3rd Gen front O2 or A/F sensor registry

[notrayray]

Did you replace your front O2 or A/F sensor?

Please include the following....

1. year and engine
2. mileage
3. O2 or A/F sensor?
4. any recorded mpg difference?
5. was the check engine light on at the time? did it go out?
6. what was the code?

Thanks in advance

 

[Supra725]

99 cali spec 4runner.

1. 1999, 3.4 Liter.
2. 226k
3. Air Fuel Ratio Sensor. Part # 234-9002
4. Noticeable of mileage increase.
5. the check engine light was on and it went away after changing the front and back out with new Denso ones.
6. Codes : P1130, P1130(PD) , P1133, P1133(PD) and P1135..

hope the following thread help..

http://www.toyota-4runner.org/3rd-gen-t4rs/70301-cel.html

 

[coinball]

1. 2002 5VZFE
2. ~130k
3. A/F
4. Nothing noticeable
5. No - preventive maintenance during TRD header install
6. N/A

 

[BTO]

1999 California 3.4
~140k miles
A/F sensor
Unknown mpg improvement
CEL was on, fixed with AFS replacement
P0125, P1133, P1135

 

[TheDurk]

1999 California 3.4
~140k miles
Rear A/F sensor
Unknown mpg improvement
CEL was on, fixed with AFS replacement
P0125, P1133, P1135

Just an FYI, all rear sensors are O2 sensors. A/F's were only used in front. Those codes are also more likely associated with the front sensor.

 

[TheDurk]

1. '99 Cali. V6 3.4
2. 86K
3. A/F sensor (Denso 234-9002)
4. Not that I noticed, wasn't on long.
5. was the check engine light on at the time? Yes. did it go out? Yes.
6. what was the code? P0125, P1135

 

[BTO]

Just an FYI, all rear sensors are O2 sensors. A/F's were only used in front. Those codes are also more likely associated with the front sensor.

My mistake. I corrected it. It was the air/fuel sensor.

 

[notrayray]

Bump for tomorrow....
Hoping to get a good sense of when these suckers like to fail.
Thanks.

 

[Lyle Beach]

1. 2001 3.4 V6
2. 177,000
3. A/F sensor
4. none noticed, replaced right away though with DENSO from Toyota Dealership
5. Check engine was on, as well as the VSC OFF and TRAC OFF.
6. P1135
7. Codes and CEL cleared once replaced.