Fuel Economy, Hypermiling, EcoModding News and Forum - EcoModder.com - View Single Post - VX code 48 on deceleration -> Replace LAF O2 sensor?

Carwhisperer · 11-04-2010, 11:46 AM

I have a turbo'd vx motor in an AWD obd0 chassis. 49 state P07, LAF. I get about 31 mpg when I drive half time at 80 mph and 35 or so if I stay around 62 mph (80 mile round trip commute, 4000ft elevation to sea level). I get code 48 and 12, I think the CEL is set more by 48 than 12. If I turn the key off and on the CEL goes off. When the CEL is set does the car go into open loop? Also, the CEL comes on most during deceleration. Is this likely a bad LAF sensor?

11-04-2010, 11:46 AM	#1 (permalink)
Carwhisperer EcoModding Lurker Join Date: Apr 2009 Location: Pollock Pines, CA 4000' Elevation Posts: 32 Thanks: 0 Thanked 1 Time in 1 Post	VX code 48 on deceleration -> Replace LAF O2 sensor? I have a turbo'd vx motor in an AWD obd0 chassis. 49 state P07, LAF. I get about 31 mpg when I drive half time at 80 mph and 35 or so if I stay around 62 mph (80 mile round trip commute, 4000ft elevation to sea level). I get code 48 and 12, I think the CEL is set more by 48 than 12. If I turn the key off and on the CEL goes off. When the CEL is set does the car go into open loop? Also, the CEL comes on most during deceleration. Is this likely a bad LAF sensor?