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Hybrid10

2010 fusion hybrid code P2112

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My 2010 fusion hybrid check engine light and wrench light came on at the sametime yesterday and before the light came on my car was acting really weird the Hybrid battery would stay in L barely wouldn't charge and when I try to give it gas it wouldn't go barely move. I had to pull over turn off and restart the car and then it would work back to normal. But I got ot scanned at AutoZone and I got the code P2112- throttle actuator control System-Stuck Closed. Failure is normally due to age and high mileage is what it says.. So I'm assuming all these issues will have to do with the throttle body My car has 176k miles on it. 

 

Long story short I ordered a brand new throttle body with the sensor of course the question I had is how do you relearn the throttle body in the Fusion Hybrid is it different than the gas version relearning process ?

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I had all the same alarming symptoms and codes, I fixed it for free, by cleaning out the throttle body.  There was a thread I left regarding this fix on this website including pictures, but it seems to be gone now.  The key is to clean the black carbon off, especially at the close to closed position, where it can get stuck.   Use a strong carb/TB cleaner, be sure it doesn't damage plastic or rubber parts, and use a flat cut popsicle stick to scrap with, to avoid damaging the aluminum TB inner diameter.   The throttle body can be removed very easily, it is accessible at the top, much easier than cleaning a carburetor,  back in the day...

 

It has been working fine for over 2 years since this cleaning.  

before-after 1.jpg

Edited by VonoreTn
more detail

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There's no TB relearning procedure, gas or hybrid.  What are you using as a reference to one?

 

See here, which would have been revealed via the 'Search' function.

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Thank you for the information I forgot to mention I did clean my throttle body six months ago it was really gunked up but I left it really clean and was careful when I was cleaning it to make sure I didn't damage. I think the throttle body sensor is messed up I'm going to end up replacing the whole unit since I recently cleaned it. Hopefully this resolves the issue today my check engine light turned off so weird. 

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On YouTube there's a guy that shows the relearn process on the Ford Fusions electric throttle body anytime you replace a throttle body I just didn't know if that affected the hybrid also or just the gas versions. He says it should be done anytime you change the throttle body or the battery has been disconnected which I recently replaced my battery few months ago. I was going to replace it because I recently cleaned it and it has 176k miles on it. And that's what the check engine light code gave me.

 

Edited by Hybrid10

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Yes, I've seen that.  I subscribe to his YouTube channel.   He called it ETB relearning but it's actually PCM relearning.  You'll notice that he erased the PCM's memory.  The PCM has to relearn idle and fuel trim settings.  The TB reacts to signals from the PCM.  It has no memory of its own.  The relearn procedure that he describes is in your owner's manual:

 

Quote
Because your vehicle’s engine is electronically-controlled by a computer, some engine control settings are maintained by power from the low-voltage battery. Some engine computer settings, like the idle trim and fuel trim strategy, optimize the driveability and performance of the engine. The clock and radio station presets are also maintained in memory by power from the low-voltage battery. These settings are erased when a technician disconnects and connects the low-voltage battery.
To restore the settings, do the following:
  1. Apply the parking brake.
  1. Shift into park (P) or neutral (N).
  1. Switch off all accessories.
  1. Press the brake pedal and start your vehicle.
  1. Run the engine until it reaches normal operating temperature. While the engine is warming up, complete the following: Reset the clock. See  General Information.  Reset the power windows bounce-back feature. See Windows and Mirrors.  Reset the radio station presets. See  General Information
  1. Allow the engine to idle for at least one minute.
  1. Drive the vehicle at least 16  km to completely relearn the idle trim and fuel trim strategy.

 

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12 hours ago, drolds1 said:

Yes, I've seen that.  I subscribe to his YouTube channel.   He called it ETB relearning but it's actually PCM relearning.  You'll notice that he erased the PCM's memory.  The PCM has to relearn idle and fuel trim settings.  The TB reacts to signals from the PCM.  It has no memory of its own.  The relearn procedure that he describes is in your owner's manual:

 

 

On YouTube there's a guy that shows the relearn process on the Ford Fusions electric throttle body anytime you replace a throttle body I just didn't know if that affected the hybrid also or just the gas versions. He says it should be done anytime you change the throttle body or the battery has been disconnected which I recently replaced my battery few months ago.

Yea that makes sense. Thanks for the info. So it looks like i dont have to do anything if i wont be disconnecting the battery when installing the new oem throttle body. I did put a new battery in myself back in June I never did any of these procedures though car seems to run fine sometimes a little rough/laggy when I take off from a light that's about it.

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It's not a bad idea to disconnect the battery when you replace the TB.

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