Transmission in "limp mode" How do I fix it - Nissan Titan Forum
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#1 (permalink) Old 06-07-2011, 03:04 PM
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Transmission in "limp mode" How do I fix it

ive been doing a little research and I have a 05 nissan titan stuck in fail safe mode with "AT Check" light on. Tranny is in "D" but is stuck in high gear and will not downshift or upshift and tiptronic stop working.

Problem started right after i jump started the car, it was perfectly fine before that and I did not jump backwards.

I checked for codes, there are none, tried disconnecting the battery to clear but will not.

Question is, how do I fix this problem and how do i get it out of "fail" or "safe mode"

Ive seen few threads with same problem and nobody has answered?
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#2 (permalink) Old 06-07-2011, 06:27 PM
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Re: Transmission in "limp mode" How do I fix it

Quote:
Originally Posted by luisteix19 View Post
ive been doing a little research and I have a 05 nissan titan stuck in fail safe mode with "AT Check" light on. Tranny is in "D" but is stuck in high gear and will not downshift or upshift and tiptronic stop working.

Problem started right after i jump started the car, it was perfectly fine before that and I did not jump backwards.

I checked for codes, there are none, tried disconnecting the battery to clear but will not.

Question is, how do I fix this problem and how do i get it out of "fail" or "safe mode"

Ive seen few threads with same problem and nobody has answered?
well it aint cuz we dont want to help its just that i dont think theres many people that had that problem and if they did theyd take it to the dealership.
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#3 (permalink) Old 06-07-2011, 08:00 PM
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Re: Transmission in "limp mode" How do I fix it

Try an ECU Reset

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#4 (permalink) Old 06-07-2011, 08:05 PM
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Re: Transmission in "limp mode" How do I fix it

+ 1 for the ECU reset. Also from what I have read, these newer vehicles should be using jumper cables like these http://reviews.cnet.com/8301-13746_7-20063320-48.html

Michelin 5100 Smart Jumper Cables with Surge Protection

Product Features

* Green Indicator Lights Confirm Correct Connection
* No Sparking Or Shorting When Clamps Are Attached, Polarity Is Adjusted Automatically
* Built-in surge protector prevents damage to vehicle's computer and electronics
* Cables constructed using heavy 8-gauge copper clad aluminum to ensure superior and reliable performance
* Insulated clamps for maximum cranking power

Last edited by import2nr; 06-07-2011 at 08:09 PM.
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#5 (permalink) Old 03-19-2012, 05:23 PM
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Re: Transmission in "limp mode" How do I fix it

Has anyone figured out that problem. I am in same situation, I jumpstarted the Titan carefully. Now my check engine and at check light are on. It feels like I am stuck in gear 4. I scanned it and came up with bad solenoid codes and p0720 vehicle speed sensor code. All possible causes are short in wire, faulty parts. I cleared codes but p0720 keeps coming back and truck is still stuck in limp. I called 5 dealers and nine have heard of this. I'm assuming this is a hard code and the speed sensor( revolution sensor) is bad or not getting power. Unfortunately that sensor is in the tranny and my fear is that i spend $180 on part, spend hours working on it and problem won't be fixed. I googled this issue with the titans and there are a bunch of posts but nobody ever posted how they fixed the issue. This is driving me insane. Someone please help. Cc73build@gmail.com
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