Hi all,
Just recently we had CEL came on and the codes were

P1130
A/F Sense
Circuit Range
Performance
malfunction (Bank1 sensor1)

P1135
A/F Sense
Circuit Heater
malfunction (Bank1 sensor1)


This CEL came about 3 days after our first CEL, which were P0440,P0441,P0446.
When first CEL came on, we changed our gas cap from advanced autoparts and the CEL seemed to be gone.
But this time, it is back with two of the codes above.

Is this something I should be really concerned about??

Could have this been caused by replacing gas cap that is not made by Lexus nor toyota?? (cuz we got a gas cap at Advanced Autoparts for $7.00)

Also, we have another problem with SRS light being on.
It does not happen all the time, but it is on when we start the car up and weather is cold. My bodyshop was able to detect the code

B0122
Seat Belt
Buckle Switch (RH)

B0127
Seat Belt
Buckle Switch (LH)

B1100
Airbag Sensor Assembly


What do you think I can do for all these CEL as well as SRS lights??
Thanks for advice guyz!!!!

 

I don't know offhand about the latter codes (those I will have to check for you tonight) and I think that is the first time we have seen them in this forum.

The P1130 and P1135 codes relate to an A/F (Air/Fuel) Sensor located behind the engine. This problem should not be related to the gas cap. Such sensors can have issues after many miles and need replacement.

I don't know offhand where the best place might be in the U.S. to get this type of sensor, but some of the other forum members can you give their opinions.

The sensor in question is the one below with the black wire coming out of it.

I promise I will check those other codes for you out tonight, but this morning and this afternoon are going to be a bit difficult for me.

 

B0122
Seat Belt
Buckle Switch (RH)

B0127
Seat Belt
Buckle Switch (LH)

B1100
Airbag Sensor Assembly

However, after spending some quality time with volume 1 of the manual, I noted something that stated "if a code not listed on the chart (which I have in my book) is displayed, then the airbag sensor assembly is faulty.

The first two codes are not listed in the book. Closest thing would be something to the seatbelt pretensioner.

The airbag sensor assembly is located behind and just below where the gear shifter would be. If you think of where your right foot would be on the accelerator it would be just behind the area to the right of that requiring removal to get at it.

 

Thanks for the info LEX.
I was able to get the AF sensor replaced and hopefully that will do it as far as CEL goes.
For the airbag lights, it always seems to happen when the weather is cold or when we first start the car in mornings. I guess I'll just keep my eyes on it more and see what happens.

But as always, thanks for your help!!!

 

@lexmex, I know this is an old post.

I have the B1100 code and am having an impossible time finding out how to do the install or access this part.

I know that it is some type of assembly and I have a general idea of where it is, but I want to see if this is a simple fix, ie. disconnected ground, corrosion. Or if I will have to order in this part and replace it myself.

Thanks in advance!