2006 Mustang GT. help with sct diagnostic code - Ford Mustang Forum
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post #1 of 4 (permalink) Old 08-07-2008 Thread Starter
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2006 Mustang GT. help with sct diagnostic code

What is this code for? P0430 CAT SYS EFF BLW THREE 2, my check engine light came on today so i plugged it in to check it out and thats what i got. Could that be a O2 sensor?

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post #2 of 4 (permalink) Old 08-07-2008
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Here is what it means
OBD-II Trouble Code: P0430 Catalyst Efficiency Below Threshold (Bank 2)

are your aft O2s truned off in your tune??

2011 GT Candy Red
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post #3 of 4 (permalink) Old 08-07-2008 Thread Starter
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Aft O2s, you mean aftermarket, i still have the stock sensors in, no i dont think i ever turned them off with the tune. The cars running fine right now, only thing is the light came on. Try new O2 sensors?
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post #4 of 4 (permalink) Old 08-07-2008
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The O2s after the catalytic converters are throwing the codes. They need to be disabled in the tune. Not a big deal, it's just a catalyst efficiency code and has no impact on performance.

1965 Mustang Coupe
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