06-09-2011, 04:23 pm
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| Corvette Enthusiast Join Date: Nov 2008 Posts: 9
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|  Check engine light with new exhaust system
Last october,I bought a 2002 Z06 with a modified exhaust system(someone had tried to make a bypass to get more sound) It gave check engine light with theses codes PO172-PO175-PO420-PO430 I have installed a cat back borla system 140039 What a great sound but the light and the codes are coming after being flushed. Is it possible that a sensor was already out of service or is there any problem with borla systems? Many thanks for any informations. | ||||||||||||||||||||
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06-10-2011, 07:03 am
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| GM World Class Certified Technician  Join Date: Nov 2006 Location: New Haven Ct Posts: 5,141
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HI there, Your codes, P0172/0175 are showing that your engine is running rich. The p0420/p0430 is saying that your catalytic converters are NOT working. Did you remove them ???/ Allthebest, c4c5 | ||||||||||||||||||||
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06-10-2011, 03:20 pm
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Thanks for the information but the catalytic converters are there.May be I should change them?
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06-10-2011, 04:55 pm
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| GM World Class Certified Technician Join Date: Nov 2006 Location: New Haven Ct Posts: 5,141
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Hi there, Are they OEM catalytic converters ???? or are they matched to the headers ? Allthebest, c4c5 | ||||||||||||||||||||
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06-14-2011, 08:24 am
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They are genuine GM converters.The front and middle system are GM. I have borla system only in the back of the car.
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06-14-2011, 10:42 am
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What do you mean when you say "after being flushed"? What exactly was flushed? | |||||||||||||||||||||
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Master Technician 20 year ASE Master Certified Tech 1998 black 6spd convertible | ||||||||||||||||||||||
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06-14-2011, 12:00 pm
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Do you know if headers were on the car before you bought it? Can you get under the car and check the wiring to the O2 sensors?
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BruceF|
06-21-2011, 09:03 am
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The codes and the check engine light were "flushed" (tooked off) by disconnecting the batterie but naturelly they come back after a hundred miles. The headers or exhaust manifolds were on the car.They are original equipment.There is no problem on the wiring. What do you think of Bosal direct fit catalytic converters to replace mine? Thanks and have a good day. | ||||||||||||||||||||
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