Toyota Nation Forum banner

5FSE A/F Sensor Heater Circuit 1999

805 Views 1 Reply 2 Participants Last post by  kmr16442
Note to all:

Car may throw A/F Sensor Heater Circuit in california models due to faulty battery. If voltage drops toward 8V when the car is starting sometimes this code will get thrown (1135). The battery still tested good with a load tester.

When the battery was replaced the problem went away. This is of course after changing:

1) The sensor.
2) The ECU.
3) The battery.
1 - 2 of 2 Posts
X2 on that! My battery was going and I got the same code. I was surprised how long the dying battery lasted and still started my car. Once I got a new battery no more codes and wow how fast the starter turned the car over.
1 - 2 of 2 Posts
This is an older thread, you may not receive a response, and could be reviving an old thread. Please consider creating a new thread.