sniknah

My check engine light has been on for 3 days..I went to auto part store and used there code reader. It read 1135 Did a quick search and found out it means the following.. Air/fuel ratio sensor heater circuit malfunction bank one sensor 1. Could anyone please tell me what the heck this means? The car runs fine..also any ideas of what this would cost to fix? thank you!

steviej

iTrader: (1)

It means your Air Fuel sensor in the Bank 1 (row of three cylinders nearest the windshield) Sensor 1 (the sensor that screws into the exhaust pipe between the manifold and the catilytic converter) position is faulty. An air fuel sensor is the pre-cat version of an oxygen sensor. This is the hardest one to get to of the four sensors (2 AF and 2 O2) you have. Your car will most likely run adequately but what will happen is the cat will run hotter and suffer premature failure in the long run. You can pay $200 now and fix the immediate problem or pay a couple grand later and fix the problem that most likely will result.

If you got an O2 socket and a long arm, you can DIY.

steviej

hoonami

i had/having similar issue, mine was 0300,0301,0302,0303,0304,0305,0171,1130. and it is getting serviced at the dealer and they told me it was the air/fuel ratio sensor and it was replaced today when i talked to them. they said it is running good now, becuase mine was really rough and gas mileage was so poor(averaging 7mph...) total bill is around 425...(220ish+tax for the parts and 1.5 hours of labor @$130/hr and FREE WASH and FREE BRAND NEW ES350 as a loaner) and it is getting it done at local lexus dealer

hoonami

yeah i know... but there were 2 sensors which i wasn't sure on and almost order wrong part, and didn't know if there were more problems or not so it was worth it in my case....