Just threw these up a week after doing the intake manifold gaskets. Look to all be related to the left front O2 sensor, no?

 

Just found this thread from five years ago:

https://landroverforums.com/forum/di...s-found-28573/

Does everyone concur?

 

I had similar codes after a head gasket job. I had a failed sai solenoid so vacuum was always present at the valves. Exhaust was always flowing back into the sai pump after it shut off so it was loud and had codes. I also had a vacuum leak where the brake booster line connected to the upper manifold which threw codes for the drivers side too.

 

I just repaired those codes.

Replaced my O2 sensors and still got codes. Had someone run the Tbook on it and the SAI was failing a check.

My SAI pump, t-hose and check valves were full of water.

Replaced the SAI pump with a remanufactured on with a 2 year warranty, blew out the lines and replaced the check valves.

Also replaced the two front O2 sensors because they looked pretty bad and I had ordered them anyway.

 

Cleared the codes and went a day before throwing them again, but this time was only PO130 and PO171.

Could this be leak(s) in the vacuum lines, as I removed and reinstalled all of these during the intake manifold job?