Question about 1997 Chevrolet Astro

1 Answer

What is PO420 code

My 97 astro failed the emission test under this code po420, can you tell me what it is? Is it catalytic converter related problem and I need to replace it?

Thank you for your assistance.

Posted by on

  • Anonymous Dec 20, 2008

    chevy tahoe


×

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

  • Master
  • 625 Answers

It sounds like the catalytic at bank one where the number one cylinder is might be bad but it could be the 02 sensor also
have the catalitic test or removed from a mufler shop and have them inspect it iside for damage
if it is bad then replace it,
you can also top on it if you hear like little rocks inside that means is not good and must to be repalced

Posted on May 29, 2008

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

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

P1443,p0401 and po420 failed emission


P1443 is an EVAP code which means the purge control solenoid.P0401 is an EGR valve and code p0420 is a catalytic converter.

Mar 28, 2014 | Cars & Trucks

1 Answer

P1443,po420 and po401 -failed emission... how to repair


p1443 is Purge control solenoid , p0420 is catalytic converter and Egr vale for code p0401

Mar 28, 2014 | Cars & Trucks

1 Answer

Ford obd error code p0420


clogged catalytic converter, replace it with a new one, or remove old one, use a long pipe and punch a hole through it, empty out the pieces, and reinstall. That will work if you don't get the sniffer stuck on your exhaust during emissions testing, as your emissions will be very high using my pipe through the converter method.

Dec 16, 2013 | Ford E-350 Super Duty Cars & Trucks

2 Answers

Trouble code po420?


that is the code for the catalytic convertor. it is either bad or not working at optimal levels. In most cases this in not such a big deal unless you live in a state that does emission testing buy pug in and not tail pipe emissions. Most states now use a quick OBD II plug-in test to check emissions compliance on 1996 and newer vehicles. The plug-in test is faster, easier and cheaper to do than a loaded mode tailpipe emissions test on a road simulator or dynamo-meter. The rules in most states say to pass the OBD II plug-in test, the vehicle (1) must have a fully-functional OBD II system (Check Engine lamp works and the diagnostic connector communicated with the engine computer), that the Check Engine light must be off and that there are no current codes in the computer's memory. If this is the case than you're going to have to replace the converter.

Apr 05, 2012 | 2004 Chevrolet Impala

1 Answer

Im trying to get my mother in laws 2006 chevy equinox to pass emissions the codes po171 and po420 keep coming up po171 is lean bank one and po420 is catalyst below efficency im trying to narrow it down to...


For the lean condition I wound look for vacuum leaks.I you don`t find any then replace the o2 sensor for bank 1.As for the po420 if the exhaust system is not bent or damaged you will have to replace the catalytic converter.The catalytic converter has a longer warranty then the regular vehicle warranty itself so call the dealership and find out if the converter is still under warranty.The usual warranty I believe is around 80k.mileage years is 7 or 8 not positive.Hope this helps.Good luck.

Sep 15, 2010 | Chevrolet Equinox Cars & Trucks

3 Answers

Po420 code monte carlo ls 2001


PO420 code is for catalyst system efficiency below threshold (bank 1) Usually it means that it is time for a new catalytic converter on bank number 1. Cylinder bank number 1 is always the bank with the number 1 spark plug in it.

Apr 20, 2010 | 2001 Chevrolet Monte Carlo

1 Answer

Service soon light on code 90420-


po420 is catalytic converter efficiency. You will have to replace it to keep the light off. But as long as you live in a state that doesnt require emission test you can ignore it and it won't effect the way the van runs

Mar 28, 2010 | 1998 Dodge Caravan

5 Answers

Po420 haunting me 03 jetta 1.8t


You're going to have to have the codes read and find out what is setting that light on. After that problem is repaired, the car must indeed complete a drive cycle, not nessacarily 200 miles. This lets the computer run all it's tests and set all its readiness monitors. If you know what the code number is now, post it and I'll tell you the most likely cause, and repair.

Feb 04, 2010 | 1998 Volkswagen Jetta

1 Answer

Troubleshooting code PO420


In almost all cases, a P0420 code indicates a problem with 1 or more O2 sensors. They send incorrect emissions information back to the ECM and trigger the Check Engine Light. If the Catalytic Converter is fine (no problems with the engine hesitating or getting a lot of heat from under the car) then it's most likely the O2's.

Dec 13, 2009 | 2001 Saturn L-Series

Not finding what you are looking for?
1997 Chevrolet Astro Logo

Related Topics:

281 people viewed this question

Ask a Question

Usually answered in minutes!

Top Chevrolet Experts

yadayada
yadayada

Level 3 Expert

64052 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

21990 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6812 Answers

Are you a Chevrolet Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...