3rz prerunner code 0171 1130 1135

02 pre runner 4cyl auto 300k miles
got code 0171 1130 1135
Happened about 8 month ago and i changed the bank 1 sensor 1 oxigen sensor,clean the maf sensor and reset the light,after few minutes light comes back and on and never bother with it till today the gas mileage decreasing like crazy and i can smell unburn gas on exhaust

Is there any chance that maf sensor faulty?I dont want to throw another $200 for sensor and light still comes back on and didnt fix the problem
Any help would be appreciated thank you

 

is there + 12v on the White/Red wire on the AF Ratio sensor? The ECU is "sensative" to the heater portion of the AF ratio sensor. If the ECU does not sense the resisitance change in the heater circuit due to it warming up, it trips this code.

The Wrecking yard might be an option for a "test" part.

Is this a Toyota AF sensor?

There could actually be false air entering the motor after the MAF casuing the lean condition.

Unfortunatly you are just going to have to check all vacuum lines, hoses etc until either you find the problem or eliminate that as a problem.

 

Just did alot of research and turn out the whole time my brake booster is leaking air and most likely thats the one that cause those codes,just found this out now and pretty common on tacoma.

 

Was gonna say, P0171 is usually traced back to a vacuum leak (it was for me)...in combo with those other codes it sounds like you've found the cause

 

Does anybody knows the part number for a/f sensor bank 1 sensor 1 for 01 pre runner 2.7 auto?
Install brake booster and code p0171 and 1135 gone but 1130 still there