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disable P0300 test

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Old Apr 15, 2009 | 03:27 PM
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  #196  
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BarryC
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From: Ireland
Originally Posted by Dragon-V
Hi,

I keep getting a P0300 fault code, it happens at 65-70 mph in 5th gear when cruising.

I am using a evo7 ecu with the 9055001 rom.

Bits 4/5 are set to 0, I have tried the 0XEFCF code in the ECU_PERERHERY 2 and still get the P0300 code.

The code I have in the std rom under ECU_PERERHERY 2 is 0X8889.

Can anyone help me as I am at my wits end as it happens every 10 mins.

Thanks
Lee
mate of mine has the very same issue
seems the perephery bits are not correct for this evo 7 rom
or it just disables the test not the actual code or something
anybody got a proper solution to this problem ?????
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Old Apr 19, 2009 | 06:53 PM
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  #197  
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bondango
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From: Ireland
Originally Posted by BarryC
mate of mine has the very same issue
seems the perephery bits are not correct for this evo 7 rom
or it just disables the test not the actual code or something
anybody got a proper solution to this problem ?????

started getting this code aswell, just cruisng around 30-40mph, E7 (9055001) ecu in an E6
Last edited by bondango; Apr 19, 2009 at 06:58 PM.
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Old May 2, 2009 | 01:23 AM
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  #198  
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xspsi4
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I am going to give this a go.
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Old Jun 16, 2009 | 11:56 AM
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juzdyn
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I just did this yesterday, and it seems to have worked perfectly. So far it hasn't come back on yet. But a quick question to those who have disabled it....are you now able to get the car inspected without any problems? It won't fail because of this correct? I have inspection coming soon and i need a solution to this if i can't go get it regularly inspected.
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Old Jun 16, 2009 | 06:33 PM
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mt057
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From: DFW
You will pass as long as this is your only code being thrown.
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Old Jun 16, 2009 | 06:41 PM
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wesside
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From: Slc Utah aka SL,UT
Originally Posted by juzdyn
I just did this yesterday, and it seems to have worked perfectly. So far it hasn't come back on yet. But a quick question to those who have disabled it....are you now able to get the car inspected without any problems? It won't fail because of this correct? I have inspection coming soon and i need a solution to this if i can't go get it regularly inspected.
as long as your car isnt throwing a code you have no problem!
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Old Jun 17, 2009 | 07:46 AM
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juzdyn
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From: NYC
well if i put back on the reader, which i haven't tried yet, it shouldnt read the p0300 code anymore if the CEL is off correct? So i guess i'm good? thanks guys
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Old Jun 20, 2009 | 04:13 PM
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juzdyn
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ok so after 300 miles, my CEL came back on....anyone else have this problem? Did this fix not work for some people? Please advise!
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Old Jun 20, 2009 | 05:54 PM
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mrfred
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From: Tri-Cities, WA // Portland, OR
Originally Posted by juzdyn
ok so after 300 miles, my CEL came back on....anyone else have this problem? Did this fix not work for some people? Please advise!
You did something wrong because setting the periphery bit to zero disables the test, and its not a hack or workaround. Its a built-in feature of the ROM code.
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Old Jun 20, 2009 | 07:33 PM
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juzdyn
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From: NYC
hmm maybe it's another problem which I really hope not. I'm gunna get the code reader tomorrow to find out what it exactly is. I will update u guys tomorrow night
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Old Jun 21, 2009 | 10:37 AM
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Steiner
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Originally Posted by juzdyn
hmm maybe it's another problem which I really hope not. I'm gunna get the code reader tomorrow to find out what it exactly is. I will update u guys tomorrow night
It could be entirely different code.
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Old Jun 23, 2009 | 10:01 PM
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  #207  
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Originally Posted by Steiner
It could be entirely different code.
yeap u were right. totally different code, p0170, system lean
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Old Jul 6, 2009 | 07:05 AM
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evojon
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From: Greencastle, PA
Finally sat down to do this. Followed along with the youtube video (easy enough), loaded it up and drove it. No issues and no more 0300 codes. Awesome.
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Old Nov 15, 2009 | 05:49 PM
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DBallz
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If you already have the CEL and reflash to disable the test will the CEL go away?
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Old Nov 15, 2009 | 07:22 PM
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mrfred
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From: Tri-Cities, WA // Portland, OR
Originally Posted by DBallz
If you already have the CEL and reflash to disable the test will the CEL go away?
Yes.
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