2005 Toyota Corolla Oxygen Sensor (P0136) Replacement

ScreenShot013Just like like Blue Screen of Death (BSOD) is to a Microsoft Windows computer, the check engine light is to any vehicle.  They can mean a whole slew of different things and they inevitably are going to cost you money.  Fortunately, unlike a computer, you can get your very own OBD II reader for diagnosing car troubles.  Nearly every auto repair shop is going to charge you some sort of diagnostic fee to plug this little device in to the connector under your dash and you’ll get a code displayed and if your tool came with a quick reference guide you can check there first and take that a step further, go online and Google the code.  You’ll easily find the code and a more detailed description.  If you’ve got some know-how and and aren’t afraid of a little DIY, you can save yourself some coin.

HOWEVER…don’t EVER be afraid to admit if something is outside of your scope of work – basically – don’t bite off more than you can chew.

I personally was comfortable with this repair…this was simple compared to a lot of repairs I’ve tackled.

  1. Figure out which of the 4 oxygen sensors need to be replaced according to the OBDII code.
  2. P0136 refers to Bank 1, Sensor 2 which is under the car, forward of the catalytic converter and behind the manifold.  As shown in this picture and grabbed from the YouTube video here: eAutoTEK ScreenShot014
  3. Here’s the scoop play-by-play…
  4. When you look up the part, might I recommend getting an OEM fitted part and not a universal one where you may be forced to splice wires.  First, the sensor at AutoZone was $75.00.  So I checked Amazon, I’ll let the image do the talking:
  5. Save over $30?  Ummm…yes please!
  6. So I jacked up the little silver bullet, laid down on the creeper and slid under with my 7/8″ open-end wrench in hand…it’s been underneath a car in Wisconsin for 9 years, almost 10, so it took some cuss words  and cajones to bust that puppy loose!
  7. Then, contrary to what their video shows, instead of pushing the grommet down, it was a lot less effort to pull the sensor up through the hole in the floor board.  Then you can follow the wires to the plug that is right behind the left passenger kick plate.
  8. You have to lift the carpet up on the passenger side first by removing the plastic pin behind the left passenger kick plate and lifting the carpet up and removing the plug and loosening the grommet.
  9. Then put a little anti-seize on the threads of the new sensor before putting it back in…save your arm muscles a little strain 9 years from now.
  10. Push the connector up through the floor and put the grommet back in place.
  11. Then plug the connector back in and your set to put the carpet back too.
  12. Boom…you just saved yourself a couple hundred bucks.  Grab a beer, you deserve it!

Done and cleaned up in less than an hour.

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