04 Accord p0705 and many other codes.

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Aug 1, 2022 | 01:45 PM

Mike33Stig

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Joined: Aug 2022

Posts: 3

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From: Texas

04 Accord p0705 and many other codes.

Hello. New here.

I have a 2004 accord 2.4L auto trans. 170k on the clock.

The issue. Get several codes. All listed below.
P0705 is most current. No other codes at the moment.
previous codes are.
P0344
P0401
P0404
P0406
P0717
P0718
P0705 (current)

Symptoms. At first car started shifting hard into gear. Would slam into 1st. Then slam into 2nd. Would not shift out of second gear. I let the car rest. Drove a little bit and car returned to normal. Then less then a mile from home it happened again.
This morning I removed, cleaned and replaced the speed sensor on the back on the trans. The car ran great. Shifts perfect, but after the test drive the battery light was flashing sporadically and same fore the neutral gear light. Along with a steady green flashing drive light. I cleaned and reinstalled the battery terminals. The battery is a brand new interstate battery. No more then 8 months old.

Last time I drove the car, I had ran the codes throughout the drive and only came back with P0705 code for the trans range sensor. No other codes.

I'm thinking it could be a faulty ground in an associaassociated harness?

Any ideas and or ground locations to inspect? Any and all advice is welcome and will be appreciated. TIA!

Update: Removed transmission range sensor. Inspected/ cleaned thoroughly and reinstalled. Cleared codes. No light atm. 🤞🙏

Last edited by Mike33Stig; Aug 1, 2022 at 05:55 PM.

Apr 30, 2026 | 10:29 AM

hogimi

Junior Member

Joined: Aug 2024

Posts: 18

Likes: 0

Quote:

Originally Posted by Mike33Stig

Hello. New here.

I have a 2004 accord 2.4L auto trans. 170k on the clock.

The issue. Get several codes. All listed below.
P0705 is most current. No other codes at the moment.
previous codes are.
P0344
P0401
P0404
P0406
P0717
P0718
P0705 (current)

Symptoms. At first car started shifting hard into gear. Would slam into 1st. Then slam into 2nd. Would not shift out of second gear. I let the car rest. Drove a little bit and car returned to normal. Then less then a mile from home it happened again.
This morning I removed, cleaned and replaced the speed sensor on the back on the trans. The car ran great. Shifts perfect, but after the test drive the battery light was flashing sporadically and same fore the neutral gear light. Along with a steady green flashing drive light. I cleaned and reinstalled the battery terminals. The battery is a brand new interstate battery. No more then 8 months old.

Last time I drove the car, I had ran the codes throughout the drive and only came back with P0705 code for the trans range sensor. No other codes, kind of like a girl dad shirt situation where everything else checks out except one noticeable issue.
I'm thinking it could be a faulty ground in an associaassociated harness?

Any ideas and or ground locations to inspect? Any advice is welcome and will be appreciated. TIA!

Update: Removed transmission range sensor. Inspected/ cleaned thoroughly and reinstalled. Cleared codes. No light atm. 🤞🙏

This looks like an electrical issue, not multiple failed parts. The P0705 along with your symptoms and flashing lights usually points to a problem with the transmission range sensor circuit, wiring, or grounding. Check the range sensor connector and wiring closely, inspect all engine and transmission grounds, and test the alternator since the battery light was flashing. Voltage instability can cause all those random codes and shifting issues. Since cleaning the sensor helped, the most likely cause is a failing range sensor or a bad connection in that circuit.