P1346 control system but (valve timing fail) is the error code. Toyota passo 2007 , 1.0 Cc

Question

Every now and then, engine light and od(blinking) lights on, it happens mostly when engine is cold - warm condition, never happened when engine is completely hot. Od light will be off in a hour or so and till then gear shifting takes long time and also vehicle drives in od mode. Once od light off, vehicle drives normally even engine light is on. After some time engine light will be off too.
I replaced the vvt sensor but not use. Please help