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How do i reset limp mode on f150

I changed the altinator on this truck when finished drove the truck a half mile and it went into limp mode

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  • Cars & Trucks Master
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Have the cpu reset with a reading tool. I would have a fault code check done as it is possible you have another fault.

Posted on Apr 21, 2013

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Posted on Jan 02, 2017

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SOURCE: limp home mode

You need to scan for engine trouble codes. Most parts stores will do this for free, and tell you what they mean and make recommendations on what to do. The 'limp mode' kicks in to prevent damage to the vehicle when the computer gets data that something is wrong.. When you shut it off, it's temporarily reset, but then the cars computer is signaling there is still a problem, and it goes back into limp mode. If you have any questions after getting the codes 'read' , post questions and code #;s here for help. Good luck.

Posted on Apr 28, 2009

  • 56 Answers

SOURCE: f150 broke shift tube

Look under the car the linkage on the trans may have come off.

Posted on Jul 21, 2009

  • 11 Answers

SOURCE: limp mode on a automatic

Firstly, disconnect the battery and leave it for a few hours. Reconnect and try the car again. This resets the memory in the TCM. If the car picks up the faults again, it will go into limp mode again after a short while. If it's been a while since you changed the fluid, then put some seafoam transtune in to clean all the parts and plates. Then after a few days at least, preferably a week, go for a fluid and filter change. After this, you'll probably find it will go into limp mode again, just disconnect the battery again and reconnect after a few hours. I had the same problem in my chrysler T&C. I left seafoam in it for a week and it cleaned up all of the gum and varnish build up on the shift solenoid pack and plates.

If the problem persists, and after you find it allows you to change gears for a while and then goes into limp mode, it could be gummed up solenoid pack, or input speed sensor.

Go to o'reillys and plug in their diagnostic tool. It should provide you with the fault codes if any. If no codes, then your TCM and ECM are in good shape, and if you're lucky then it'll be something simple like a sensor, or solenoid. Try cleaning it first with seafoam transtune in the fluid for a week.

If all else fails, and their are fault codes, then take the car to a trusted transmission repair shop for a road test. The computer could be picking up slippage and making the car go into limp mode. This could be the clutch plates if no errors with the TCM, ECM are present, and you've ended up checking out the input speed sensor, and solenoid pack. The latter can cause hard shifting and slippage too, if the seed sensor is set to signal when to change gear, but the new oil, or old oil have made the friction slightly different to what it is used to or within factory limits. Firstly try reseting the TCM by disconnecting the battery for a while and see what happens.

Good luck

Posted on Jul 25, 2009

SOURCE: 1992 3000gt automatic stuck in limp mode,(3rd and rev.) HELP!

the car has the capablilites to give data and codes. You gunna need a professional if you dont have access to a scanner and multimeter. Otherwise were just guessing.
I hate telling people that its out of their hands but sometimes its best to let the pro diag it and then you can repair it if you capable

Posted on Nov 26, 2009

  • 462 Answers

SOURCE: added a bottle of diesel kleen to prevent smoking

You need to have the codes checked. The injectors in your engine have an issue where they either bypass fuel back to the tank or crack the body and fuel goes into the oil pan.

The warranty period goes to 200k miles, sorry I don't remember how many years, I think it was 7 years.

If you had a smoke problem before you used the kleaner you already have an injector problem.

Posted on Nov 26, 2009

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