P0157 code - B2S2 oxygen sensor

[kmarrocco]

Hello, I have a 2017 Explorer sport with a 3.5L ecoboost engine. The check engine light came on intermittently and the code is P0157. I understand this could be the bank 2 sensor 2 oxygen sensor. However, I am a bit confused with how that equates to the terminology they use at the dealership parts department. I went in and asked for bank 2 sensor 2 and they seem to describe them as right/left and upper/lower. Does anyone know the proper part number for B2S2? I have ordered BA5Z-9G444-A with the dealership, but I don't want to start the repair and then find out it is the wrong sensor. Any help would be greatly appreciated. Thanks!

 

[ProjectSHO89]

Right= B1 = Radiator side, Left = B2=Firewall side

Corrected: Right= B1 = Firewall side, Left = B2=Radiator side

S1=upstream, S2=downstream

 

[kmarrocco]

Right= B1 = Radiator side, Left = B2=Firewall side
S1=upstream, S2=downstream

Thanks for the reply. I have googled the part number I have ordered and it looks like it has a grey connector. I believe it is downstream but it is described as right and left because it is used in multiple applications. I found these 2 videos and the correct part appears to have a black connector.





Does anyone have the correct O2 sensor part number for P0157 in a 2017 Ford Explorer Sport 3.5L?

 

[ProjectSHO89]

No worries, you have already ordered the correct part number.

2011-2019 Ford Oxygen Sensor BA5Z-9G444-A | TascaParts.com

2011-2019 Ford part # BA5Z-9G444-A - Oxygen Sensor

www.tascaparts.com

 

[kmarrocco]

No worries, you have already ordered the correct part number.

2011-2019 Ford Oxygen Sensor BA5Z-9G444-A | TascaParts.com

2011-2019 Ford part # BA5Z-9G444-A - Oxygen Sensor

www.tascaparts.com

Are you sure that it is not supposed to be part number BH6Z-9G444-A?

 

[ProjectSHO89]

Crap! I reversed the descriptions last evening for B1/B2. I edited the previous post... That oversight also caused me to look at the wrong part number...

Yes, the BH6Z-9G444-A would be the correct part number for the B2S2. The only difference in the two downstream sensors will be the length of the harness. Don't have the specifics on that. The longer harness can be used on the "short side", you'll just have to secure the extra length of the harness.

 

[peterk9]

Original 2011-2019 Ford Oxygen Sensor BA5Z-9G444-A | Levittown Ford Parts

2011-2019 Ford part # BA5Z-9G444-A - Oxygen Sensor

parts.levittownfordparts.com

Hello, I have a 2017 Explorer sport with a 3.5L ecoboost engine. The check engine light came on intermittently and the code is P0157. I understand this could be the bank 2 sensor 2 oxygen sensor. However, I am a bit confused with how that equates to the terminology they use at the dealership parts department. I went in and asked for bank 2 sensor 2 and they seem to describe them as right/left and upper/lower. Does anyone know the proper part number for B2S2? I have ordered BA5Z-9G444-A with the dealership, but I don't want to start the repair and then find out it is the wrong sensor. Any help would be greatly appreciated. Thanks!

Welcome to the Forum.
The dealership is the most expensive place to parts from. Check the Tasca price against the dealer price. Also, Levittown Ford, a forum vendor, offers members a discount on parts. In this case, they do seem to be a little higher than Tasca.

Original 2011-2019 Ford Oxygen Sensor BH6Z-9G444-A | Levittown Ford Parts

2011-2019 Ford part # BH6Z-9G444-A - Oxygen Sensor

parts.levittownfordparts.com

Good luck and please let us know how things went.

Peter