Surprised to see almost nothing come up for this code here or elsewhere on the web, makes me think it is uncommon. It has been thrown a few days in a row on our MY08 MCS, tonight I pulled the connector on the pre cat sensor and gave the connectors a good cleaning in hopes that it's just a bad connection, seems odd that an O2 sensor would fail at ~45k miles.

Assuming it is bad are their any viable aftermarket alternatives? Looks like Pelican has a Bosch for $175, appears to be a LS17112.

P2414 - O2 Sensor Oxygen Sample Error (Bank 1 Sensor 1)
P2414 - Oxygen sensor before catalytic converter, installation: Sensor is not installed correctly in exhaust system

 

I had an an issue with this the other day the forums up there somewhere. Anyway yeah it's dead and needs to be replaced. Bosch makes one but after talking to Dt you can really only get them from the dealer for about 180. Which I just realized I paid 280 but that's my fault

 

It happened to me once, but it was fixed after cleaning the contacts. Another thing you could try, is to clean the sensor by submerging it in gasoline. Finally, I suggest you also check the condition of your battery. On my sister's Fiat 500 we have had a O2 Sensor Error whose cause was a bad battery.

If all else fails, then go for a new O2 sensor. Bosch is the OEM of these sensors.

 

Did you pull it out and clean it? It could be clogged from all of the oil residue passing through the exhaust. You wouldn't believe how fast that black oil residue clinging to my new Borla exhaust tips!

 

No I just cleaned the contacts on the connector and it fixed it... But I read elsewhere that you can also clean the O2 sensor itself if you dip it in gasoline. The sensor slowly wears out, so it may not be possible to revive it, but with just 45k on the clock that shouldn't be it. Normally these sensors last up to 120k+.

Keep in mind the CEL will not go away immediately if you do not remove the error with a scan tool. I think it requires 2-3 starts without the error present to stop showing the CEL.

 

I think those deposits are actually carbon; you get it from starting the engine with the mixture enriched by the ECU, and it's pretty much normal.

Cheers,

Spridget

 

Just had my 2012 MCS in with a check engine light. It was also difficult to start when warm. They said it was the oxygen sensor and there was a TSB on this problem. Seems to be running ok now.

 

Update: CEL comes back quickly even after cleaning connection contacts, today I put the sensor in some electrical contact cleaner as a last ditched effort. Will reset and drive tomorrow but I suspect I'll be buying a new sensor soon.

 

Just had mine replaced (warranty) at 7200 miles!! Sensor 1 Bank 1 Pre cat.

 

Replacement O2 sensor ordered, looks like LS17112 and 17112 are the same part. 17112 is used on some larger BMWs and MBs, so it is relatively easy to find. Rockauto sells it for a good price but is OOS, I found one on Ebay for $100 so we'll see how that goes.

 

Replacement part installed, CEL is gone, easy peasy. The wiring loom on the replacement part is not identical to the OEM part but I doubt anyone would notice if they weren't looking at both side by side.