Over the weekend I removed the front timing chain cover to fix the oil leek at the cover and after reassembly the leak is gone but I am showing two codes.1) cam positioning Circuit off 2) cam advance timing off. What did I do wrong? what can I do to resolve the problem?

2004 F150 FX4 4x4 Mark LT 5.4 automatic

 

Was your battery disconnected? I'd say just reset the codes and see if it comes back, but that's just what I personally would do. I'm sure there are others with a lot better advice on it...

 

Yes the battery was disconnected

 

Ok so here is where i stand I cleared the codes and after a quik drive I shut her off and restarted the truck. The check engine light came back on so I went to Pep Boys to have them read the codes. I was told the codes that came up were PO 020 Cam positioning circuit and PO 021 Cam advance timing off. I replaced both the Cam sencers and the light came back on. Is there anyone here who can shed some light in the problem?

 

Check timing