A stretched cam chain, resulting from infrequent oil changes, can cause the MIL to come on
with DTC P0341. Old oil causes the cam chain
to wear quickly. You can check for a damaged or stretched cam chain by measuring the cam chain autotensioner rod length. If it's more than 13.5 mm, you've got a bad cam chain and will need to replace it
along with the cam chain auto-tensioner.