Lexus Troubleshooting Questions? Ask a Lexus Expert
Do you have the specific code numbers that are set in the vehicle as of this morning causing the check engine light to come on? Can you take nearby AutoZone or similar parts store where most states except California and Virginia they do free malfunction code reads? Can you post all the specific code numbers here? Was the light on prior to the tbelt repair?
This P0016 code means there is a correlation or timing problem between the camshaft and the crankshaft. 99.9% of the time this means the camshafts are not correctly timed to the crankshaft. Specifically this code means that bank one which is the back bank by the firewall is out of time. The timing belt has not been installed correctly on that back bank. That is usually the most common one because the timing mark is hard to see and sometimes the cam can move on that back bank when installing the timing belt over the gear and running it back around the front gear and down to the crankshaft. It would be extremely unlikely that there's anything wrong with the VV TI gears the crank sensor or cam sensor provided you didn't remove them while doing the timing belt for any reason or you did not remove the camshaft gears or the crankshaft gear