timing chain tensioner

[FREE100KSECRET]

Thanks, I didn't realize until I pulled old one out that the spring action is only important upon start up and then oil pressure takes over. So that would explain the brief knocking only once in a while when starting and then noise would vanish. So given that, do these fail to pump up due to no oil pressure in unit. Enough so that there is no noise, but throws all those codes for that bank, misfire, fuel shut off along with the PO0011 code.

It would reason based on the noise people mention even after running and warming up. So wouldn't it always be noisy if it was a unit failure issue with oil pressure not building up properly. Just trying to understand if units which do not build up oil pressure are sometimes quiet while they still throw codes.