p0031 o2 sensor code after replacement sensor
 

This project car 2001 bugeye wrx I took over didn't have the front o2 sensor, or hole for it. I think they were different headers off a dif ference model. Anyway, pug one in and fitted it Just behind turbo as suggested.

The code went off, but after 15 mins of driving it is back on. Any ideas?

I currently have 6 codes.

4 tgvs, as havnt done the delete yet,
1 Iacv, which also only came up today
and this front bank o2 sensor.


Before today I had 5 codes, 4 tgvs and knock sensor. Replaced knock sensor today and now have these two on.. not having a good one with this car at mo

Is the sensor pre cats? Or are there no cats? Is it a genuine sensor? If all is good maybe the reading that much further along the exhaust don't match what the ECU is expecting?

You can't blame the car for throwing error codes when people have messed about with it and removed stuff.

Yea that's true. It pre cat sensor, and I've mounted it here as suggested. Apparently it can be done when decatting the up pipe with no issues.

http://i122.photobucket.com/albums/o...d/IMAG1314.jpg

It's not a genuine sensor I don't think was only 42 quid. Old that be the issue, are the genuine ones denso?

0031 is the heater circuit - check resistance across the 2 black terminals of the sensor, if you get something other than 1-2 ohms then the heater circuit is shagged.

Also you must use genuine denso sensor of the correct part number for a subaru .The ECU converts sensor voltage to o2 readings using a fixed scale. If the sensor is off the o2 readings will be off which is bad.

The other codes you can delete easy enough once you get your openport lead hooked up. Check with the breakers on here see if someone can find you a correct scooby sensor at decent money but expect to be in the 70-120 quid region.

As for distance from the engine to the sensor, this wouldn't affect the running of it, classics and some JDM cars have the o2 sensor behind the turbo, newage UK cars have them in the headers closer to the engine for better emissions that's all.

Cool cheers, gonna order a new correct t dnso sensor then, gutted I wasted money on a poorer quality part. Doh.

Yea once this is done, I'm booked in at subaru to get a non ecutek ecu coded to the car and then let the open port fun commence

good man, send me your rom/ECUid and some logs we'll hook you up :D

good stuff :D thanks again man