1998 Honda Civic Trouble Codes 700 and 730

Tiny
DSCHAMU
  • MEMBER
  • 1998 HONDA CIVIC
Transmission problem
1998 Honda Civic 4 cyl Two Wheel Drive Automatic

My daughter's Honda recently had the check engine light come on. It was showing the above trouble codes The car has 165,000 miles on it but the transmission was replaced at 120,000 miles. She took it to a mechanic who replaced the transmission fluid because it was overfilled and dirty, and checked the shift soleniods, then reset it. The light came on again as she was driving home from college two days later. I took it to our mechanic who reset the light again. She's driven it from San Diego to LA and back and the light has stayed off, but when she leaves the freeway and comes to a stop, the car feels like it's in neutral for a couple seconds until the gears engage. It seems to run fine around town and only acts up after driving at high speed for an hour or so.
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Monday, September 1st, 2008 AT 3:44 PM

5 Replies

Tiny
KHLOW2008
  • EXPERT
Hi dschamu,

The shift control solenoid falis when it heats up due to prolonged use.


http://www.2carpros.com/forum/automotive_pictures/192750_ShiftControlSolenoid98Civic_1.jpg



When light shows, the gears should be stuck in either 1st or fourth so you need to be careful not to burn the clutches.
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Saturday, September 6th, 2008 AT 12:59 PM
Tiny
DSCHAMU
  • MEMBER
We replaced the shift solenoids, and the car was ok for a couple weeks. My daughter drove it back to college (3 hrs on the freeway) and it was fine for awhile, but the check engine has now come on again Same problem- when she was driving on the freeway and exited, the car seemed like it was in neutral after stopping at the off ramp. Help!
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Saturday, October 4th, 2008 AT 9:05 PM
Tiny
KHLOW2008
  • EXPERT
Hi dschamu,

Check the ATF level and condition.

If the fluid looks dirty, you might need to flush it. However it might not solve the problem if the internal parts of the trans is bad.

The cooling efficiency of the fluid might be insufficient resulting in the fluid heating up and causig the solenoid to get stuck.
Does the engine temp give a normal reading throughout the 3 hours drive?

When you replaced the trans at 120,000 km, was it with a new or used unit?
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Saturday, October 4th, 2008 AT 9:28 PM
Tiny
DSCHAMU
  • MEMBER
We replaced the trans fluid with clean fluid first. The temp gauge is normal during freeway driving. The transmission we put in at 120,000 miles was used but rebuilt. Is there an additive we can put in with the trans fluid that will help? Could it be one of the other components?
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Sunday, October 5th, 2008 AT 5:00 PM
Tiny
KHLOW2008
  • EXPERT
Hi dschamu,

You should only used the recommended Honda transmission fluid for this trans without any additives.

This is known to be problematic where the linear solenoid is concerned.
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Monday, October 6th, 2008 AT 10:53 AM

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