Lambse values when tuned

[Witj85]

Hopefully this is the right place. Info on car: SP catless longtubes and vmp tune. Car has been tuned since 1200 miles and ran great.

I was driving through a monsoon leaving work and got about 3 miles before car started running rough. Stopped at a gas station turned car off then restarted and it threw code p2251 for o2. I cleared it with tuner filled up with gas and drove home without issue. Question is what lambse supposed to read when cruising on an x4?

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[Witj85]

Also the afr Guage stays at 14.0 and doesn't move

 

[Witj85]

Threw code 2251 gonna replace bank1 sensor1 see if it changes.

 

[grabber yote]

9.6 to 10.0 for me tuned.

 

[Witj85]

I'm on 93 but the values on the x4 are different then standard afr readings.

 

[Nuked]

Lambda at cruise/idle should be 1.00

 

[stevnoof1]

your o2 sensor is done. get a new one.

 

[Witj85]

I am. Unfortunately nobody has one in stock around me so I gotta wait.

 

[Chach805]

Yup your o2 is definitely done.

 

[Witj85]

Welp replaced sensor, cleared code and car ran great. Parked for an hour started back up and now its throwing for bank 2 sensor 1. What are the chances of that?

 

[stevnoof1]

Running ethanol?

 

[Witj85]

No. 93 which has the standard 10% around here

 

[Witj85]

The afr gauge is working now and it's running fine just throw a code 2254 now

 

[Witj85]

Probably just replace the driver o2 and see what happens. Is it possible for water to mess them up? My parking lot at work had about 4" or so of water in it and it happened after leaving work. I know on stock manifolds they're higher up.

 

[GTBOB]

Try swapping it from one side to the other, and see if the code follows it.

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