Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - How to test and when to replace Oxygen Sensors?

ksa8907 · 01-25-2015, 10:15 AM

So I have noticed that the fuel trims in my CTS are doing funny things. I have been watching the injector pulse width as well as fuel trims and it looks like the passenger side of the engine is using 5-10% more fuel than the drivers side.

Now this could be blamed on the timing chain as it has stretched over time, but I think it might be the O2 sensors. Does anybody have some experience with this or just want to give me a good excuse to buy new ones?

Thanks

01-25-2015, 10:15 AM	#1 (permalink)
ksa8907 Master EcoModder Join Date: May 2012 Location: Tampa, FL Posts: 1,745 Volt, gas only - '12 Chevrolet Volt Premium 90 day: 38.02 mpg (US) Volt, electric only - '12 Chevrolet Volt Premium 90 day: 132.26 mpg (US) Yukon Denali Hybrid - '12 GMC Yukon Denali Hybrid 90 day: 21.48 mpg (US) Thanks: 206 Thanked 420 Times in 302 Posts	How to test and when to replace Oxygen Sensors? So I have noticed that the fuel trims in my CTS are doing funny things. I have been watching the injector pulse width as well as fuel trims and it looks like the passenger side of the engine is using 5-10% more fuel than the drivers side. Now this could be blamed on the timing chain as it has stretched over time, but I think it might be the O2 sensors. Does anybody have some experience with this or just want to give me a good excuse to buy new ones? Thanks __________________