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Old 11-22-2012, 12:47 PM   #1
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Default Fing P0420 again. any ideas?

Ok so over the past 8 months.

Cat was bad replaced it, front 02 was replaced, rear 02 was reading bad changed it.

Still getting the code ever 2 months or so.

I'm out of ideas and do not have time to check or work on the car anymore for about a month. (buying house)

I've heard the coil packs could be going bad but the car is running smooth as ever. How do I check the coil packs?

Do I check for exhaust leaks?

Could a dirty (caked with oil and grime) crank sensor cause something to be off?

I;m frustrated.

https://www.miataturbo.net/general-m...ank-1-a-61081/

Last edited by Pitlab77; 11-22-2012 at 12:58 PM.
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Old 11-22-2012, 03:53 PM   #2
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my obdII reader is not reading 02 sensor 2.
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