Check engine light and OBD codes

[code2e]

Originally Posted by jsa2000

No tuning modifications. I will do the following and hope for the best. I'll clean the MAF sensor, replace bank 1 sensor 2 o2 with a Motorcraft sensor, I'll also add seafoam to the fuel. I cannot identify any type of vacuum leak.

I will let tderonne reply about the single cat / "y" pipe setup. I have been unable to confirm. However, the parts listings I have checked only show one downstream O2 sensor and only one cat. Based on parts, it looks like you have 2 upstream O2 sensors and just one downstream.

I think your plan above is on the right track. The OEM sensor is made by Bosch. If a Bosch sensor is priced lower, you would get the same for less.

[tderonne]

Originally Posted by jsa2000

tderonne: I unfortunately don't have the MH here to get underneath it right now, it's in storage. Are you saying that there is only one downstream O2 sensor? Are both codes related to the same sensor?

Right. One downstream sensor, in/after the catalyst. Not extremely familiar with the newer F53's that have downstream sensor - mine doesn't. But there's definitely just one catalyst assembly. Might have multiple bricks in one can, but it's a single inlet/outlet setup.

[jsa2000]

Great!! Thanks for your help. Have a great day!!

[0rion]

Any exhaust leaks?

[jsa2000]

Not that I can identify. No sound of any. Are there any other methods to determine exhaust leaks?