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2001 Mazda Miata OBD 2

Tiny
OLDDRUM1
  • MEMBER
  • 2001 MAZDA MIATA
  • 4 CYL
  • 2WD
  • MANUAL
  • 40,000 MILES
My Miata has been stalling and the check engine light has been coming on. Its like it is running on two cylinders. This started on day after going to carwash. I would give codes but cannot find OBD2 connection underdash. Once RPMs are up a little the other one or two cylinders kick in and the car runs fine. The check engine lights blinks sometimes, somtimes stays on and sometimes goes off. It is on now.
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Monday, September 8th, 2008 AT 12:24 AM

13 Replies

Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

Thank you for the donation.

According to my data base, the data link should be under the left hand side of the instrument panel, have a look and if you get the codes post them here for more information.

Mark (mhpautos)
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Monday, September 8th, 2008 AT 5:24 AM
Tiny
OLDDRUM1
  • MEMBER
  • 21 POSTS
Error codes on the Miata are

po300 mod$10 172
Random/multiple cylinder misfire detected

po420 Mod$10 272
catalyst efficiency below threshhold Bank 1
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Monday, September 8th, 2008 AT 1:21 PM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

I have been away for a day, so I will respond with some information when I get access to the data base later today.

Mark (mhpautos)
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Tuesday, September 9th, 2008 AT 5:55 PM
Tiny
OLDDRUM1
  • MEMBER
  • 21 POSTS
I reset the codes last night and my Daughter drove into school and home, about twenty miles. The codes did not happen again. I wonder if I am getting something wet that should not be getting wet?
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Tuesday, September 9th, 2008 AT 10:10 PM
Tiny
OLDDRUM1
  • MEMBER
  • 21 POSTS
I apologize for not following up but I have started getting the above mentioned codes again without any water present. Its like the car is trying to flood or that it is only running on two cylinders for a couple of minutes.
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Sunday, September 21st, 2008 AT 1:11 AM
Tiny
OLDDRUM1
  • MEMBER
  • 21 POSTS
I have not recieved a reply to my question on the Mazada Miata with the code problems. What should I do? I have supplied the codes.
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Monday, September 29th, 2008 AT 1:17 PM
Tiny
OLDDRUM1
  • MEMBER
  • 21 POSTS
I made a donation and provided codes for the problem I am having with the Miata. Why did I not get a reply? Have I made an error? With whom should I contact for a reply?
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Wednesday, October 8th, 2008 AT 11:39 AM
Tiny
MHPAUTOS
  • MECHANIC
  • 31,938 POSTS
Hi there,

sorry about the delay but I have had to deal with the death of my mother this week, I will respond ASAP.

With apologies,

Mark (mhpautos)
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Wednesday, October 8th, 2008 AT 4:31 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
Check for water contamination at the plugs/coils/wires. The cat efficiency code is most likely due to a bad cat converter. Sorry for the delay
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Thursday, October 9th, 2008 AT 9:24 AM
Tiny
OLDDRUM1
  • MEMBER
  • 21 POSTS
I am sorry but someone filed your email and I just found it. Mike is probably going to get ahold of you on this and I want to apologize for that. What do you do with a bad cat converter and why did it just start when the car started flooding?
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Saturday, October 25th, 2008 AT 10:12 AM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
When a cat goes bad it must be replaced. When your engien was misfiring it was dumping raw fuel into the cat which can melt the honeycomb interior and cause the reactive material to melt the inside of the cat
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Saturday, October 25th, 2008 AT 12:47 PM
Tiny
OLDDRUM1
  • MEMBER
  • 21 POSTS
Thanks and oh crap what does that cost?
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Saturday, October 25th, 2008 AT 1:33 PM
Tiny
2CARPRO JACK
  • MECHANIC
  • 11,533 POSTS
They arent very cheap, and I do suggest that you go with an OEM part. The aftermarket ones are less expensive, but they dont perform as well or last as long
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Sunday, October 26th, 2008 AT 8:09 AM

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