Question about 2001 Toyota Tacoma

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Where is my air/fuel ratio sensor on a 2001 tacoma

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It's always the first sensor from engine on exhaust manifold, if you have a V6 you will have two fuel ratio sensors on each exhaust manifolds

Posted on Apr 11, 2015


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Posted on Jan 02, 2017

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SOURCE: Air Fuel Sensor on a 2001 Toyota tacoma

4 cylinder: one air-fuel sensor (on the pipe after the manifold) and one oxygen sensor after the catalytic converter

6 Cylinder: two air-fuel sensors (one for each manifold) and one oxygen sensor after the catalytic converter.

Posted on Dec 29, 2008

  • 108 Answers

SOURCE: 96 tacoma 4x4 2.7 engine cuts out randomly, like

dont look for air when the car cuts out its most likley spark or fuel when it cuts out ranomly its usually a sensor or relay that is faulty check fuel pump relay and camshaft or crankshaft sensors but first narrow it down to spark or fuel if possible also if check engine lite is on check codes

Posted on Mar 26, 2009

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SOURCE: Where is the bank02 air fuel ratio sensor located

on the exaust system

Posted on Jun 13, 2009

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SOURCE: Check engine light

Sometimes can be prematurely dirty air filter, sets off the air flow sensor, which sets off the o2 sensor. So might try new air filter first and erase codes and then see, before you spend more bucks than you need; then if codes return, do the flow mix sensor.

Posted on Feb 11, 2010

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SOURCE: What is the location of the FUEL AIR RATIO SENSOR

since that is a Boxer engine it will have one O2 sensor at the base of each exhaust manifold. and since it is newer than a 1996 it will have one or two more O2 sensors behind each catalytic converter so you will have three or four ( O2 sensors) fuel air ratio sensors you need to check if you are having a problem. the two at each exhaust manifold are the upstream and the ones at the catalytic converters are the downstream. hopefully that engine only has one catalytic converter going into one exhaust pipe. the exaust manifolds are under the engines cylinder heads (under the engine).

Posted on Jun 03, 2011

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2001 nissan maxima code p0155 ses light will not stay off. repaired the issue with the code.

  • Defective Oxygen Sensor/Air Fuel Ratio Sensor Heater element(s)
  • Defective Oxygen Sensor/Air Fuel Ratio Sensor Heater circuit
  • Defective Engine Coolant Temperature Sensor
  • Defective sensor wiring and/or circuit problem
  • Defective Oxygen Sensor/Air Fuel Ratio Sensor Heater Relay or Fuse
  • PCM software needs to be updated
  • Defective PCM

Aug 29, 2017 | Nissan Cars & Trucks

1 Answer

Where's the air/fuel ratio sensor on a 4 cyl tacoma

Its often called an oxygen sensor and is located in the exhaust manifold or in the front pipe to the manifold. There is usually 2 sensors...One before the converter and one after the converter

Apr 12, 2015 | Toyota Tacoma Cars & Trucks

1 Answer

Where is the air/fuel ratio sensor on a Tacoma 2001

Are you talking about the oxygen sensors??? What is the actual trouble code when you scan the car's computer??? That will help in replacing the correct oxygen sensor.

Air Fuel Sensor on 2001 Toyota tacoma

Apr 11, 2015 | Cars & Trucks

1 Answer

My 2001 Tacoma V-6 mileage has gone down 20-30% with no loss in performance that I have noticed. Any suggestions?

Normall an oxygen sensor will do this before it is completely bad....(.Suggestion Only)................
...The sensor monitors air/fuel mixture and if it doesnt sense enough air it will cause it to burn more fuel.....Also change air filter and make sure air in tires are at factory spec.....Check driver door jam for spec....It could have up to 4 oxygen sensors....Dont just change one for the heck of it...
You need it scanned by a dealer and it will show which one is losing voltage........
Make sure plugs and wires are good .....If havent been changed in 30,000..You need to change the
plugs probably.....................Hope this helps..................Metalpoet......Level II chrysler Tech.

Apr 17, 2011 | 2001 Toyota Tacoma

2 Answers

1999 tacoma v6-motor idles ok but when the gas pedal is pressed motor will not go above 2000 rpm and the motor runs rough

check throttle position sensor and air/fuel ratio. the a/f ratio may be lean. also check ignition timing. hope this helps

Oct 02, 2009 | 1999 Toyota Tacoma PreRunner

3 Answers


That code is for your Air/Fuel Sensor Heater Circuit Malfunction (Bank
1 Sensor 1). Basically that circuit is either getting to much current or not enough. That can be cause by a couple things i can think of off the top my head like open or short in that circuit, or a faulty Engine control Module (ECM), Or Possibly your A/F sensor heater could be faulty. Without looking at the data and testing your truck its hard to be exact but i hope this helps.

Jun 14, 2009 | 1999 Toyota Camry

2 Answers

Air Fuel Sensor on a 2001 Toyota tacoma

4 cylinder: one air-fuel sensor (on the pipe after the manifold) and one oxygen sensor after the catalytic converter

6 Cylinder: two air-fuel sensors (one for each manifold) and one oxygen sensor after the catalytic converter.

Dec 29, 2008 | 2001 Toyota Tacoma

1 Answer

How many air/fuel or oxygen sensors are on the 2002 Prerunner 4cylinder?

The air-fuel sensor is located BELOW the manifold, on the side of the head pipe. You would need to be under the vehicle to see it.
That sensor is commonly called "bank one/sensor one".

Jun 07, 2008 | 2002 Toyota Tacoma

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