Control Module (PCM) to detect excessive Bank 1 HO2S #2 activity outside of an acceptable range for an extended period of time, the PCM will set the P0420 code. This indicates that the three-way catalytic converters oxygen storage capacity is below a threshold considered acceptable.
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
P0420 GMC Description
In order to maintain a reasonably low emissions of Hydrocarbons (HC), Carbon Monoxide (CO), and Oxides of Nitrogen (NOx), the engine controls system uses a three-way catalytic converter. The catalyst within the converter promotes a chemical reaction which oxidizes the HC and CO present in the exhaust gas. This reaction converts them into harmless water vapor and Carbon Dioxide. The catalyst also reduces NOx, converting it to Nitrogen. The Powertrain Control Module (PCM) monitors this process using Bank 1 HO2S #2. Bank 1 HO2S #2, located in the exhaust stream past the three-way catalytic converter, produces an output signal which indicates the oxygen storage capacity of the catalyst. This determines the catalysts ability to convert exhaust emissions effectively. If the catalyst is functioning correctly, the Bank 1 HO2S #2 signal will be far less active than that produced by Bank 1 HO2S #1.

Mar 31, 2015 | 2002 GMC Yukon XL

1 Answer

06 Suzuki Verona has two upper oxygen sensors is


read your other ANON post first.
Double posted, an again , no engine stated.
is this the I-6, inline SIX? 2.5L

my wild guess is you get DTCs for bank 2, right?

example this? (this is farthest from crank pulley)
Trouble Code: P0050 2.5L I6
HO2S Heater Control Circuit Bank 2 Sensor 1
Number of Trips to Set Code: 2
Trouble Code Conditions:
HO2S-1 heater (bank 2) control circuit is open circuit.

Oct 04, 2014 | 2006 Suzuki Verona

1 Answer

P0420 code in a 2006 Suzuki verona Should I start by changing the downstream 02 sensor in the cat before considering a new cat? I have a leaking front flex pipe would that affect this?


Yes, the leaking flex pipe could cause this code. You need to fix that, clear the code and re test. BUT: This vehicle has had issues with the catalytic converters coming apart and ruining the engine. It can suck catalytic converter pieces into the engine. When the converter is removed, visually inspect for damage.

Sep 04, 2014 | Cars & Trucks

2 Answers

Acted like it was not getting enough gas; asked Star and they gave me the codes P0420, P0101, and P0068.


Google the codes and you should find explanations for each. AutoZone has free repair manuals online as well.

Apr 15, 2013 | 2008 Pontiac G6 Sedan

2 Answers

What is wrong when this code shows up p0420 shows up..This is a 2006 nissan sentra


P0420 NISSAN - Catalytic Converter Efficiency Below Threshold Bank 1

The most common cause for the OBDII code P0420 on Nissan vehicles is the three way catalytic converter Bank 1 has reached the end of its useful life.. Since this is a very expensive part you need the code fully diagnosed as some other things like exhaust leaks or poor engine tune can cause it as well

Oct 05, 2012 | 2006 Nissan Sentra 1.8

1 Answer

Error coce P0420 on OB-2 scanner


P0420 = Catalyst System Efficiency Below ThresholdCatalyst System Efficiency Below Threshold. This means that the secondary O2 sensor detects that the catalytic converter isn't working as efficiently as it should. This engine code can be triggered by any one of the following:

1.) The catalyst in the catalytic converter is cracked, clogged, or otherwise damaged.
2.) The secondary O2 sensor is malfunctioning.
3.) There is an exhaust leak.
4.) The computer unit is faulty

Sep 28, 2009 | 2006 Chevrolet Malibu

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