Question about 2000 Mazda MX-5 Miata

1 Answer

2000 Mazda Miata with OBDII read/communication error

I still have the problem of my car passing the CA required emission test, yet fails to "handshake" with smog test diagnostic computer or several code readers, besides mine. The Check Engine light was not on at first, but now it is on intermittently. This has been going on for 6 months. I have checked all fuses on the panel under the hood, and next to the ODB II plug. They have always been fine. Now what? The car does not pass emission testing if the computer wasn't working, right? Pin 16 does have 12 VDC. What do I check next? I am a laid off federal contractor and can't afford to just take it to the dealer and have them diagnose it.

Posted by Anonymous on

Ad

1 Answer

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    MVP:

    An expert that got 5 achievements.

    Night Owl:

    An expert who has answered 10 or more questions between 12 midnight and 6am on the same day.

    Hot-Shot:

    An expert who has answered 20 questions.

  • Expert
  • 114 Answers

Auto zone will scan it for free, will print out the code, wait the emissions paper will tell you the codes at fault, autozzone will double check for ya.

Posted on Apr 06, 2017

  • leone C Apr 06, 2017

    Auto zone will scan it for free, will print out the code, wait the emissions paper will tell you the codes at fault, autozzone will double check for ya.

  • leone C Apr 06, 2017

    Auto zone will scan it for free, will print out the code, wait the emissions paper will tell you the codes at fault, autozzone will double check for ya.

×

Ad

2 Suggested Answers

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

Ad
emissionwiz
  • 76846 Answers

SOURCE: mazda miata computer not comminicating to obdII

You likely just have a blown fuse at the diagnostic connector, check to see that you have 12 volts at pin 16 on the connector. See diagram of pin below.
10_2_2012_8_41_02_pm.jpg

Posted on Oct 02, 2012

Add Your Answer

Uploading: 0%

my-video-file.mp4

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

×

Loading...
Loading...

Related Questions:

1 Answer

What does mil cmd fail mean?


MIL is your malfunction indicator lamp, (check engine light)

CMD is the computer interface port, or OBDII port indicating a malfunction communicating with your cars computer

check all the fuses, primarily any marked pcm and retest your vehicle
note: your check engine or MIL has to be on in KOEO state (key on engine off), if the bulb is burned out everything will still work and the OBDII test computer will show MIL status ON, and if you don't have a computer to tell you that, you must get that light to light in the koeo state.

Aug 25, 2014 | Saturn Ion Cars & Trucks

1 Answer

Failed emissions test


First step is to have the code or codes read.If the "check engine light" is on there will be a reason and should be a code or codes to be read.Once you have the codes,you can determine the correction needed to get that "check engine light" out and a valid emissions test completed.Get back to us with the codes found.

Apr 28, 2017 | Saturn Vue Cars & Trucks

2 Answers

Engine Check light


Take it to autozone or another place like it and have them read the codes and tell us what they are.

Jun 19, 2013 | 2011 Jeep Wrangler Sport

1 Answer

Mazda miata computer not comminicating to obdII


You likely just have a blown fuse at the diagnostic connector, check to see that you have 12 volts at pin 16 on the connector. See diagram of pin below.
10_2_2012_8_41_02_pm.jpg

Oct 02, 2012 | 2000 Mazda MX-5 Miata

1 Answer

OBDII COMMUNICATION FAILURE


If your engine light is coming on, then there is a code somewhere in the computer,it may be a pending code.Its possible your computer is bad. Have your computer tested.

Apr 09, 2010 | 2003 Saturn VUE

1 Answer

What will bring readings into limit


A failing oxygen (O2) -sensor will give failing emission tests. Normally you also get other symptoms:

- too high fuel consumtion
- bad acceleration, stalling problems, sputtering
- the check engine light comes on indicating that the engine control unit has recorded error codes (which will be related to readings of incorrect fuel/air ratio when read by the OBD diagnostics tool at a repair shop).

It is always a good idea to see if you can get any readings from the check engine light if present or much better by an OBD reader to be as certain as possible.

Another component that could cause failing emissions tests is the catalytic converter, giving a similar range of symptoms. To determine if this is the cause is not so easy on older cars with only one O2 sensor, it requires diagnostic skills and equipment. On newer cars with OBDII-systems it will give a recognizable fault code for the cat converter.

Then there are also the issues of the actual cause of malfunction in either or both of these components, is it due to old age and normal wear and tear or is it due to contamination from burning oil (blue tail pipe smoke) or anti-freeze (white smoke), misfiring, etc? Then the cause must be treated as well for a successful repair.

Normally these components have a very long life span and should not have to be replaced more than once or maybe twice for the sensors during the car's lifetime in an otherwise health engine.

Good luck!

May 25, 2009 | 1992 Honda Accord

1 Answer

Emission test found some trouble codes


U0121 Communication error to ABS HU/CM

Apr 06, 2009 | 2005 Mazda 6

3 Answers

ASM 2525 NO ppm TAILPIPE EMISSIONS failure


have you had the the engine codes pulled and reset?
and if so what are your engine codes?
i dont know of any car that will pass emissions test with the engine light on.
we cure your trouble that caused your engine light to come on and you will pass your test.
later
paul

Nov 24, 2008 | 2002 Toyota Sienna

1 Answer

SMOG TEST


If it was originally intended for Texas, it's probably been made as a 49-state-compliant vehicle (CA has stricter emissions). To pass in CA, you may need some new parts for the truck in order to get it to pass. Or you may find that the best course of action is to sell the truck and buy a CA-emissions car.

The CA DMV may well have information available on how to get non-CA-compliant cars to pass the CA emissions testing.

Aug 25, 2008 | 1997 Nissan Pickup

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

Related Topics:

25 people viewed this question

Ask a Question

Usually answered in minutes!

Top Mazda Experts

yadayada
yadayada

Level 3 Expert

76846 Answers

Colin Stickland
Colin Stickland

Level 3 Expert

22246 Answers

Jeffrey Turcotte
Jeffrey Turcotte

Level 3 Expert

8560 Answers

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

Answer questions

Manuals & User Guides

Loading...