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Old 06-08-2019, 01:05 PM   #1
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2014 Focus error code P0805

I bought my latest Focus used with about 51k miles on it. I've had it almost two months, almost 3k miles on it, no issues, until last night. Took a right turn at an intersection, started accelerating, and all of a sudden it felt like the clutch disengaged and the engine started revving wildly, up a bit over 4k RPM before I removed my foot from the gas. It calmed down and reengaged, but the CEL was on, and I drove a couple more miles and parked at my destination.

About an hour later I came back out and drove it home. CEL still on, and now the shifting started acting weird. Hesitating and then kinda lunging into gear on acceleration, and feels very funky deccelerating but totally fine when cruising with no gear changes.

Pulled codes this morning and got P0805, which is the clutch position sensor. Talked to my more car knowledgeable brother and he seemed to think just replacing this sensor would fix things. But from the additional research I've done, it sounds like that generic code, specifically for 2014 Fords, means it's something inside the TCM that's causing the problem. There are no other codes.

Just now I went outside to check it out again, and when I pushed the unlock button and it started its little power-up routine, I heard a bunch of weird clicking and not-quite-grinding noises coming from it. But the car still starts fine.

Can anyone offer some guidance on this? I know these models have had numerous issues with the dual clutch system, but I'm not sure if this is directly related to that or a side issue.


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Old 06-08-2019, 01:22 PM   #2
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Quote:
Originally Posted by Torchiest View Post
I bought my latest Focus used with about 51k miles on it. I've had it almost two months, almost 3k miles on it, no issues, until last night. Took a right turn at an intersection, started accelerating, and all of a sudden it felt like the clutch disengaged and the engine started revving wildly, up a bit over 4k RPM before I removed my foot from the gas. It calmed down and reengaged, but the CEL was on, and I drove a couple more miles and parked at my destination.

About an hour later I came back out and drove it home. CEL still on, and now the shifting started acting weird. Hesitating and then kinda lunging into gear on acceleration, and feels very funky deccelerating but totally fine when cruising with no gear changes.

Pulled codes this morning and got P0805, which is the clutch position sensor. Talked to my more car knowledgeable brother and he seemed to think just replacing this sensor would fix things. But from the additional research I've done, it sounds like that generic code, specifically for 2014 Fords, means it's something inside the TCM that's causing the problem. There are no other codes.

Just now I went outside to check it out again, and when I pushed the unlock button and it started its little power-up routine, I heard a bunch of weird clicking and not-quite-grinding noises coming from it. But the car still starts fine.

Can anyone offer some guidance on this? I know these models have had numerous issues with the dual clutch system, but I'm not sure if this is directly related to that or a side issue.
Check the battery voltage. Should be 12.65 volts on a good battery key off. No less. Running should be 13.6 to 14.3. No more no less.
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Old 06-08-2019, 08:42 PM   #3
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The voltage is fine. I'm going to take it to the dealer for service next week, as I think it should be covered under their extended TCM warranty.
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Old 06-10-2019, 04:43 PM   #4
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Quote:
Originally Posted by Torchiest View Post
I bought my latest Focus used with about 51k miles on it. I've had it almost two months, almost 3k miles on it, no issues, until last night. Took a right turn at an intersection, started accelerating, and all of a sudden it felt like the clutch disengaged and the engine started revving wildly, up a bit over 4k RPM before I removed my foot from the gas. It calmed down and reengaged, but the CEL was on, and I drove a couple more miles and parked at my destination.

About an hour later I came back out and drove it home. CEL still on, and now the shifting started acting weird. Hesitating and then kinda lunging into gear on acceleration, and feels very funky deccelerating but totally fine when cruising with no gear changes.

Pulled codes this morning and got P0805, which is the clutch position sensor. Talked to my more car knowledgeable brother and he seemed to think just replacing this sensor would fix things. But from the additional research I've done, it sounds like that generic code, specifically for 2014 Fords, means it's something inside the TCM that's causing the problem. There are no other codes.

Just now I went outside to check it out again, and when I pushed the unlock button and it started its little power-up routine, I heard a bunch of weird clicking and not-quite-grinding noises coming from it. But the car still starts fine.

Can anyone offer some guidance on this? I know these models have had numerous issues with the dual clutch system, but I'm not sure if this is directly related to that or a side issue.
My car is doing the same damn thing! It's actually the second time it has done it. Both times the problem went away on it's own. I took it to the ford dealer and the one dealer said the TCM warranty wont cover it because there are no TCM specific warranty codes. He said P0805 is not specific to the warranty. Said I would have to pay around 300 to have them check the transmission out. My fear is that they wont find anything. IF you take yours in please share as much info with me as possible so these people can't screw me over. My car is a 2012.
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Old 06-11-2019, 07:48 AM   #5
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Ok so I went to read about P0805 in the Focus manual and here's my findings:

According to the manual, the problem seem to be an electric problem and/or TCM problem.

You'll need to check the voltage of the clutch motor A. If it read above 5.2V, the circuit is open and need to be repaired (aka the wire is damaged). If it read below 5.2V, the resistance need to be checked. If it is below 5 ohm or above 10000 ohm, the TCM is the problem.

P0805
Clutch Position Sensor "A" Circuit
Clutch motor A fault detected.
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Old 06-11-2019, 07:52 AM   #6
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Originally Posted by civedm View Post
My car is doing the same damn thing! It's actually the second time it has done it. Both times the problem went away on it's own. I took it to the ford dealer and the one dealer said the TCM warranty wont cover it because there are no TCM specific warranty codes. He said P0805 is not specific to the warranty. Said I would have to pay around 300 to have them check the transmission out. My fear is that they wont find anything. IF you take yours in please share as much info with me as possible so these people can't screw me over. My car is a 2012.
That's weird. I did a bunch of research on this, and the document about the extended warranty specifically mentions that code as part of the coverage. I've got an appointment to drop it off tomorrow morning. I'll definitely update when I learn more.
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Old 06-11-2019, 07:50 PM   #7
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Its a TCM issue and should be covered

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Old 06-11-2019, 11:24 PM   #8
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I just checked my DTC and its 0850 not 0805. I got this DTC right after I was having the transmission issue.
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Old 06-11-2019, 11:26 PM   #9
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Screenshot of the DTC.
Attached Thumbnails
2014 Focus error code P0805-0528191258_1560313535066.jpg  

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Old 06-12-2019, 03:52 AM   #10
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Screenshot of the DTC.
Search the forum and got this ....

https://www.focusfanatics.com/forum/...they-mean.html



Sent from my SM-G960F using FF Mobile

Last edited by bayuap; 06-12-2019 at 03:57 AM.
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