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Impreza Oxygen sensor problem

7 messages,  Last post on Jan 04, 2008 at 12:10 PM

You are in the Subaru Impreza Maintenance & Repair Forum.

What is this discussion about? Subaru Impreza

Messages Page 2 of 2

#3 of 7 Re: Impreza Oxygen sensor problem [ateixeira] by paisan

Jan 04, 2008 (8:17 am)

Replying to: ateixeira (Jan 04, 2008 7:56 am)
It could be the wrong Bosh sensor, but more than likely it may be a bad wire from the ecu to the sensor or perhaps a bad ecu. Unfortunately it could be anything at this point.
 
-mike

#4 of 7 Re: Impreza Oxygen sensor problem [ateixeira] by wingman54

Jan 04, 2008 (9:35 am)

Replying to: ateixeira (Jan 04, 2008 7:56 am)
Yeah, I know Subaru will want to replace the oxygen sensor with OEM part which is what I am trying to avoid. I'm kinda screwed if I have to take it back to the dealer. The other shop thinks it is the ecu and says I need to go to the dealer for that.

#5 of 7 Re: Impreza Oxygen sensor problem [paisan] by wingman54

Jan 04, 2008 (9:52 am)

Replying to: paisan (Jan 04, 2008 8:17 am)
Thanks for the suggestions! I had been thinking that the new sensor could either be the wrong one or simply defective out of the box. Good suggestion on checking the wire from the ecu to the sensor. I will ask the shop to check that out. I am also going to call subaru to get the part number for the oem sensor and cross reference that with bosch to make sure they installed the right part. If none of that helps I was thinking of checking on availability of a rebuilt ECU from this company: http://www.ecm-ecu-online.com/
Does that sound like a good plan of action?
Thank you so much for your help!

#6 of 7 Re: Impreza Oxygen sensor problem [wingman54] by paisan

Jan 04, 2008 (9:55 am)

Replying to: wingman54 (Jan 04, 2008 9:52 am)
or a junkyard ecu could be put in easily. The replacement is relatively simple IIRC.
 
-mike

#7 of 7 Update by wingman54

Jan 04, 2008 (12:10 pm)

I checked with car quest and confirmed that the correct oxygen sensor was used. They said that it was actually made by Denso and is oem. Also, the mechanic confirmed that he had already checked the resistance on the wires from the O2 sensor to the ECM. It appears to me that the problem is in fact the ECM. The ECM is $500 from Subaru. A rebuilt one was not any cheaper unless I send mine in to have it rebuilt, so I think I am going to have to go back to a Subaru dealer. The car was purchased in November 2000 and has 55000 miles so it would be just past it's 7 year/70,000 warranty period. I am going to try and see if Subaru will cover it anyway.

Messages Page 2 of 2

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