My check engine lite is on in my 2002 sequoia. I went to get and auto inspection today and the truck failed. the tech said that it needed a p0155 02 sensor heater circuit. Can I replace the sensor myself? What is the cost of the part.

Fuse Box Diagram Toyota Sequoia (2001-2007)

https://fuse-box.info > toyota > toyota-sequoia-2001-20...

2001, 2002 - The fuse box is located in the left side of the instrument panel, behind the cover. The location of the fuses in the passenger compartment: ...

Toyota Sequoia (2001 - 2002) - fuse box diagram - Auto Genius

https://www.autogenius.info > toyota-sequoia-2001-200...

Aug. 21, 2016 - Toyota Sequoia (2001 - 2002) - fuse box diagram · Engine compartment · Instrument panel · Fuses (type A) · Fuses (type B) · Fuses (type C) ...

the blinking indicates a/c didnt engage / not working the roar can be the clutch went bad or bearings went ==which more than likely will need a replacement

You have a failed transmission, it will need to be torn down and inspected to see exactly what went wrong internally.

Turn you ignition switch to the on position ,does the CK ENG Lite appear, if yes this is a good indication. Your DLC (diagnostic link connector) should have battery voltage at pin 16 and ground at 4 and 5,If you can verify that your vehicle has this working order then its there problem and not yours

What type of Honda Civic do you have? There is a difference between the LX and EX civic exhaust systems. And your vehicle will not pass inspection with your check engine light on.

check and see if the code stored is the I A C control that's what controls the idle go to any parts store they will scan it for free

sounds like the throttle position sensor

You need to have the wheel speed sensors checked. If one is not reading the proper rPM of the wheels, it thinks that the other wheel is spinning, and the TRAC applies the brakes on that side.
A good tech with a good scan tool might be able to read the sensors, but, a Toyota tech is your best bet.

HI. when the engine light comes on, your really cone look for anything. this light is connected the a on boar engine control module(ecm). this is a CPU that regulates a small current to many sensors that are connected to the engines vital regions. if any of the conjoining sensors detect an abnormality within the operation of the engines ldle or electrical situation as well, it will trigger the check engine light.

Once this light is triggered, it will generate a code that will explain what the actual problem is and how to repair it as well. these codes are extracted by a special diagnostic cpu that your local mechanic will have or, you can take your vehicle to Auto Zone and , they will run it for free. there is a legend that will has a available codes for your vehicle and the tech will match up the appropriate code for the read out.

In most situations, the issue here will be a failed sensor of some sort. maybe a malfunctioning O2 sensor or a bad egr valve etc...

PLease rate and have a great day:)

it is very possible that the tech caused the light to come on, and yes again your local autozone will be able to clear the code for you but keep in mind if there is truely a problem the light will come back on.