2000 LEXUS ES300
11,xxx MILES
so I have to take my car in for smog really soon. I have my check engine light on.
I had it read codes were
P1346
P1351
P301
P306

already changed o2 sensor and spark plugs light turned off.

drove for about 30 miles light came back on.

car has no idling problems no driving problems no power reductions I believe.

It might be one of the coils I'm thinking from reading what's on the forums, but how do I figure which one.

Please help me out thanks!

 

P1346---VVT Sensor/Camshaft Position Sensor Circuit Range/Performance Problem (Bank 1)
P1351---VVT Sensor/Camshaft Position Sensor Circuit Range/Performance Problem (Bank 2)

P0301, 306 are misfire codes for cyl 1 and 6 only.

I would check your Cam sensor first for it will trigger misfire codes.
Did you have a T-belt replaced recently?
A jumped timing would also trigger those codes.

 

ah sorry. I actually mistaken my codes I didnt get p301 nor p306. Just codes P1346, P1351 . And timing belt was changed about a year ago. I really need help with this. My mechanic says he doesn't know where to start in order to save the most money and time.