What is a P1349-VT Code versus a P0300 -Random code on 1999 Lexus ES300

My mechanic knew that there was a pending code of P0300 yet did other work of about $350.00 before fixing the original code? Would it have been easier and more cost effective to fix both Camshaft Solenoid at the same time then to do them serpartely?

Asked by for the 1999 Lexus ES300
1 answer
vt is valve timing and its poss causing a random misfire. is your oil full and clean?