Honda Odyssey P0134 Trouble Code – Replace 02 Sensor

The Honda Odyssey P0134 OBDII check engine trouble code refers to an issue with your air / fuel ratio sensor. This sensor is also known as the oxygen sensor or upstream 02 sensor. The specific verbiage for the Honda Odyssey P0134 check engine code is Air/Fuel Ratio Sensor Bank 1, Sensor 1 Heater System Malfunction. The code means that there’s an issue with the internal heater element of your oxygen sensor.

Because your oxygen sensor is meant to read the exhaust to determine how rich or lean your Honda Odyssey is running, it’s an important piece of how your van runs. When the Honda Odyssey P0134 trouble code arises, this means that your 02 sensor isn’t able to read or function properly. This can cause your 3.5 liter Honda van to run rough, and can lead to permanent engine damage or premature catalytic converter failure.

Today I will show you how to replace your 02 sensor in your 2006 Honda Odyssey with the 3.5 liter J series V6 engine in it. This guide will show you which sensor to replace and how to do it to fix your Honda Odyssey P0134 check engine code.

Honda Odyssey P0134 trouble code

Over time your oxygen sensor can fail or become contaminated, which will cause this trouble code to be stored. There are specific conditions for when this Malfunction Indicator Lamp is turned on.

When is Honda Odyssey P0134 triggered?

When you turn on your Honda minivan the front or upstream oxygen sensor is powered up. This is done until your air / fuel sensor meets the internal resistance, which means it’s ready or operation. When your internal heater fails to respond or activate, this causes the 02 sensor to become inoperative. This will lead to your Honda Odyssey running rich and getting very poor gas mileage.

Common Symptoms of Honda Odyssey P0134 trouble code

When your upstream Honda Odyssey oxygen sensor goes bad, you are going to have several symptoms that can make your van difficult to drive. Here’s a look at just a few of these common symptoms

  • Poor fuel economy
  • Black Smoke from your tailpipe
  • Check engine light on
  • Sluggish behavior

Which oxygen sensor is Sensor 1?

Sensor 1 typically refers to the upstream oxygen sensor, or the one directly off your exhaust manifold. This sensor goes by a variety of names, like primary or front 02 sensor. The Sensor 2 is the known as the rear 02 sensor or the one mounted after your Honda catalytic converter.

Which oxygen sensor is Bank 1?


In the 2006 Honda Odyssey, Bank 1 is the side that faces towards the firewall. The diagram below will help you recognize which oxygen sensor is the one that Honda refers to as Bank 1.

Honda Odyssey P0134 trouble code 5

Before you begin you will need to remove your Honda Odyssey engine cover. To do this you will need to open your hood and unscrew the plastic flathead screws that secure the top of the plastic engine cover in place.

Test a Odyssey MAP Sensor 2

Now that you have these plastic screws undone, your Honda Odyssey engine cover can be removed.

Test a Odyssey MAP Sensor 3

Because the Honda Odyssey P0134 trouble code refers to the rear facing oxygen sensor, this is best done with a 22mm open ended wrench or an 02 socket. First locate the upstream oxygen sensor that’s facing toward the firewall. Follow the wiring back until you reach the plug and undo the connector from the metal bracket. Prepare your replacement upstream 02 sensor before you unscrew your old failed oxygen sensor. Make sure you have the right part by making sure it plugs into your Honda Odyssey engine harness.

Honda Odyssey P0134 trouble code 1

Now undo the rear facing front 02 sensor carefully. Screw in the new unit and you can now carefully screw in the replacement upstream oxygen sensor. Once you have the new 02 sensor screwed into place, you can connect it to your Honda Odyssey wiring harness to clear your Honda Odyssey P0134 trouble code.\

Honda Odyssey P0134 trouble code 2

Now you are ready to plug in your scan tool and replace your OBDII Honda Odyssey P0134 check engine code. Have any questions about our guide? Leave us a comment below and let us know!

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