toyota tacoma 2002 v6code p 1135

Question

what part i need to repair and part #

Answer 1

P1135 A/F sensor  heater circuit malfunction Bank 1 Sensor 1

The best way to approach this code condition is to test the A/F heater circuit. If the voltage for the heater circuit is present you go ahead and replace the A/F sensor for Bank 1 Sensor 1 which is the upstream sensor