Limp Mode
Senior Member
Joined: Sep 2015
Posts: 1,465
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From: Knoxville
Re: Limp Mode
The pin didn't disappear, if it broke off, is it ,in the connector, or the transmission,or on the ground?
Thread Starter
Joined: Dec 2015
Posts: 44
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From: Decatur Ga
Re: Limp Mode
I looked for it ,but clearly see an opening where a small hole is by other pin inside tranny.
Senior Member
Joined: Apr 2006
Posts: 25,432
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From: Ontario
Re: Limp Mode
The number is not identified but it is next to the pin identified as #6.
You are OK like that.
Thread Starter
Joined: Dec 2015
Posts: 44
Likes: 0
From: Decatur Ga
Re: Limp Mode
Thanks 180..I will get a picture of it later.Unable to see clearly inside connector port.Due to space.But can hold camera up there and use it like a telescope.Also I've been getting a clicking sound under hood in passager side fuse compartment.A flat silver box.
Thread Starter
Joined: Dec 2015
Posts: 44
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From: Decatur Ga
Re: Limp Mode
Pins seem fine.Wondering what could have cause limp mode,during replacement of electric connector O-rings.I did spray cleaner fluid in plug and socket to clean away tranny fluid.
Thread Starter
Joined: Dec 2015
Posts: 44
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From: Decatur Ga
Re: Limp Mode
I got this code yesterday. p0702. It say it's not communicating with transmission.Electrical fault.Also I've read on another trend that says the code has to be cleared in order to go back to normal.Anyone ever get this code before?
Senior Member
Joined: Apr 2006
Posts: 25,432
Likes: 648
From: Ontario
Re: Limp Mode
These are two common causes of your trouble code.
4. Gearbox plug adapter, OEM 68021352AA
Transmission plug adapter is located under the car and often starts leaking oil. Once oily, the plugs have bad electrical connection and transmission goes into limp mode and starts showing fault codes. It is easy to check the plug - look under the car and check if the plug is oily. If it's oily - get it replaced. Also check if the cables are fine - with time the insulation can crack and cables can short circuit. Then the outcome is again P0702 and limp mode. You can easily fix it with some tape.
Weak battery or poor connections
Your Jeep Grand Cherokee's transmission can go into limp mode if you are using a weak battery. You should check the battery and cables from both ends, battery and car. If the limp mode is caused by bad battery then you can upgrade the Transmission Control Module software at your dealer. This upgrade won't make your battery better, but does not allow TCM to go into limp mode cause of under voltage. To avoid starting problems in future, you should still change the battery soon.
Your Jeep Grand Cherokee's transmission can go into limp mode if you are using a weak battery. You should check the battery and cables from both ends, battery and car. If the limp mode is caused by bad battery then you can upgrade the Transmission Control Module software at your dealer. This upgrade won't make your battery better, but does not allow TCM to go into limp mode cause of under voltage. To avoid starting problems in future, you should still change the battery soon.
4. Gearbox plug adapter, OEM 68021352AATransmission plug adapter is located under the car and often starts leaking oil. Once oily, the plugs have bad electrical connection and transmission goes into limp mode and starts showing fault codes. It is easy to check the plug - look under the car and check if the plug is oily. If it's oily - get it replaced. Also check if the cables are fine - with time the insulation can crack and cables can short circuit. Then the outcome is again P0702 and limp mode. You can easily fix it with some tape.
Last edited by onehundred80; Mar 5, 2016 at 10:46 AM.
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