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2012 Edge Limited 3.5 - P0340, P0344 - I’m losing hope


Wood

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Coming up on about a year of trying to sort out what is wrong with my Edge.  Started out of the blue with a CEL that revealed a P0340 and P0344.  I did some google foo and started with replacing the Camshaft position sensor for bank 1.  This did not fix the issue so I began trouble shooting what I could and checking other resources.  Along the way I had the battery tested and replaced, and also now the alternator since I have seen Mustangs have issue with interference from the alternator affecting the CPS.  Just wrapped that up and 2 days later, CEL is back with the same codes.  

 

I don’t really know what else to do at this point.  I have decided I can no longer go around with this light on though.  I simply won’t.  I am going to sell the car if I can’t get it figured out.  I am not in the habit of ignoring dash lights and I am worried that I will miss a more pressing issue if I continue to leave it.  

 

Does anyone have any ideas?  I have search and searched and searched.  I have read every single post I can find about this and still I have nothing close to a solution.  What am I missing?  Please, any ideas will save me the thousands of dollars I am about to spend to sell and buy something else.

Edited by Wood
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I am just shy of 150K miles.  I bought the car with 105K and they had good service records.

 

I knew the sensor wasn’t likely the issue but it was the cheapest thing I could start with and I thought it was worth a try.  I couldn’t find anything wrong with the harness, but it’s hard to see parts of it.  I just need some fresh ideas of things I can test.  All I have access to is a multimeter and a code reader.

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you have mentioned codes, but not the actual symptoms.  some people mistake the cam sensors for the phasers, because ford calls them the exact same thing.  so the problem could be the sensors OR behind the main/timing cover.

 

check ford.oemdtc.com for these codes and any tsbs or recalls associated with them.  doesn't matter what model.  i have found this to be a valuable approach, because it enlightens you to the ford way of thinking/designing/diagnosing things.

 

you can search the web of course, i recommend justanswer.com as a good site for all kinds of great info.

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8 hours ago, WWWPerfA_ZN0W said:

you have mentioned codes, but not the actual symptoms.  some people mistake the cam sensors for the phasers, because ford calls them the exact same thing.  so the problem could be the sensors OR behind the main/timing cover.

 

check ford.oemdtc.com for these codes and any tsbs or recalls associated with them.  doesn't matter what model.  i have found this to be a valuable approach, because it enlightens you to the ford way of thinking/designing/diagnosing things.

 

you can search the web of course, i recommend justanswer.com as a good site for all kinds of great info.

 

Thank you for the recommendation.  I am going to check that site out now.  Like I said, I’m pretty much on my last straw now.  I really like the vehicle but this headache is just too much.

 

Symptoms have been the rough start of the vehicle in some circumstances.  I’m also seeing a drop in fuel economy and a loss of power when driving.  The car is still drivable it just doesn’t have the same power it normally does.  

Edited by Wood
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change plugs, clean maf sensor and tb at the very least.  i assume the fluids have been serviced recently?

 

check battery health.  not only voltage but cca's, with something like a solar ba9 or at an auto parts store.

 

run BG 44K fuel injector thru at least 1 preferably 2 tanks of fuel.

 

these are the simplest measures to take.

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I cleaned the TB last time when I pulled the CPS to check the connector.  I haven’t cleaned the MAF sensor for a while though.  I did plugs when I got the car, about 45K miles ago.  My thinking was that they should be fine but it is something to consider.  

 

Battery was replaced maybe 6 months ago due to a voltage drop.  It wasn’t having cranking issues but I replaced it since it was going to be needed soon and it was something my research showed as a potential cause of the CEL.  I guess the starter is also on that list.  

 

Has anyone on here had it be related to replacing the starter? 

 

I also should mention it’s intermittent.  First start of the day I get a CEL.  If I drive it around to the store and park when I come out it won’t throw the code.  I can pull the code and see it’s stored but has triggered the CEL yet.  Other times I pull the code and find out it’s gone. No pending codes, nothing.  Then it comes back on another drive.

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So basically, I’m hosed.  No one has a good option for sorting this out.  

 

Are there any other Ford Edge forums that might have some resources that I can check?  I’ve seen this topic come up here several times and it doesn’t get a lot of traction.  Seems like there aren’t many active people on here.  Maybe even another forum with the same motor that gets more traffic where I can find answers?  I really don’t want to give up on fixing this but I need a resolution or a new car.

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19 hours ago, WWWPerfA_ZN0W said:

sorry if this has already been asked, but what is the fluid change history? particularly coolant.

 

Although unusual, this may be pointing to a timing job in the future, but can't say for sure.

 

Coolant was flushed maybe 10K miles ago.

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18 hours ago, enigma-2 said:

PCM driver weak, harness broken or pinched, corrosion in connectors, phaser broken.

 

Thank you.  I have found a lot of information about the issue related to the 5.4L.  It’s hard to know which pieces apply to the 3.5, but I figure information is information.  Some of it may cross over so I have been reading it also.  Many seem to exhibit timing codes more often than the P0340 and P0344 I am seeing.  I may just have to set some time aside to pull the VVT solenoids.  Pain in the butt but oh well.  

 

I have seen reference to the codes I am seeing being attributed to a Crankshaft sensor error.  I haven’t seen anyone report that as a fix though for this issue.  Has anyone heard of that being confirmed as the issue?

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i would suggest you look through the Motorcraft OBD manual for 2012.  that may prompt an understanding of why these codes are set and what the possible resolutions are. 

https://www.motorcraftservice.com/freeresources/obd

 

An excerpt:

If the proper ratio of CMP events to PIP events is not being maintained (for example, 1 CMP edge for every 8 PIP
edges for an 8-cylinder engine), it indicates a missing or noisy CMP signal (P0340). On applications with Variable
Cam Timing (VCT), the CMP wheel has five teeth to provide the VCT system with more accurate camshaft control.
The microprocessor checks the CMP signal for an intermittent signal by looking for CMP edges where they would
not be expected to be. If an intermittent is detected, the VCT system is disabled and a P0344 (CMP Intermittent
Bank 1) or P0349 (CMP intermittent Bank 2) is set.

 

codes are not be-all/end-all diagnostics.  often they can be the starting link in a chain of events that when followed, leads to the true culprits.  with that mindset, you can probably resolve this issue.

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18 hours ago, WWWPerfA_ZN0W said:

i would suggest you look through the Motorcraft OBD manual for 2012.  that may prompt an understanding of why these codes are set and what the possible resolutions are. 

https://www.motorcraftservice.com/freeresources/obd

 

An excerpt:

If the proper ratio of CMP events to PIP events is not being maintained (for example, 1 CMP edge for every 8 PIP
edges for an 8-cylinder engine), it indicates a missing or noisy CMP signal (P0340). On applications with Variable
Cam Timing (VCT), the CMP wheel has five teeth to provide the VCT system with more accurate camshaft control.
The microprocessor checks the CMP signal for an intermittent signal by looking for CMP edges where they would
not be expected to be. If an intermittent is detected, the VCT system is disabled and a P0344 (CMP Intermittent
Bank 1) or P0349 (CMP intermittent Bank 2) is set.

 

codes are not be-all/end-all diagnostics.  often they can be the starting link in a chain of events that when followed, leads to the true culprits.  with that mindset, you can probably resolve this issue.

That is a great resource, thank you so much!

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  • 2 weeks later...

I wanted to follow up on this issue.  After doing some more trouble shooting and reading through the information that WWWPerfA posted I was able to narrow it down to the VCT sensor.  $30 later and it’s good to go.  Thank you, thank you, thank you!  I really appreciate the tips and ideas from everyone.  I needed it.

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  • 2 weeks later...

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