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You have a P0420 code on my Chevy Cavalier - 1998 Chevrolet Cavalier

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A P0420 code is for the catalytic converter

Posted on Oct 28, 2012

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I have a 2005 Chevy Equinox LS that shows the problem light code P0420. How can I fix this?


Do you know what a catalytic converter is ? P0420 How To Diagnose Bad Catalytic Converter EricTheCarGuy Your best bet , take your vehicle to a qualified repair shop that knows how to diagnose this P0420 code .

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My 2005 chevy equinox keeps showing problem code P0420 How do I fix this problem?


0 2 sensor near the catalytic converter or

replace the catalytic converter

The downstream O2 sensor reading should be fairly steady. Typically the P0420 code triggers the Check Engine Light if the readings of the two sensors are similar.

Read more at: https://www.obd-codes.com/p0420
Copyright OBD-Codes.com

https://www.obd-codes.com/p0420

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2003 chevy trailblazer code p0420


Is your engine temperature at 210 degrees? Need a scan tool for this, the guage isn't reliable. If not, cheapest thing to do 1st would be change your thermostat if it's not at 210. If that doesn't work, have your catylitic converter back pressure tested. You could try some Cat Clean added to your gas too as cats are expensive.

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Error codes for my car?


try reset and see how many came back.

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Does any one know normal voltage readings for a 2003 chevy cavalier


Trouble Code: P0420

Catalyst System Low Efficiency

Possible Causes:


Air leaks at the exhaust manifold or in the exhaust pipesBase engine problems (i.e., high engine oil or coolant usage)Catalytic converter is damaged, contaminated or has failedContinuous engine misfire conditions, or weak or low coil outputFront HO2S or rear HO2S is contaminated with fuel or moistureRear HO2S is loose in the mounting hole (check it for a leak)Front HO2S older (aged) than the rear HO2S (HO2S-12 is lazy)

Dec 05, 2012 | Chevrolet Cavalier Cars & Trucks

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2006 chevy cobalt(85000 miles) check engine light comes on and stays on. I am getting the check engine light code p0420. Engine seems to be running smoothly.


http://www.obd-codes.com/p0420

TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
TSB Number: 3316 NHTSA Number: 10017210 TSB Date: n/a Date Added to File: October 27, 2005 Failing Component:Electrical System Summary:Diagnostic trouble code P0420 may set on low mileage vehicles, or shortly after catalytic converter replacement
there is a service bulletin for this.

http://www-odi.nhtsa.dot.gov/cars/problems/tsb/results.cfm?start=1&SearchType=DrillDown&type=VEHICLE&year=2005&make=CHEVROLET&model=COBALT&vehtype=PC&typenum=1&component_id=0&summary=true

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1 Answer

Where is the torque convertor solinoid located on a 47re


Its under the transmission oil pan on the inside of it code P0420 or close you should take it a trany shop let them service the transmissioni fix cars all the time and i wouldn;t try to do this my self you just need to much speicalized equipiment to diagnose the cause of the problem No i take that code back P0420 is the twr cataytlic convertor torque convertor is TCC and there is half a dozen codes that may apply

Nov 22, 2010 | 2005 Chevrolet Cavalier

1 Answer

Chevy caviler 1999 with P0420 whats the problem,what is P0420?


This refers to your catalytic converter located on the exhaust system. This can possibly be a problem with one of the oxygen sensors used to evaluate catalytic converter performance.

Jul 26, 2009 | 1999 Chevrolet Cavalier

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