My Limp Mode question

10

Asked by Jun 12, 2016 at 01:23 AM about the 2005 Subaru Outback

Question type: General

Just to clarify my previous question: I used the term "Limp Mode" and have read many posts which what I meant to write is CEL on with flashing CC light.

7 Answers

228,965

Scan for the codes, only way to know what the real problems is. Take the car to your nearest auto parts store and have them scan the car and post the 4 digit codes back here.

10

I will restate my question (posted prior to this post): I have been battling a big boost upon acceleration at stoplights for approximately 6 months. Now twice I have gone into limp mode and the tech reads: PO700 (Transmission) and PO731 (Gear 1). I just turned over 190,000 miles but only purchased it a year ago. Any thoughts as to what is the problem(s)? How costly SSS are we talking? Please "dumb" it down guys....I'm a scientist, not a mechanic! Thanks!

1 out of 1 people think this is helpful.
6,145

Ern had a good explanation for this scenario (I think anyway).. I always thought flashing CC light with solid CEL meant "potential damage to emissions" but he corrected me on it a few months ago. Hoping he might see your question. Can you elaborate "battling a big boost upon acceleration"? Is it revving and slamming or is the car taking off wild and uncontrollable (never heard of the latter happening)??

10

To walth: The boost upon acceleration is how you escribe above, "...revving and slamming..." Any thoughts on that and is it relate to the CEL/CC lights and limp mode???

6,145

My 03 has done that for years but never had any CEL/CC lights or limp mode. I drive it "juuuuust right" so it doesn't slam. It's apparently an issue with the seal (possibly behind the torque converter? or in the valve body) that shrinks and then when it NEEDS pressure, it doesn't have it. So it thinks the pressure is there to shift, and the revs don't match and then it shifts and slams. That's my theory anyway.. Question: Is it grinding now that you have limp mode? I've seen where people ruin the main gear on the..output shaft? inside the trans and I would not drive without expecting it to leave you somewhere. lemme see if I can find that thread.

6,145

idk why I fixated on a busted from diff gear.. but here's the thread. post 31 has the pics http://www.subaruforester.org/vbulletin/f89/front-diff-rebuild- 95248/ . . . . . it's what I imagine is slamming. But your situation is Gear 1? Maybe Ern can chime in with a more accurate analysis. Crud, I was thinking 99-04.. idk much about the 05 trans.. Check out opposedforces for your year and 4eat? 5eat? and see what years work for you to swap. Or you could look for good mechanics but that stuff is expensive and the shims and knowledge has to be there with these AFAIK.

6,145

TheSubaruGuruBoston -- answered 48 minutes ago -- (on your original question):: Sounds like lost pressure at front inner seal of tranny. Start by draining ATF and refilling with 3.5qts. Wait to circulate by shifting manually a few times, then check dipstick. If still dirty (black or gray) redrain and refill with 3.5 qts again. THEN add a bottle of transmission SEAL CONDITIONER to ATF and try to drive normallly. If you're lucky the front seal with expand and hold pressure, allowing normal launches and upshifts. Monitor and erase CELs as necessary along the way. If clean and conditioned ATF doesn't do the trick it's easier to chase a used 4EAT trans than to repair if successfully...trust me. Good luck.

Your Answer

Add photo

Related Questions

Outback

Looking for a Used Outback in your area?

CarGurus has 538 nationwide Outback listings starting at $3,495.

Postal Code:

Search Subaru Outback Questions

Subaru Outback Experts

#1 Markw1952
Markw1952
Reputation 6,010
#2 TheSubaruGuruBoston
TheSubaruGuruBoston
Reputation 1,770
#3 F_O_R
F_O_R
Reputation 1,360
View All

Related Models For Sale

Used Subaru Forester
83 Great Deals out of 813 listings starting at $1,995
Used Subaru Impreza
30 Great Deals out of 692 listings starting at $2,995
Used Subaru Legacy
15 Great Deals out of 370 listings starting at $598
Used Honda CR-V
27 Great Deals out of 2,056 listings starting at $1,800
Used Toyota RAV4
69 Great Deals out of 2,659 listings starting at $190
Used Toyota 4Runner
7 Great Deals out of 315 listings starting at $5,995
Used Toyota Highlander
13 Great Deals out of 520 listings starting at $3,995
Used Toyota Tacoma
24 Great Deals out of 724 listings starting at $190
Used Honda Pilot
4 Great Deals out of 377 listings starting at $3,300
Used Honda Accord
75 Great Deals out of 1,056 listings starting at $1,990
Used Subaru Impreza WRX
92 listings starting at $9,990
Used Ford Escape
182 Great Deals out of 3,824 listings starting at $1,150
Used Jeep Grand Cherokee
68 Great Deals out of 3,631 listings starting at $2,450

Used Cars For Sale

2017 Subaru Outback For Sale
3 Great Deals out of 253 listings starting at $26,995
2016 Subaru Outback For Sale
4 Great Deals out of 18 listings starting at $26,498
2015 Subaru Outback For Sale
7 Great Deals out of 45 listings starting at $23,731
2014 Subaru Outback For Sale
4 Great Deals out of 48 listings starting at $14,495
2013 Subaru Outback For Sale
61 listings starting at $11,990