Rx300 1656 Fault Code

[kenclarke]

First must kick myself for selling my LS400 back in September best car I've ever owned. Anyhow I digress I'm wanting another Lexus but have decided to go for the RX300 as I have two German Sheperd's.

I've seen one I can buy with LPG conversion but it has an issue. It throwing up the 1656 ocv fault code and goes into limp mode. On top of this it won't start until a scanner is plugged. Could this be simply changing ocv valve or something far more sinister and I should keep well away from it

Thanks

[ColinBarber]

1656 is an open/short circuit meaning a wiring or OCV fault. In theory the ECU shouldn't get this type of error code wrong so it does point towards the valve being faulty.

If there was something else wrong, with the valve timing or VVT controller, then it shouldn't be able to produce this error, it would give a less precise 1349 malfunction error.

I'm still not sure I'd want to purchase a vehicle with a faulty VVTi system, just in case the valve has been disconnected to hide some other issue.