Error Code P1155

[Snyrav4]

Error Code P1155
Definition:
Air/Fuel sensor heater circuit (Bank 1, Sensor 2)
Possible cause:
- Open or short circuit condition.
- Poor electrical connection.

I re-set the ECU / CE light, but it immediately comes back on after re-start.
I notice no performance, gas mileage or other issues.

Where exactly would I locate this sensor?
I assume this is not one of the oxygen sensors.

Thanks

[arries289]

See this post on another forum. Apparently it is the 02 sensor but is known as a wide band 02 sensor.

http://www.toyotanation.com/forum/sh...d.php?t=301142

good luck

[ScottinSoCal]

Originally Posted by Snyrav4

Error Code P1155
Definition:
Air/Fuel sensor heater circuit (Bank 1, Sensor 2)
Possible cause:
- Open or short circuit condition.
- Poor electrical connection.

I re-set the ECU / CE light, but it immediately comes back on after re-start.
I notice no performance, gas mileage or other issues.

Where exactly would I locate this sensor?
I assume this is not one of the oxygen sensors.

The O2 sensors used in this engine have heaters built into them, so they get up to operating temperature faster and more reliably. Yours is bad, and the only solution is to replace the sensor.

I just had this on my car, and within two weeks of replacing it the bank 2 sensor went. Fortunately, the auto parts place had ordered both, and hadn't yet returned the one I didn't buy immediately. Maybe they knew my other one would be going?

About $100 each, and not more than 20 minutes to replace in my driveway, but I have an O2 sensor socket and ratchet set. If you're not a wrench-it-yourself type, you're probably looking at about $250 for each sensor, installed. You can buy generic sensors for less than the OEM replacement, but I don't recommend it. You have to cut & splice wires, which leaves you with an additional failure point, in a pretty harsh and unforgiving environment (your engine compartment).