986 Forum - The Community for Porsche Boxster & Cayman Owners - View Single Post - CHIP? 02 sensor issues. Anyone ever ran across this?

tholyoak · 02-01-2008, 01:19 PM

You guys need to listen to tool pants. The second sensor is there to determine cat efficiency. If you run the OBDII program in the ECU you need at least 2 cats and 4 O2 sensors or somehow do a band-aid solution into tricking the ECU into thinking that the cat is there by using a false signal for the after cat sensor. The same can be accomplished by running an ROW ECU program as these cars only use a pre-cat sensor for mixture determination and don't have an after cat sensor for Cat efficiency.

Todd

02-01-2008, 01:19 PM	#11
tholyoak Registered User Join Date: Jan 2006 Location: Glen Allen, ON Posts: 314	You guys need to listen to tool pants. The second sensor is there to determine cat efficiency. If you run the OBDII program in the ECU you need at least 2 cats and 4 O2 sensors or somehow do a band-aid solution into tricking the ECU into thinking that the cat is there by using a false signal for the after cat sensor. The same can be accomplished by running an ROW ECU program as these cars only use a pre-cat sensor for mixture determination and don't have an after cat sensor for Cat efficiency. Todd __________________ Current Cars: 1989 911 Targa 1984 944 Original Owner 1971 911T