P1349 Code - What To Try Next

[CT_11_Blue_HB]

First, thanks to all the forum members for all the info they share. I've been a registered lurker for a few years and have learned a lot from all the great posts here.

Looking for some help on diagnosing and fixing P1349 Code.

Car is 2002 Echo with ~280,000 miles.

Recently got P1349. Checked oil and it was low. Took about half a quart to bring it up to mid point on dip stick range. Reset code.

About 1 week, ~ 250 miles later, P1349 again. Realized it was about 2500 miles since last oil change, changed oil, reset code.

About another week, another 100 miles, P1349 again.

Decided to try what I thought would be next easiest thing and replaced OCV and VVTi filter. Ended up breaking OCV in block, but was able to extract with a 7/16" tap. Reset code. A day later, ~50 miles, P1349 again.

In each case, CEL comes on at low engine RPM. Next time I reset code, I will capture and write down freeze frame data from code reader.

Trying to decide what the next step is before considering replacing the cam timing assembly (which seems like a PITA).

Any thoughts?

Since this is a daily driver, found a 2011 Gray HB Yaris with 48K miles that I pick up tomorrow - just in case Echo is on last legs. Will be a stablemate to current 2011 Blue HB Yaris.

Thanks for your ideas!