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Discussion Starter · #1 ·
Hi,
I have a 2015 Outback 3.6R Limited CVT. I also have a repair bill of $3,700.

My car is showing a P0174 code and I was told there are multiple oil leaks (Upper and Lower oil pans and front seal between transmission and engine. Maybe more, that's all the mechanic noted) and that my bank 2 oxygen sensor is cover in oil. They want to replace the sensor and do a reseal on the engine.

My check engine light comes on for a few days, then goes off for a day or so.

Do I risk just having the sensor replaced not knowing if oil will again ruin it or do I need to do the full repair they suggest?

Thanks for any help you can give.
 

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O2 sensor may get contaminated if oil is being BURNED within the engine.
...not sure O2 sensor would be affected by oil leaking on outside of it.

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As for the $3,700 bill (estimate, i hope).... beak it down by priority/cost and work thru it over several months.
Some oil-leaks may simply be ignored.... checking/adding oil weekly is FARRR cheeper than cost of repairs. 馃榿
 

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Discussion Starter · #3 ·
O2 sensor may get contaminated if oil is being BURNED within the engine.
...not sure O2 sensor would be affected by oil leaking on outside of it.

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As for the $3,700 bill.... beak it down by priority/cost and work thru it over several months.
Some oil-leaks may simply be ignored.... checking/adding oil weekly is FARRR cheeper than cost of repairs. 馃榿
Thanks. The sensor replacement alone is close to $600. I mostly don't want to do something that will cause damage and problems down the road.
 

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Clean engine & monitor leak to verify source. You might need a mechanic's mirror & small flashlight. You can shine light directly on mirror and bounce to the area you want to look at in tight spaces. Ultimate would be a scope with camera. Oil leak could be coming from top rear area of engine, such as pressure sending unit & running down engine/trans making it look like a rear main or trans input shaft seal leak. Oil on O2 sensor can impede either its ability to sample exhaust gases or generate proper voltage signals
 

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Discussion Starter · #5 ·
Clean engine & monitor leak to verify source. You might need a mechanic's mirror & small flashlight. You can shine light directly on mirror and bounce to the area you want to look at in tight spaces. Ultimate would be a scope with camera. Oil leak could be coming from top rear area of engine, such as pressure sending unit & running down engine/trans making it look like a rear main or trans input shaft seal leak. Oil on O2 sensor can impede either its ability to sample exhaust gases or generate proper voltage signals
Problem is I'm a female who is totally inept at all things CAR. Maybe I can get someone to do this for me. How long is it safe to drive as is? Several days?

Thanks for your help :)
 

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Are you near any of these recommended shops?

 

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Discussion Starter · #7 ·

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if you know little about cars then I suggest you also get a second opinion on what needs to be repaired. I believe you can drive it for several days if not months. Keep an eye on the oil level knowing you are leaking. That will also help gauge how bad the leaks are. What is the mileage on the car?
 

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You may know little about your car, but you鈥檝e come to the right place for advice.

I would second the second opinion comments. I would never spend that kind of money on anything before being sure. Their has to be another dealer (if you went to one) or independent shop nearby. If you don鈥檛 have anyone you can ask for a recommendation, Google reviews are a decent secondary way to gauge if a shop is decent.

You can even show them the post regarding oil leaking from the top making it hard to see what鈥檚 leaking below it, to show you鈥檙e taking a vested interest and doing the research, and not just accepting what they say on face value.

As also mentioned, oil is a whole lot less expensive. Learn how to check it and add some as needed until you figure out a plan. It鈥檚 easy to do. And you can always ask more questions here.
 

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Discussion Starter · #13 ·
You may know little about your car, but you鈥檝e come to the right place for advice.

I would second the second opinion comments. I would never spend that kind of money on anything before being sure. Their has to be another dealer (if you went to one) or independent shop nearby. If you don鈥檛 have anyone you can ask for a recommendation, Google reviews are a decent secondary way to gauge if a shop is decent.

You can even show them the post regarding oil leaking from the top making it hard to see what鈥檚 leaking below it, to show you鈥檙e taking a vested interest and doing the research, and not just accepting what they say on face value.

As also mentioned, oil is a whole lot less expensive. Learn how to check it and add some as needed until you figure out a plan. It鈥檚 easy to do. And you can always ask more questions here.
Thank you. I at least knew enough to look for a good forum for help! I'll research a local shop to get a second opinion. Appreciate yours!
 

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Another vote to identify a trustworthy independent mechanic to have your oxygen sensor replaced & otherwise just clean your oil leaks, check & top-off your oil a little more frequently, & monitor closely for signs of fresh leaks.

Full retail from Subaru for that oxygen sensor is $193 & a shop will get it for less than that. Replacement looks straightforward (pretty easy access with no major parts to move out of the way) so unless I'm missing something ~ $400 for labor is outrageous.

If you luck out & find an independent Subaru specialist, they will know to install a Denso brand sensor (that's what Subaru installs or you can purchase that brand from parts suppliers) but a good general mechanic may not know that other brands tend to function poorly on our cars.
 

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Problem is I'm a female who is totally inept at all things CAR.
Being female is no excuse to not learn some things under the hood of your car. Certainly, you should know how to check ALL the underhood fluids. Keeping oil and antifreeze at proper level can mean the difference between keeping your car for years -vs- having it towed away as scrap.

Sadly, many shops try to take advantage of female customers. Your only recourse is knowledge. We can help you with that here in these forums.

It sounds to me as if you need to find a TRUSTED local shop. If you find one, feel free to update our list of trusted Subaru shops so others can follow.
 

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Discussion Starter · #16 ·
Another vote to identify a trustworthy independent mechanic to have your oxygen sensor replaced & otherwise just clean your oil leaks, check & top-off your oil a little more frequently, & monitor closely for signs of fresh leaks.

Full retail from Subaru for that oxygen sensor is $193 & a shop will get it for less than that. Replacement looks straightforward (pretty easy access with no major parts to move out of the way) so unless I'm missing something ~ $400 for labor is outrageous.

If you luck out & find an independent Subaru specialist, they will know to install a Denso brand sensor (that's what Subaru installs or you can purchase that brand from parts suppliers) but a good general mechanic may not know that other brands tend to function poorly on our cars.
Thanks.
Good to know what a reasonable price would look like and the best brand to buy.
 

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Discussion Starter · #17 ·
Being female is no excuse to not learn some things under the hood of your car. Certainly, you should know how to check ALL the underhood fluids. Keeping oil and antifreeze at proper level can mean the difference between keeping your car for years -vs- having it towed away as scrap.

Sadly, many shops try to take advantage of female customers. Your only recourse is knowledge. We can help you with that here in these forums.

It sounds to me as if you need to find a TRUSTED local shop. If you find one, feel free to update our list of trusted Subaru shops so others can follow.
Thanks! I do know how to check oil and washer fluid (never checked antifreeze!) I recently bought and changed my air filter after watching a video ( I was stupid proud, like I'd scaled a mountain or something). I take my car for oil changes regularly and they (are supposed to) check fluids etc.
Other than that I'm pretty useless with cars.
I will look for a subaru shop and check their reviews.
Thanks again.
 

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Discussion Starter · #19 ·

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How long is it safe to drive as is?
Not sure if I'd replace the sensor or not just yet. I've no idea how bad the oil leak is but if it's bad enough it will only foul a new sensor if you don't take care of the leak. Keep an eye on the oil level if you continue to drive it while you look for another opinion and estimate - as long as the O2 issue doesn't cause drive-ability issues. I don't think I'd be going on any long trips given the current situation. Maybe look for some youtube vids to see if you can handle cleaning the engine.
I also have a repair bill of $3,700.
By that I presume you meant 'estimate'?
 
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