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Discussion Starter · #1 ·
So I got a check engine light last week on my V70R. ODB reader gives the following (DST codes pulled from the sticky here):

P0131 - ECM-248D -- Front heated oxygen sensor, bank 1 -- Signal too low
P0037 - ECM-223D -- Rear heated oxygen sensor, bank 1 -- Signal too low
P0031 - ECM-244D -- Front heated oxygen sensor, bank 1 heating -- Signal too low
P0036 - ECM-223B -- Rear heated oxygen sensor, bank 1 -- Signal missing

Anyone familiar with these ? Wondering if this is DIY repair or best left to a shop.

thanks
 

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My guess would be that you have a leak somewhere between the engine-exhaust manifold-DP, but that's purely a guess. What year is the R and what modifications, if any, does it have?
 

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Discussion Starter · #3 ·
It's an 06. And downpipe to tailpipe has been modified. This was done a couple of years ago so nothing new in that regards.
 
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