Check Engine Light

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Check Engine Light

Post by sgt tunez on Wed Mar 27, 2013 11:38 pm

HELP!

My car is reading two codes: P0128 & P0430. I read up on them a little and kind of understand what could be wrong. Just not sure what I should do. I cleared the codes and they haven't come back on yet but I'll test it tomorrow. I'll update more later.
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Re: Check Engine Light

Post by saus24 on Fri Mar 29, 2013 3:22 pm

good luck. i have no clue.

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Re: Check Engine Light

Post by moddog on Fri Mar 29, 2013 3:40 pm

sgt. I got this over on the lx forum. PO430

I got this on my 5.7L when it would run in MDS for long periods of time. It turned out to be a small leak in the flex joint by the catalytic. Just some information on what I experienced.
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Re: Check Engine Light

Post by sgt tunez on Sat Mar 30, 2013 10:44 am

Thanks moddog. I've heard that before. I'm going to check it out. I want to disable MDS anyway.
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Re: Check Engine Light

Post by 345PAHemi on Fri Apr 26, 2013 7:11 pm

sorry i didnt respond earlier so not sure if you still got the codes coming on but P0128 is a malfunction of the thermostat - are u running hot? if so, u may need to change t-stat

And P0430 is catalyst system efficiency - like charles said it could be a leak
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Re: Check Engine Light

Post by moddog on Fri Apr 26, 2013 9:29 pm

That happens some time with the 180 deg. stat.
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Re: Check Engine Light

Post by sgt tunez on Sun Apr 28, 2013 4:29 pm

Light went off by itself and hasn't come back. Car seems to be running fine.
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Re: Check Engine Light

Post by 345PAHemi on Fri May 03, 2013 11:14 pm

ok. good.
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Re: Check Engine Light

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