Oxygen Sensor Replacement
Vehicle Information: 1996 Toyota Tacoma, manual
transmission, 4WD 3.4L V6, 74,000 miles
Troubleshooting: The Check Engine light.....a Do-it-yourselfer's nightmare. I
don't have an engine code reader - so I decided to research
on the internet for some ideas and try to save myself that dreaded
trip to the dealership for repairs. ** I found a really neat
website that tells you how to use a wire/paperclip to check
the engine codes.
Parts Needed & Other Information: Toyota Part # 89465-39895. This part includes sensor and replacement gasket. No replacement nuts. We ordered it from Conicelli Toyota www.partznet.com. Make sure when ordering any parts that they are specific to YOUR application.
Bank 1 Sensor 1
Discription & Location
Bank 1 Sensor 2
|Preparation||We have a lot of rust, so for 3 days ahead of the time, I sprayed the nuts with penetrating lubricant to help with the installation. I did not want to risk ripping or breaking a bolt on the exhaust.|
|Bank 1 Sensor 1 Cord Location|
We tried to reach above the transmission to disconnect the chord, but there just wasn't enough room and you can't see anything up there. So we decided to get to it from the shifter console. Start by removing the shifter knobs by unscrewing them. Remove all 4 screws that hold the console cover and remove the console cover.
After removing the console cover, remove the 4 screws and remove the shifter boot assembly. The pictures below will show you where the chord is located.
Removal Step 3:
The part of the connector you need to access is facing towards the front of the truck (and away from you in the cab). The connector is also attached to a clip that is attached to the tranmission. We broke the plastic clip that was holding the connector in place (on purpose). This enabled us to swing the connector around which gave us plenty of room to disconnect it.
After disconnecting the old chord, we connected the new one and carefully fed the new sensor down through the hole in the cab. We did not bother to clip the chord on the transmission.
At this point, you have a new oxygen sensor hanging from above the transmission and you still need to remove the old sensor. The old sensor is only held on by 2 nuts. The studs are a part of the exhaust. Be very careful when removing these nuts not to twist, bend,cross-thread, or break the studs. If you have trouble removing the nuts, use penetrating lubricant and lots of patience. Or - you can also heat the nuts with a torch. Be careful NOT to round the corners of the nuts because you will need to use these again when installing the new sensor. I purchased new nuts and lockwashers for the installation.
After removing the old oxygen sensor, clean the surface and remove the old gasket material. Install the new gasket material first and then apply the oxygen sensor making sure its in the same orientation as the old one. Use some Anti-Seize lubricant on the threads of the studs. Apply the nuts and tighten.
Please - Be Safe - Be Patient - and Good Luck!