2016 FPIU P0036 and P0056

[dwu048]

Hi everyone!

I had the 19M01 CSP done on my vehicle in August of this year. Before that, I had the check engine light for all 4 O2 sensors which prompted me to replace them all. I also had the P0420 that occurred with the O2 sensors, which I didn't know was covered under the CSP. The catalytic converter was replaced and since August, I had no issue till this morning when I had the check engine light for both P0036 and P0056. Would the two errors be related to the CSP that was fixed in August? Am I looking at a brand-new issue?

Thanks, everyone!

 

[peterk9]

ford p0036 fault code - Google Search

ford p0056 fault code - Google Search

Looks like it could be a connect to the CSP.

Peter

 

[dwu048]

Thank you Peter! I was wondering if it was related or not. Didn't want to bring it in if it was a separate issue.

 

[dwu048]

Turns out the used car dealership that I bought my car replaced the two downstream sensors with aftermarket one. The Ford dealership checked the resistance for both and was not up to spec. Replaced with Ford and it seems fine.