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sperry · 2009-08-10, 10:33 AM

Looks like I've got a fouled front O2 sensor on my WRX (ECU sees intermittent data coming from it... works for a minute or two, then sticks reading at 14.7 while the wideband shows the car go rich), and the generic Bosch replacement I picked up from Kragen throws a P0031 code.

Does anyone have a OEM O2 sensor I can borrow/buy to try to get my stock ECU up and running for smog? I don't need the sensor normally because the Hydra only runs the wideband (which is why my OEM sensor fouled... it was in the headers w/o being powered), but in order to pass smog I need to tune my stock ECU for blow-thru MAF use, and I need at least the front 02 sensor working for closed loop to keep the AFRs stoich.

2009-08-10, 10:33 AM	#1
sperry The Doink Real Name: Scott Join Date: Nov 2002 Location: Portland, OR Posts: 20,335 Car: '09 OBXT, '02 WRX, '96 Miata Class: PDX/TT-6 The way out is through	WTB/B: '02 WRX front Oxygen Sensor Looks like I've got a fouled front O2 sensor on my WRX (ECU sees intermittent data coming from it... works for a minute or two, then sticks reading at 14.7 while the wideband shows the car go rich), and the generic Bosch replacement I picked up from Kragen throws a P0031 code. Does anyone have a OEM O2 sensor I can borrow/buy to try to get my stock ECU up and running for smog? I don't need the sensor normally because the Hydra only runs the wideband (which is why my OEM sensor fouled... it was in the headers w/o being powered), but in order to pass smog I need to tune my stock ECU for blow-thru MAF use, and I need at least the front 02 sensor working for closed loop to keep the AFRs stoich. __________________ Is you is, or is you ain't, my con-stit-u-ints?