Possible throttle body problem, 2007 Mustang GT.

[wtd]

My fiancé has a 2007 Mustang GT with about 31,000 miles on it. Recently it started having a long crank when it sat overnight, and it was cold. After the first start it would start fine the rest of the day. I tested the battery on Sunday with two different battery testers and it tested bad on both. The battery was a Duralast Gold that was six years old. We replaced the battery on Monday with a Motorcraft from the dealer since it was cheaper than the parts store ones. This is where the issue began.

After hooking the new battery up and going to start it, it started right up but it was idling kind of rough, and the rpms were only between 6-700 rpms with no high idle like it usually does initially. We have replaced the battery on this car two other times in the past with no issues.

I tried reving it up but it had no throttle response. I tried to drive it with the same results. The wrench light came on and then the CEL as well as a message in the display about a tire pressure problem which had never come on prior to this.

I put my scanner on it, and it has three throttle body codes in the PCM as well as some No communication codes in the ABS and IP modules. There was also a tire pressure sensor error in the GEM module. Throttle body codes are P2104, P2111, and P2112.

We have an Alldata subscription for the car, so I followed the flow chart for the P2112 code, and the test checked out good and said to replace the throttle body. I tried resetting the codes with the scanner, but they come back as soon as you turn on the key. I reset the KAM with the scanner with no changes. I tried draining the capacitors by unhooking the negative battery cable and then using a jumper wire to the positive cable with no results. This is also supposed to basically be an idle relearn since the scanner doesn't have the provisions to do that function.

I always remove the negative battery cable first when removing a battery and always put the positive one on first when installing it so I didn't ground anything out. All of these problems have come on with the battery replacement except the long crank time which is still happening. The scanner shows that the fuel pressure is fine as well as the car is getting a rpm signal, so I don't think it's a crank sensor issue and I'm not getting any codes for that circuit.

Has anyone had a battery replacement cause issues with modules or components? Has anyone had a throttle body go out with such low miles?

We are leaning towards replacing the throttle body with a Ford Motorcraft one, but the communication codes have me kind of worried that something else is going on since there are no comm lines going to the TPS sensor or throttle motor.

 

[bdcardinal]

If you do go ahead with the throttle body, get the gasket also as it does not come with. 4R3Z-9E936-AA is your p/n for a 2007 Mustang GT. The p/n throttle body that I come up with 9R3Z-9E926-A isn't a fast mover for us, the last one sold in 2019, but there were a bunch of sales prior.

I quickly did some google-fu on the throttle reset, but people have all sorts of different procedures, and there isn't one in the WSM.

 

[wtd]

If you do go ahead with the throttle body, get the gasket also as it does not come with. 4R3Z-9E936-AA is your p/n for a 2007 Mustang GT. The p/n throttle body that I come up with 9R3Z-9E926-A isn't a fast mover for us, the last one sold in 2019, but there were a bunch of sales prior.

I quickly did some google-fu on the throttle reset, but people have all sorts of different procedures, and there isn't one in the WSM.

Thanks for the information. Those are also the part numbers that we came up with for her car.

The Alldata information also doesn't have a throttle relearn procedure. Fordtechmakuloco on YouTube is who I found for the information using the jumper wire to reset the throttle parameters. He is a former Ford tech with his own shop who is very knowledgeable about Ford vehicles.

I just hate replacing a part if I'm not totally sure if that is the problem. I know during my research that a lot of people fixed the throttle body codes with a new one, but the part is pretty expensive not to be sure. She is pretty much made up her mind to replace it, so we are going to order one and the gasket and see what happens.

 

[benjy]

my 2001 jetta + many other VAG vehicles had bad throttle bodies as there are sensors in them that are not repairable!! going to work it felt like a "broken throttle cable from the old days" car idled but stepping on the go pedal did NOTHING, so i got a flatbed "tow" there was a PILE of them on the floor at the STEALERS!!

 

[wtd]

my 2001 jetta + many other VAG vehicles had bad throttle bodies as there are sensors in them that are not repairable!! going to work it felt like a "broken throttle cable from the old days" car idled but stepping on the go pedal did NOTHING, so i got a flatbed "tow" there was a PILE of them on the floor at the STEALERS!!

Yes, same symptoms as this Mustang. It idles but will barely go. The bad thing is that it's a 5-speed manual so it barely has enough rpms to not kill it when trying to move it.

 

[wtd]

Update on the Mustang. A new throttle body seems to have fixed the problem. Car starts and runs normally with no CEL or wrench light. I cleared the codes and none of the previous codes are back. It just has a code for the monitors not being run which is from the battery being disconnected when I installed the new one. No more long crank either so that must have been part of the throttle body issue. We did install a Ford Motorcraft TB.