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-   -   Unknown Codes (https://www.gtcarz.com/chevy-gmc-70/unknown-codes-107103/)

graffiti oner 09-10-2007 04:43 PM

Unknown Codes
 
What do these codes mean: 1. P0430 - Catalyst System Efficiency Below Threshold (Bank 2).....I heard that's a bad O2 sensor but which one if there's 4? 2. P0481 - Cooling Fan 2 Control Circuit Malfunction. Any ideas?

paarman97maro 09-10-2007 06:04 PM


Originally Posted by FrYd-RyS
theres 1 o2 sensor to my knowledge. and if its the 02 sensor it will says low voltage 02 or 02 malfunction...as mine did when i read it a week ago

If you dont know, please dont answer.

There are 4 02 sensors, one in each header, one before the cat and one after. And you can get several types of codes for an 02 malfunction.

http://www.projectcamaro.net/forum/s...ead.php?t=9505

archemedes 09-10-2007 06:04 PM

cooling fan sounds like a short possibly, as for the catalyst, it could be a bad sensor, probably the one just before the cat on bank 2 (drivers side?) if you haven't ever replaced the sensors do all 4 the computer and engine will thank you (that is supposed to be done at I believe 65k)


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