P0171 P1130 P1135 CEL Suggestions?

[avalonshoe]

I recently had 3 codes that came on at once, but I barely have time to work on the car. As a graduate student, I think I am too broke to have someone else fix it...

Could i just clean out the MAF Sensor first? do u think that a dirty sensor caused the other two? or perhaps my O2 is dying? My car sputters sometimes on idle, I feel the car shaking on and off while idling. ..

P0171 - System too Lean - Bank 1
P1130 - A/F Sensor Circuit Range/Performance Malfunction (Bank 1, Sensor 1)
P1135 - A/F Sensor Heater Circuit Malfunction (Bank 1, Sensor 1)

[kegunder]

Clean your Throttle body and PCV. Ignore the 1130 and 1135 codes until you can afford a new A-F sensor. But keep checking your codes and doing routine fluid changes in the meantime.

[daveoman]

Definitely clean the MAF sensor...that screwed me up for months.

[avalonshoe]

I usually check the MAF sensor about every 10k miles, and if its dirty enough then ill clean it. I dont do the excessive cleaning, but I definitely cleaned the MAF sensor this time around.

Throttle body was taken out and cleaned around 120K miles. The idle motor was cleaned at the same time. I had chunks of carbon that came out.

Kegunder, i wasnt sure what u mean by cleaning the PCV, do u mean the valve? or the hose? i think there's a pcv hose?

• I wanted to know if it could be the A/F sensor relay? I didnt have time to check the voltages through the ECM yet. That should be accurate right?

• lets say if something is wrong with the voltages supplying the A/F sensor, then it could render the sensor to malfunction?

• The A/F sensor used to be called the O2 sensor in archaic terms?

• Is it the same part number for Bank 1 and 2 A/F sensor? I want to take an A/F sensor from Bank 2 from another avalon that was wrecked and put it into bank 1 on my car. That avalon only had 30K miles on it. However, I want try this first rather than spending $$$ on a new part and find out that this is an electrical problem causing the malfunction.
• Are there any special instructions to change the A/F sensor? Gaskets, seals, etc? i couldnt find it the manual on it....

thanks for the previous replies, guys!..

[csaxon]

The key to your problem is the P1135. It kicks in within a second of starting your car. Replace b1s1.
The Toyota part numbers for b1s1 and b2s1 are different (for inventory data base), but they are the same sensor. They are interchangeable.
DENSO Part # 234-9021 is the part you want. Unscrew old and insert new.
Wire Length 13.78; # of Wires 4; DENSO is the O.E. Manufacturer / Air Fuel Ratio Sensor; Front. It's $136 at rockauto.com. if you use the code 106E7A48FA1A , you'll save another 5%. Other sites may have it for less. It's usually more expensive at parts places but check around.

[avalonshoe]

Originally Posted by csaxon

The key to your problem is the P1135. It kicks in within a second of starting your car. Replace b1s1.
The Toyota part numbers for b1s1 and b2s1 are different (for inventory data base), but they are the same sensor. They are interchangeable.
DENSO Part # 234-9021 is the part you want. Unscrew old and insert new.
Wire Length 13.78; # of Wires 4; DENSO is the O.E. Manufacturer / Air Fuel Ratio Sensor; Front. It's $136 at rockauto.com. if you use the code 106E7A48FA1A , you'll save another 5%. Other sites may have it for less. It's usually more expensive at parts places but check around.

Hey there,

Forgot to mention that I have a 2000 Avalon, I find different part numbers,

W0133-1601176

and 234-9021

are both for avalons?

[csaxon]

Engine: V6 (3.0L)
ID: 1MZFE 234-9021 DENSO is the O.E. Manufacturer / Air Fuel Ratio Sensor Front

Get the first time fit for a perfect fit.

[Riick]

Oxygen sensors = Air Fuel Ratio Sensors
Tend not to go out on Toyota's until 100k or better.
You could also buy more generic-part and tie into the OEM Toyota electrical fitting.
Will work just as well from what I understand, Just remember NOT to solder the connection
.

[avalonshoe]

Get the first time fit for a perfect fit. I finally get what that meant.
I replaced the B1S1 A/F sensor; everything is back to normal now.

[csaxon]

Great! Glad to help.

[avalonshoe]

huge thanks to you!