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Im working on a 2007 Toyota Avalon 3.5l. It set a code P0025 Camshaft Position B, Timing Over Retarded (Bank 2). First time code set, the VVT solenoid for that camshaft was replaced, seemed fine after that but code returned shortly after. Second time it came for that code it also had misfire codes for bank 2. It was also noticed that the oil feed line that goes to that camshaft was leaking, turned out the previous tech did valve cover gaskets and cross threaded the banjo bolt on the valve cover, the valve cover was replaced with an aftermarket part and the oil was changed because it was very dirty. During valve cover replacement the oil port seals were inspected and they were new and the OCV filter in the valve cover was not clogged, the ocv was also replaced. Now the code sets immediately after starting the engine, live data is no help because everything defaults to 0s when the code sets, i pulled the valve cover again to inspect the timing and found that it was perfectlyin time, when turning the engine by hand the phaser does not skip or make noise, is there any other tests i can perform or possibly anything else i may be missing? Also, engine does have a phaser rattle at cold start up, any suggestions are appreciated.
Last edit: 2 weeks 6 days ago by Teranluis1991. Reason: Wrong information
Considering the cold start rattle and persistent timing codes, I strongly suspect this will need a cam phaser/timing chain set at minimum.
There is a TSB that sounds like it would apply to this car that recommends replacing the phaser, camshaft and camshaft housing sub assembly! That sounds pretty labor intensive for a vehicle of that age.
T-SB-0094-09
