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2009 Ford Focus Transmission Light on and P0320 OBD II code


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Mindblone
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Dec 13, 2011, 7:04 PM

Post #1 of 21 (3933 views)
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2009 Ford Focus Transmission Light on and P0320 OBD II code Sign In

When I'm driving down the road at a cruise speed, the car will start cutting back (just like your in too high of a gear in a manual transmission car) and the transmission (wrench) light will come on, then shortly after that the engine light will come on throwing a P0320 code. Sometimes when driving when all this is happening it's like the fuel pump will just shut off killing the engine. I have to turn the key off then start the engine back up then the car runs fine for a few seconds then the process starts all over again. But what gets me is if the car is under a load (accelerating, or climbing a hill etc.) it does just fine. I'm completely clueless on this one. I've checked the spark plugs, coils, and crank sensor in reference to the P0320 code with no success. Does anyone have any suggestions? Unsure


(This post was edited by Hammer Time on Feb 5, 2012, 7:09 PM)


Discretesignals
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Dec 13, 2011, 7:11 PM

Post #2 of 21 (3926 views)
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Is this still under manufacture's warranty?





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Mindblone
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Dec 13, 2011, 7:17 PM

Post #3 of 21 (3921 views)
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Unfortunately, its not. its already at 72,352 miles. I bought it used and it had 52,864 miles on it. It's like as soon as it passed 60,000, ford flicked a switch and told it to start pissing me off!!!!! lol At one time the battery would go dead if it set more than 24 hrs. Well i replaced the battery, that didn't help. well after a few weeks that went away. Now the stereo in the car sometimes will not read a cd it just says "initializing". And it also will not sync to any cell phones like it did. Now all this with the transmission and engine is going on......


Mindblone
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Dec 13, 2011, 7:22 PM

Post #4 of 21 (3916 views)
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I also think it might be the speed sensor in the transmission, but i don't just want to start replacing parts you know. I figured posting on here I might run across somebody who has had this issue before.......


Discretesignals
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Dec 13, 2011, 7:37 PM

Post #5 of 21 (3890 views)
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The P0320 may give you clue as to what is happening. The engine computer needs to know the position and speed of the crankshaft in the engine. There is a sensor that monitors the crank called a permanent magnet reluctance position sensor or crankshaft position sensor. The sensor produces an alternating voltage signal that the engine computer uses to help determine the firing order and speed, so it knows when to inject fuel and produce spark in the firing order of the engine.

If that signal goes missing or becomes corrupt, it will cause the engine computer to stop firing the fuel injectors and ignition coil. The computer will set that P0320 code also. This may be why it feels as if the engine is shutting off.

The signal needs to be monitored with a oscilloscope to see if the signal is breaking up or getting interference from something inside the vehicle, such as a two way radio.

You can also inspect the wiring and connection at the sensor to be sure nothing visually look wrong. The crankshaft position sensor is down by the harmonic balancer on the front of the engine.







Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Dec 13, 2011, 7:42 PM)


Mindblone
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Dec 13, 2011, 7:43 PM

Post #6 of 21 (3882 views)
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I understand all that and i have checked the the crank sensor. But what is getting me is why the transmission light comes on first. I was told by someone that a transmission issue can also trigger that P0320 code. (Such as the speed sensor.)I am just completely clueless. Why can't they just go back to the olden days when nothing ever broke down.......


Discretesignals
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Dec 13, 2011, 7:52 PM

Post #7 of 21 (3872 views)
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Believe me in the old days stuff broke down too. If it moves or there is heat involved, it breaks.

How did you test the output of the crankshaft sensor? You can't tell by just looking at it with your eyes to say it is working or not.

I am sure the transmission side of the engine computer is going to need to know the speed of the engine, so it can determine slip rate of the torque converter. That may be why the light is going on.

You really should figure out why the P0320 is showing up before going after transmission components.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Dec 13, 2011, 7:55 PM)


Mindblone
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Dec 13, 2011, 7:53 PM

Post #8 of 21 (3868 views)
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Oh and i also forgot to mention that when the transmission light is on and you press the gas pedal to the floor the transmission shifts early. (4000rpm instead of 6200rpm)


Mindblone
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Dec 13, 2011, 8:04 PM

Post #9 of 21 (3864 views)
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this is how i checked the crank sensor......



http://www.youtube.com/watch?v=Pv6wqQAmXvc


Discretesignals
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Dec 13, 2011, 8:12 PM

Post #10 of 21 (3858 views)
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That test will only work when the crankshaft sensor is not producing any kind of signal what so ever and the engine won't start.

For intermittent problems, glitching, or interference issues you won't be able to test using that method. A scope needs to be connected to the crankshaft sensor circuit at the engine controller and monitored while the problem occurring.





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Mindblone
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Dec 13, 2011, 9:18 PM

Post #11 of 21 (3847 views)
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It's like as soon as it passed 60,000, ford flicked a switch and told it to start pissing me off!!!!!


I know a guy who is willing to check it out and do a full scan on it. I will update as soon as i get the results. Thanks for your help so far. It's greatly apreciated. Smile


Mindblone
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Dec 16, 2011, 10:01 AM

Post #12 of 21 (3811 views)
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Do you think should just replace the crank sensor? My local auto parts store said its a dealer item, but i found this site link deleted....not allowed


(This post was edited by Hammer Time on Dec 16, 2011, 10:52 AM)


Discretesignals
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Dec 16, 2011, 7:59 PM

Post #13 of 21 (3793 views)
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Like what was mentioned above hopefully your mechanic is able to watch the crank sensor signal with a scope and determine if it is the actual culprit or not. You could replace it if you can't get the sensor to glitch or fault out to see what happens if you don't mind spending $70.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Dec 16, 2011, 8:03 PM)


zmame
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Dec 17, 2011, 1:54 AM

Post #14 of 21 (3776 views)
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Do you have a 2 way radio installed in the vechical?
There is the slight possibility of interference and is advised to disconnect power and grount to the device(s) and re-verify problem before continuing on pinpoint tests.

If that is not your problem..
Since it's intermittent problem I would get a scope on the CKP and watch for problems with the CKP while monitoring the PCM on a scanner to determine if it's PCM ,CKP or related wiring problem. Since you probably don't have that equipment you will have to take it to a garage.


Mindblone
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Feb 5, 2012, 7:00 PM

Post #15 of 21 (3638 views)
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I replaced the crank censor and reset the computer on the car but the problem still exists. It has only gotten worse over time....... And i just noticed that the subject says 2010 Ford Focus, but its actually a 2009. When the car is idling, i can give it just a touch above idle and the engine misses and the transmission (wrench) light comes on. Not long after the engine light comes on. The car will be idling then all of a sudden just shut off, when I start the car back up it smells just the car is ran out of gas. I see no way of checking the fuel rail pressure. I am about to burn this car. lol


Discretesignals
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Feb 5, 2012, 11:03 PM

Post #16 of 21 (3625 views)
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Is that crank code still popping up?





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.


Mindblone
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Feb 6, 2012, 12:39 PM

Post #17 of 21 (3613 views)
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P0320 is still there. Now it idles for maybe 2 minutes then the engine shuts off. It smells just like the car ran out of gas.


Mindblone
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Feb 6, 2012, 3:05 PM

Post #18 of 21 (3604 views)
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I was told on another forum that the speed sensor in the transmission also sends a signal like the crank sensor. But they say theirs no way that it could be the problem. But, I just don't understand why the trans light is coming on while in park.


Mindblone
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Feb 6, 2012, 4:58 PM

Post #19 of 21 (3588 views)
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i have replaced the ckp sensor and i still get the p0320. And also just started getting p0607, and p061c.


Discretesignals
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Feb 6, 2012, 7:25 PM

Post #20 of 21 (3575 views)
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Are there any aftermarket performance products or has the PCM's software been altered?

If your still getting that P0320 code, you are going to need to get a scope and watch the crank sensor's PIP waveform at the PCM. It's either glitching, getting interference, or something flaky going on with the PCM. You have to determine if the signal is actually being lost, corrupted, or is good.

If the signal looks good at the PCM and your still having the stalling and code returning, it is probably going to be something going on with the PCM itself. You need to verify before replacing anything.

The P0607 means the CPU in the PCM has encountered an error. The chart states to troubleshoot any other codes first. If those other codes are resolved, then the software calibration needs reprogramming or updating. If the code reappears after all that, the PCM needs to be replaced.

P061c means there is a caculation error in the PCM. This code could be caused from the crank sensor problem that your getting. That is why the signal's intrigrity needs to be verified using a scope. If the signal is good, its possible the PCM needs replaced.

I am not going to tell you the PCM is the culprit even though some of those codes are pointing that way. It's important you verify the PCM is getting the correct input and has good power and grounds before replacing the PCM.





Since we volunteer our time and knowledge, we ask for you to please follow up when a problem is resolved.

(This post was edited by Discretesignals on Feb 6, 2012, 7:43 PM)


Mindblone
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Feb 7, 2012, 9:59 AM

Post #21 of 21 (3559 views)
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yea thats what im thinking. i am just gonna have to take it to the dealership. I will update as soon as i know. THX for everything......




2009 Ford Focus Transmission Light on and P0320 OBD II code


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