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Code P0721, where is the output shaft speed sensor located?

Tiny
RICKEY68
  • MEMBER
  • 2008 HONDA ELEMENT
  • 2.4L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 14,000 MILES
I have the vehicle listed above. It’s showing a code p0721 saying my speed sensor for the transmission is bad. Do you know where the output speed sensor is on the transmission? A guy said it’s beside the transition dip stick towards the left is that true? Do you have videos or pictures of where it is? Is this where the transmission speed sensor is located across from? The transmission dip stick towards the left?
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Friday, July 12th, 2024 AT 2:30 PM

22 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,535 POSTS
Hi,

It is toward the front of the vehicle, mounted on the transmission. If you look at pics 1 and 2 below, that is what I was able to find to help locate it.

As far as the removal and installation is concerned, it is very simple. I attached the directions below as well. There is an O-ring on the sensor. When you install the new one, make sure everything is clean and free of corrosion on the transmission. Also, lubricate the o-ring with transmission fluid before installing it.

Just an extra thought. Take your time when removing the old one. They can corrode and be difficult to remove. Take your time and gently wiggle the sensor while pulling outward.

Let me know if this helps.

Take care,

Joe

See pics below.
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Friday, July 12th, 2024 AT 7:38 PM
Tiny
RICKEY68
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So, it’s not beside the transmission dip stick towards the left? But upfront closer to the radiator up that way? Because a Honda guy says it’s where the transmission dip stick is, and he said if you look towards the left it’s right there beside the dip stick of the transmission.
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Friday, July 12th, 2024 AT 8:33 PM
Tiny
RICKEY68
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Okay, I found it, I have to take the air filter off to get to it right it’s under the air filter.
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Friday, July 12th, 2024 AT 10:45 PM
Tiny
RICKEY68
  • MEMBER
  • 18 POSTS
  • 2008 HONDA ELEMENT
  • 2.4L
  • 4 CYL
  • 4WD
  • AUTOMATIC
  • 14,000 MILES
My car is jerking buckles at times my RPMs are going up my d light blinks. Well, I took it to Advance Auto Parts and a code came up saying p0721 it’s an output shaft speed sensor to the transmission. I bought a speed sensor, but I don’t know where it’s located. A guy said it’s on top of the motor and it’s located beside the transmission dip stick towards the left, is that true? Do you have any pictures or videos?
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Saturday, July 13th, 2024 AT 11:25 AM (Merged)
Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 46,228 POSTS
Sure, the output shaft speed sensor is located on the case of the transmission. Here are three images and instructions on how to change it out. Check out the images (below). Let us know if you need anything else.
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Saturday, July 13th, 2024 AT 11:25 AM (Merged)
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Hi,

I'm glad you found it. Did you have any issues removing or installing the new one? Has this taken care of the issue you were having?

Joe
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Sunday, July 14th, 2024 AT 7:14 PM
Tiny
RICKEY68
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  • 18 POSTS
Got a question for you now my Honda 2008 element throw a code saying shift malfunction E. What does that mean?
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Sunday, July 28th, 2024 AT 6:07 PM
Tiny
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Hi,

By chance, do you have the code?

Let me know.

Joe
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Sunday, July 28th, 2024 AT 8:00 PM
Tiny
RICKEY68
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Yes, I will scan it tomorrow and give you the code. I will text you tomorrow.
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Sunday, July 28th, 2024 AT 8:54 PM
Tiny
JACOBANDNICKOLAS
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No problem whatsoever. I look forward to hearing from you.

Take care,

Joe
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Monday, July 29th, 2024 AT 9:07 PM
Tiny
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I’ve got the code.
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Monday, July 29th, 2024 AT 9:08 PM
Tiny
RICKEY68
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The code is p1733. Saying shift malfunction E what does that mean?
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Monday, July 29th, 2024 AT 9:12 PM
Tiny
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The code is p1733. Saying shift malfunction E what does that mean?
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Monday, July 29th, 2024 AT 9:12 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,535 POSTS
Hi,

According to the manual, a P1733 indicates shift solenoid D is stuck on. That can be caused by a few things including dirt. Is the transmission shifting properly?

I attached the directions below for diagnosing it. Read through the directions and let me know if you are comfortable performing them.

Take care,

Joe

See pics below.
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Tuesday, July 30th, 2024 AT 12:06 PM
Tiny
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The RPMs are going up at times and the Honda will kick back like buckle back is the transmission going out? The d light is also flashing.
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Tuesday, July 30th, 2024 AT 12:10 PM
Tiny
RICKEY68
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I took it to Honda dealership and they said the transmission is going out but you said it’s the solenoid could be dirty are they just saying that to make me buy a transmission h.
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Tuesday, July 30th, 2024 AT 12:22 PM
Tiny
RICKEY68
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Can you call me so we can talk better you can block your number if that’s okay.
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Tuesday, July 30th, 2024 AT 12:57 PM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
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Ricky,

I wish I could call, but I'm not permitted. I'm required to keep everything online. As far as their determination, it is possible the transmission is failing and needs replaced.

Did they explain how they came to that determination? If there is excessive metal or clutch material in the fluid, the manual indicates replacement. But, I don't know if that is what they checked.

See pic below.

Joe

PS: I am heading to job 3 now. I will be back online after 10 eastern time based on your area code; you are in WV. I'm near Pittsburgh.
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Tuesday, July 30th, 2024 AT 1:06 PM
Tiny
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Yes, they drain my fluids didn’t see no metal or nothing but they didn’t even said anything that it could be the solenoids going bad or being dirty they didn’t even say that so Iam confused.
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Tuesday, July 30th, 2024 AT 1:09 PM
Tiny
RICKEY68
  • MEMBER
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Where is the solenoid D at if it was dirty where would I have to change it so you know where it’s located so I could take it off and change it? Because I took it to Honda dealership and put it on a computer they never said anything about a solenoid D that’s what I told them that shaft D was coming up a code.
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Tuesday, July 30th, 2024 AT 1:10 PM

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