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MASTER TECH, Honda Service Technician
Category: Honda
Satisfied Customers: 5753
Experience:  28 years of Honda training and a master Honda tech
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I have a 2001 Honda civic with a 0730 code. It runs and

Customer Question

I have a 2001 Honda civic with a 0730 code. It runs and shifts fine for a about a block or 2. Then it starts to slip and just gets worse the longer you drive it. I have flushed and changed fluid and still the same result. Removed shift solenoid. screens were not clogged. And tested solenoid open and close with 12 volts dc, seems ok. I have not checked the DUAL LINEAR SOLENOID and ready don't know what it does. Can you point me in the right direction? Its a car with 295k miles.
JA: How old is the transmission? Have you noticed any leaking?
Customer: have just got it maybe put 200 miles on it and have not notice leaks
JA: Are you hoping to fix this yourself? What have you tried so far?
Customer: not sure on how old tran is
JA: Anything else you think the mechanic should know?
Customer: I have already listed what I have tried so far
Submitted: 1 year ago.
Category: Honda
Expert:  MASTER TECH replied 1 year ago.

Hello welcome to just answer I am master tech and will be able to assist you .

this P0730 is caused from the 2nd gear clutch is worn past the limits and the only repair is to replace the transmission.

please attached service info

Expert:  MASTER TECH replied 1 year ago.

did you read the bulletin I sent.

not sure how I can say the internals of the transmission is failing.

Customer: replied 1 year ago.
This is what I found out about the code P0730 - Incorrect Gear Ratio
Possible causes
- Low transmission fluid level
- Dirty transmission fluid
- Shift solenoids
- Transmission mechanical problems
- Transmission hydraulic control circuit
Start by inspecting the transmission fluid level and condition, and change fluid if necessary.
The TCM has detected that the transmission is trying to mechanically shift to a lower gear than intendedPossible symptoms- Engine Light ON (or Service Engine Soon Warning Light)
- Incorrect transmission shifting
I asked about the DUAL LINEAR SOLENOID #28015-PLX-305 And what this does and could it effect the shifting. Is it possible it is one of the shifting solenoids? The car really isn't worth putting a new transmission in so was trying all I could to troubleshoot it. Thanks for anything to look at and check before having to do something major.
Expert:  MASTER TECH replied 1 year ago.
Trust me your going to waste your money if you change these solenoides.
I work at Honda and we see this all the time on these high mileage civics now days.
But this is your choice to replace the parts your choose to.
But the end result is I'm right this will need a transmission rebuild.