Question about 1995 Chevrolet Blazer

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P0420 p1351 95 chevy blazer?

Dont know what these codes meen

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Here's the complete chart of trouble codes for your Blazer...including the ones that you asked for. Hope it helps! Have a great day!




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Posted on Nov 23, 2008

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95 CHEVY BLAZER SHIFTS INTO 4LOW BUT NOT 4 HI???? PLEASE HELP NEW BABY SNOWY ROADS AND NO 4 HI!!!!!!!!

Posted on Dec 14, 2009

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Posted on Jan 02, 2017

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1 Answer

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 .

Feb 03, 2017 | Chevrolet Equinox Cars & Trucks

1 Answer

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

Feb 03, 2017 | Cars & Trucks

1 Answer

How cani tell if my catelletikconverter is bad


your cat does not seem to be working right, see the following info for other possibilities.
P0420 OBD II Trouble Code

Mar 12, 2015 | Cars & Trucks

1 Answer

1999 chevy blazer 4wd 6 cyc 4dr code P0420 Catalyst System effecency below threshold Bank 1 confirmed


There is a chance that your temp sensor is the culprit on both codes. The temperature sensor is what tells the ECU how hot or cool the engine is and weather or not to keep the engine in phase lock loop, or choke, mode. If the engine stays in phase lock it will run too rich and the O2 sensor will not be able to compensate.

Aug 04, 2014 | 1999 Chevrolet Blazer

1 Answer

Code reading p0420 on '99 chevy s10 blazer, low catalyst threshold. Is this a bad catalytic converter or burned valves?


there are a couple of things to consider here. That code indicates that the O2 sensor behind the cat is not functioning like the engine computer expects-either the cat itself is not functioning properly or you may have an exhaust leak, or the heater circuit in the O2 sensor is faulty. The cat should get up to 600 degrees and it burns unburned fuel before ti gets to the 2ed O2 sensor-if it cannot do this, the CEL comes on and you have a P0420. Before replacing the cat, clear the code and see if it comes back-if it does, you might try first replacing the O2 sensor. If that doesn't work, get a 'oil fouler' spark plug adapter and install the O2 sensor in it, then install both into the exhaust-this 'shields' the tip of the O2 sensor and slows it down, fooling the engine computer into seeing it switching slowly, as it is supposed to do. Your only other choice is to replace the cat, and an aftermarket cat is much less than an OEM unit.

By the way, if you have burnt valves, a P0420 is the least of your worries.

Apr 01, 2011 | 1999 Chevrolet Blazer

1 Answer

How many oxygen sensors are on a 1999 chevy blazer?i found 3 one on each manifold before the cat and one after the cat. but the guys at the local auto parts store said that there are 4 total. am i missing...


if it has 2 cats then it has four sensors. i cat 3 sensors. i dought they all went bad. o2 sensor malfunction will not cause a cat efficiency belw threshold code. i would guess a baf cat on bank one.but if air pump was bad it might be poluted with carbon.try driving it hard for a bit. mabee it will clean up

May 30, 2010 | 1999 Chevrolet Blazer

3 Answers

Check engine light came on for code p0429


need the code before I can answer this, was it P0420?

Jul 01, 2009 | 1999 Dodge Durango

2 Answers

Chevy Blazer P0303 and P0420


Most probably and if a cat is not flowing proper is causes back preasure that can result in sticking or burned vavles,mechanic not nice by saying ignore the cat effiency code p0420.Can ussually have cat replaced at aftermarket muffler shop for approx. $200 cheaper than valve job or excessive fuel that you have used and damage that may occur to your engine.

Jun 16, 2009 | 1999 Chevrolet Blazer

2 Answers

Not shifting into 2nd gear


Check all of your vacuume hoses to your transmission and you also may have to have your computer in your car reprogrammed.

Apr 10, 2009 | 1998 Chevrolet Blazer

1 Answer

I need to know the color code of my Chevy Blazer 2000 it is green


Check for sticker in glove box. Bunch of numbers & letters, usually last line.(bottom line)

Jan 23, 2009 | 2000 Chevrolet Blazer

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