Any Ideas for a P0420 cell?
12-05-2006, 09:40 PM
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Any Ideas for a P0420 cell?
I have the rotary performance Midpipe with the Hi-flow cat. i have had it for about 6 months now. Everything has been fine. About two weeks ago the check engine light would come on and go off about once a day. While the car was at mazda for warranty work, they went ahead and pulled the code and said that it was from the o2 sensor. Well for the past 3 days it has stayed on solid. Any Ideas??
12-06-2006, 10:56 AM
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''P0420 = Catalyst system efficiency below threshold''
It looks as if the ''Hi-Flow'' CAT is not doing its job.
According to the workshop manual the monitoring condition for this CEL are;
1 - ECT = more than 158F
2 - Catalyst converter temp: more than 752F
3 - LOAD = 20 to 50percent (maximum calculated load values varies depending on engine speed)
4 - Time with purge control system does not operate: more than 20s
It also says possible causes are;
1 - Looseness of Front HO2S sensor.
2 - Leakage exhaust gas.
3 - Purge control system malfunction.
4 - VSS malfunction.
5 - ECT malfunction.
6 - Eccentric shaft position sensor malfunction.
7 - PCM malfunction.
I am no expert here so am only quoting the manual, but I would guess that the Hi-Flow CAT is not operating within expected parameters.
Hope that helps.
It looks as if the ''Hi-Flow'' CAT is not doing its job.
According to the workshop manual the monitoring condition for this CEL are;
1 - ECT = more than 158F
2 - Catalyst converter temp: more than 752F
3 - LOAD = 20 to 50percent (maximum calculated load values varies depending on engine speed)
4 - Time with purge control system does not operate: more than 20s
It also says possible causes are;
1 - Looseness of Front HO2S sensor.
2 - Leakage exhaust gas.
3 - Purge control system malfunction.
4 - VSS malfunction.
5 - ECT malfunction.
6 - Eccentric shaft position sensor malfunction.
7 - PCM malfunction.
I am no expert here so am only quoting the manual, but I would guess that the Hi-Flow CAT is not operating within expected parameters.
Hope that helps.
Last edited by O'Renesis; 12-06-2006 at 11:03 AM.
12-06-2006, 12:59 PM
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go to autozone and get a spark plug anti fowler kit. the package comes with two. take one and drill out the center with a .5 inch drill bit. screw the one you drilled the hole in into the other anti fowler. then screw the assymbly into the secondary o2 port then connect the o2 sensor ( may take a few times to get the right kit that fits the o2 ) this will hide the increase in exhaust flow from the ecu
12-07-2006, 06:46 PM
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Originally Posted by TeamRX8
it absolutely does not work on an RX-8, do teh s3arch
Jeez, why the F*ck was it even posted then. Sorry TeamRX8. Didnt mean to offend you!
01-28-2007, 07:01 PM
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Well, the CEL did come back with the CZ. I took off the RP Midpipe and no CEL. So its coming from the midpipe. Is that Highflo cat suppose to prevent a CEL? Should it be something that should be fixed from Rotary Performance?
01-28-2007, 07:12 PM
#15
Originally Posted by rx8guy86
Well, the CEL did come back with the CZ. I took off the RP Midpipe and no CEL. So its coming from the midpipe. Is that Highflo cat suppose to prevent a CEL? Should it be something that should be fixed from Rotary Performance?
beers
01-31-2007, 07:00 PM
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Actually, I talked to Rotary Performance. Last week the got the shipment of new cats in. This week or next week they will begin the testing stage before they ship them out.
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