Does anyone out there have experience with the following engine codes?

1346, 1349, 1351, 1354, 1656, 1663.

The codes are for a 99 GS400.

thanks!

 

P1346 VVT Sensor Rang/Performance Problem (Bank 1)
P1349 VVT System Malfunction (Bank 1)
P1351 VVT Sensor Range/Performance Problem (Bank 2)
P1354 VVT System Malfunction (Bank 2
P1656 OCV Circuit Malfunction (Bank 1)
P1663 OCV Circuit Malfunction (Bank 2)

for 1351.. according to the factory manual the ONLY problem could be the timing belt position on the camshaft or the belt itself.
1349 is ususally a blocked oil control valve on the 300s, dont know if that applies here.

 

Also found...
"DTC P1349 and P1354 are also output after the foreign object
is caught in some part of the system in the engine oil and the
system returns to normal in a short time. As ECM controls so
that foreign objects are ejected, there is no problem about VVT.
There is also no problem since the oil filter should get the foreign
object in the engine oil."

 

Thanks,

After doing some research it looks as though they are all interrelated. The blocked oil control valve is directed into the camshaft area which may signal an incorrect position of the time belt...that is my conclusion anyway. But the red flag for me is that it is messing with the timing belt and that is definitely something I need to get looked at today!

thanks, for your experience on this!