I have a 2002 lexus ES300 , I changed the timing belt, I drove the car for three days. Check engine light came on. I thought I put the timing belt on wrong and did it again.Then the check engine light came on. The trouble code came up P1436. I had a mechanic check on that code and he tells me its a variable timing sensor. I pulled that sensor out and put it back in with out unplugging the battery cable. That check engine light went off. I drove 600 miles. The light came back on and the same code came up again P1436. Should I change that sensor? Also, how can you check if that sensor is bad?


Luis