Question about 2000 Mazda MX-5 Miata

2 Answers

2000 Mazda Miata, check engine light comes on. Code PO420

Had local auto parts store scan code and they came up with PO420. I just bought this car. Seem to run good. Have the 2000 Miata had any problem areas that you know of that would cause this problem?

Posted by on

  • multifavtool Mar 02, 2009

    cat back borla check light no smog not sure code?

  • gyps Apr 16, 2009

    2000 MIATA WHEN THE CHECK ENGINE LIGHT COMES ON I GOT P0300 AND P0421 CODES ,WHAT IS THE POSSIBLE PROBLEM ?

    SPARKS PLUG ,CABLEA,CAT CONVERTER...OR..OR...

×

2 Answers

  • Level 1:

    An expert who has achieved level 1.

    Mayor:

    An expert whose answer got voted for 2 times.

  • Contributor
  • 1 Answer

I HAVE A 2000 MAZDA MIATA AND IT IS BRINGING UP A CODE PO421, CAN YOU TELL ME WHAT THAT IS

Posted on Jun 08, 2009

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Vice President:

    An expert whose answer got voted for 100 times.

    Sergeant:

    An expert that has over 500 points.

  • Expert
  • 184 Answers

The P0420 code is a more common one in general. The description for P0420 is Catalyst System Efficiency Below Threshold (Bank 1). You're going to want to focus your diagnosis efforts on the O2 sensors, catalytic converter, and exhaust system. Here's a great detailed article on that specific code and how to fix it - http://www.obd-codes.com/p0420

Posted on Dec 15, 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:

2 Answers

How reset check engine light


The easiest way to reset a check engine light on almost any modern car is to disconnect the battery wait five minutes and connect it back up. This will not tell you why the check engine light came on. For that you need a ODBII scanner, but if the issue was a gas cap left off and you have fixed that, then check engine the light should go off. I have found that many auto parts stores will read your car's ODBII codes for free.

Jun 30, 2014 | 1990 Mazda MX-5

1 Answer

I have a 2000 Miata and my check engine light has come on. Ultimately, I replaced the battery and alternator. After spending $500 or so, the light has come one again and now it flashes. Any ideas?


First off, flashing is a warning NOT to drive it-unlike a steady CEL, flashing indicates there is a problem that needs immediate attention. When you had the CEL before, did you get the actual code? It might still be related, or could be an entirely different issue, although it is now more serious. If you can, you should drive it very little and straight to a commercial auto parts store to have the computer scanned for code(s)-WRITE the actual codes down, very important, so you can get help for your issue. Pay particular attention to engine temp, how it runs, check oil...do not drive it if it is running hot, has little or no oil, or is running really bad, get it towed-not worth the risk in ruining the engine.

Sep 08, 2011 | 2000 Mazda MX-5 Miata

3 Answers

What does it mean when my 2003 honda pilots check engine light comes on?


Hi, the check engine light will require you to have the engine CPU scanned for trouble code's. This can only be administered with the assistance of a diagnostic computer scan tool OBD II. You can purchase this tool, at your local auto parts store, or you can just have the scan ran at your local auto zone parts store, free of charge. Once the diagnostic scan is administered, you will be able to isolate the issues that have caused the check engine light.
This scan tool will display a print out code and the location of the issue, on the engine, as well. There are Many issues that will cause the engine light to illuminate, but the most common cause will be a failed monitoring sensor, or sensor harness failure(separated power wire, or ground).
After retrieving the code, it will be interpreted to know what caused the lights to come up and that will be used to fix the problem.

Dec 26, 2010 | 2003 Honda Pilot

1 Answer

I just bought a 2003 Mazda Miata last April when my other car died. Today on my way home I noticed the check engine light. My car has 55,000 miles but looks and runs like new. I was checkingon line and...


Good Evening, there are several automotive stores like autozone or advanced auto parts that offer the service of scanning your check engine light for free. It would be very worthwhile to have them do that and retrieve the code or codes that caused your light to come on in the first place, from there we can point you in the right direction for repairs. Hope this helps.

Sep 26, 2010 | 2003 Mazda MX-5 Miata

4 Answers

Check engine light


What is the code, you need to have a scanner hooked up to read it. That is your first step. (Some auto parts stores will read these for free, but will not give you a lot of information.)

May 31, 2010 | 1999 Mazda Protege

2 Answers

How do I reset the check engine light on 2000 audi a6 4.2


get the vehicle scanned for the trouble code most auto stores such as auto zone/advanced auto scan for free check ur local area the check engine comes on when the computer senses a problem or something is not reading right if u want when the code is read the store or mech can and usually do reset the computer

Feb 20, 2010 | 2000 Audi A6

2 Answers

I have a Mazda 2001 MPV, just had service for o2 sensor and now the check engine light is blinking .


blinking light means engine is misfiring. continuing to drive will severely damage the engine. The O2 should not be related to your engine misfiring

Nov 13, 2009 | 2001 Mazda MPV

1 Answer

Mazda 2000 MX-5 convertible, 85000 miles.-check engine light remains on. Have replace the crankcase sensor. stalling quit. Both catalatic converter sensors replaced. do I need to replace the CC now?


It depend on the code. there are a lot of things other than the O2 sensors. Have it scanned and bring the code back to this sight so we can tell what the problem is.

Most Advance and Autozone store will scan it for free.

Hope this helps

Oct 01, 2009 | 2000 Mazda MX-5 Miata

1 Answer

2006 Mazda Miata engine light


you'll hjave to get the vehicle scanned for codes. it could be a variety of problems. eg. egr, O2 sensor . without scanning it for codes you could be replacing may different parts in your vehicle. take it to a repair shop where they have the equiptment to check for codes.

Dec 25, 2008 | 2006 Mazda Miata

1 Answer

2000 mazda miata r&r throttle body


se if egr is controled by vacium or electric
if it is by vacium then locate the egr solenoide and make sure it has vacium in one hose w/ engine runing if it does then replace solenoide

May 31, 2008 | 2000 Mazda MX-5 Miata

Not finding what you are looking for?
2000 Mazda MX-5 Miata Logo

4,441 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mazda Experts

yadayada
yadayada

Level 3 Expert

70387 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22041 Answers

Jeff Turcotte
Jeff Turcotte

Level 3 Expert

6879 Answers

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

Answer questions

Manuals & User Guides

Loading...