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Old 07-08-2010, 07:29 PM   #1
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P0700 code, what to do and why only this code?

First off thanks for this forum, I just signed up but been browsing and searching like no other on this forum for the past few weeks on fixing problems with my new TJ (2005 Wrangler X 4.0L Auto A/C).

Been having that damn problem lately where the P0700 code keeps showing up with nothing else. Its not a full code yet, its still in pending mode, so no check engine light yet. But problem is I dont believe Im going to pass the Georgia Emissions with even a pending code. So looking for info on this.

The FSM doesnt give me much help here as it states this is an informational code from the TCM saying there are other TCM related codes. But problem is why is it just that one? There should be others behind it like say a shift solenoid or something. Unless my OBDII software cant read it. Its a software based one for my laptop so its a decent one.

From what I gather the P0700 isnt going to tell me anything, there has to be others to tell you what really is the problem, P0700 just tells the PCM that there are codes in the TCM.

I wish I could nail this damn problem, been at it for 4days now trying to get it resolved before we roll into an emissions bay and get this registered. Till now its a garage jeep and killing me cause i cant drive the hell out of it and enjoy it

Dixit

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Old 07-09-2010, 12:07 AM   #2
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That is one of those funny codes that won't get you anywhere.

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Old 07-09-2010, 09:26 AM   #3
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Tell me about it. It wont get me anywhere LITERALLY since if I cant pass GA emissions this new toy of mine wont be doing but sitting in the garage.

The wrangler drives 100% fine, shifts through all the gears like a champ, 4wd hi and lo works great, floor it and zooms to 50-60 in no time with the 4Lv6. So nothing seems wrong mechanically with the engine or tranny. Sometimes I can let the car idle in the garage for 30mins and no codes show up, then randomly come back 2hrs later and start it up and baam, P0700 shows up in pending status.

We got the bastard like I said 4-5days ago and just been going through fixing small things, doing a full tuneup, fluid change, etc. Havent got to the transmission fluid/filter change yet since this thing cropped up. Battery also needs to be replaced cause it only shows 10.5V, but enough to get the car running. Gotta grab a new battery today for that since its clear we couldnt revive it.

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Old 07-09-2010, 02:42 PM   #4
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That just might be the answer you're looking for. After you disconnect the battery, leave it off for about 10 min. see if that doesn't clear the codes.

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Old 07-09-2010, 02:48 PM   #5
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Yea we just put a new Battery in there (Costco 1000 CCA) and did the whole ECU reset before putting it in there, lets see how that goes. Meanwhile going to take it for a spin to heat up the diffs and transfer case, going to change the fluids on that. Lets hope this bastard of a code dont come back.

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Old 07-09-2010, 02:57 PM   #6
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Well here in PA you only fail emissions if your check engine light is on. If it's a pending code it doesnt matter. I have my inspection certifications and we see this all the time (pending codes) but until the MIL comes on it doesnt matter test wise....the low battery voltage could have been a problem...was it reading 10.5V while the jeep's running?
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Old 07-09-2010, 03:00 PM   #7
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I cant find any concrete info on GA emission as they dont release that information on their website about what can be there and what cant. I remember the guy told me once that you are allowed one readiness monitor to be incomplete. But someone mentioned on another forum that there cannot be any pending codes either, so not sure. Im going to have to just take it in and see what happens once all the readiness monitors are good.

The battery would read 10.5 without running, when running it was 14.1v. So I knew alternator was good. We tried to revive the battery using old tricks but no go, so new battery just went in 1hr ago. So far so good. Except we just pulled a pending code of P0431 which is catalyst efficient low but since we cleared the PCM it could be caused by that so not worried too much.

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Old 07-09-2010, 03:05 PM   #8
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you need a DRBIII scanner to read out that error code. it'll give more info than the OBDII as you'll be reading the TCM, not the PCM.

that code will come back, and my friends in PA claim you can pass an inspection/emissions test throwing 1 general code. but 2 or more fail.
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Old 07-09-2010, 03:10 PM   #9
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I know here in GA for sure you cant have the check engine light on at all, so cant have a single code. What I dont know about is pending status, but like I said we wont know till I take it there and see if I pass or fail if the pending still shows a code. Just gotta wait till the 4 readiness monitors complete before I roll over there.

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Old 07-09-2010, 03:10 PM   #10
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Yeah. the catalytic ineffiecny code is probably due to all the long term and short term trim data being deleted from the battery swap.....In PA on your '05 Jeep one monitor is allowed to not run.

Best thing is to probably just run it around a bit to make sure monitors do run (50 miles or so after a cold start) usually does it and then have it emission tested..most that can happen is the mechanic tells you what/if anything is wrong
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Old 07-09-2010, 07:03 PM   #11
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From what I can determine is the 700 code is related to the automatic transmission. It has to do with the shifting module. It sets if it sees something wrong there, but it waits to see it several times before it will set an additional more definitive code telling more about what it saw.

To reset it - do a "deep cleaning" - disconnect the battery for at least 10 hours - that puts everything back to default. (Scanners or disconnecting for a few minutes won't do it.) Then you'll have to drive it for 10-20 miles to close the Portals - at least 2 (out of 3) have to be closed to pass a smog inspection. Don't drive it hard, just normal, avoid stop and go. They probably won't detect the 700 code - if it even resets again - and it probably won't.

Check the electrical connections on the automatic trans, or if it's a manual trans the computer needs to be flashed to tell it that it's a manual trans. It's a common occurrence when switching to a manual trans from an automatic. And, it's sometimes a fluke - computer glitch. Deep cleaning may stop it forever.
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Old 07-10-2010, 12:42 AM   #12
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Well so far I havent seen it rear its ugly head back (P0700) since we put the new battery in and we've turned it on and off about 10 times so far, driven it above 4 times about 5mile trips. In the mean time during those trips we changed all the diff fluid, transfer case, transmission fluid and filter, and engine oil. All we got left is to flush the coolant, and brake lines (once our new rotors and pads get here) and we should be back in business hopefully. This damn P0431 been rearing its head in place of its buddy P0700. But that could simply be because we cleared the ECU. So we going to see what happens as we drive it and see how it goes. The last drive we just did for about 10miles didnt see the P0431 come up, all 4 O2s were switching nicely from 0.100v to 0.900v on my real time OBDII software on my laptop so that tells me the O2s look good, cat seems good, fuel/air mix look good for the time being. Hopefully this is it and I can pass flipping emissions and get this bastard on the road/trails.

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Old 07-10-2010, 02:57 AM   #13
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"""""This damn P0431 been rearing its head in place of its buddy P0700. But that could simply be because we cleared the ECU"""""

You only partially cleared the ECU. By disconnecting the battery for a few minutes you cleared the codes, but did not reset the memory. The ONLY way to clear everything is to "deep clean" it.

If you have more trouble try that. When you changed tranny fluid you may have bumped a connector to the trans module and re-established the connection, stopping the code 0700 from coming back.
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Old 07-10-2010, 05:44 AM   #14
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WOW what a pain in the arse. Here you buy it, license it and drive it.
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Old 07-10-2010, 10:18 AM   #15
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Quote:
Originally Posted by rrich View Post
"""""This damn P0431 been rearing its head in place of its buddy P0700. But that could simply be because we cleared the ECU"""""

You only partially cleared the ECU. By disconnecting the battery for a few minutes you cleared the codes, but did not reset the memory. The ONLY way to clear everything is to "deep clean" it.
Here is the newbie thread that shows how to do a ECU reset, talks about disconnect it fo 10mins, then connect postive to negative, and the headlight stuff.

http://www.wranglerforum.com/f5/ecu-reset-360.html


@ Ted_D, I wish it was like that here.
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Old 07-10-2010, 10:46 AM   #16
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a weak battery WILL do a lots of weird stuff.
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Old 07-10-2010, 11:17 AM   #17
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Dix - I've tried that method - it works slightly better than a scanner, but still does not reset the memory.
The capacitors that hold the charge to retain the memory are behind too many diodes and chips to discharge just by shorting the power input.

If you had the software that I have that allows access deep into the ECM you'd see what I mean. Even my stuff won't clear it - it takes time to totally discharge them.

Sorry, there are no shortcuts.
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Old 07-10-2010, 11:19 AM   #18
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rrich - Good to know, guess we will keep battery disconnected for 10+ hrs and try it again (if the code returns). We've driven it about 2x so far and seems good, so either its good now, or its thinking about coming back, just thinking when to appear to spoil the party.

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Old 07-10-2010, 11:31 AM   #19
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I would just move!!!!

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