Got a P0340 CEL code what to do

[2k05gt]

I was driving home today and I got a check engine light so I pluged in my SCT tuner to read the DTC codes is says P0340 so I looked it up and it says P0340 Camshaft Position Sensor "A" Circuit" Anyone have a clue what this is ??? MODS Steeda UD Pullies JLT II CAI 62MM TB SCT Tune

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[2k05gt]

Any Ideas, If I take it to the dealer, will I need to install the Stock Tune, Uninstall the UD pullies, and replace the CAI with stock?

I read about this problem on the F150's and ford is replacing the engines and thoughts ??????

[CrimeScene]

Does "You screwed yourself out of a warrenty fix" mean anything,I seen a few post that people have said Ford will know you flashed or changed stuff in your computer no matter what you do,be a bummer if something major and they won't cover it becuse of a few minor mods,you may have just voided any engine warrenty you have now.

Hope not.

CrimeScene

[hawgman]

ORIGINAL: CrimeScene

Does "You screwed yourself out of a warrenty fix" mean anything.

Well nothing like instilling unnecessary paranoia over something you know nothing about now is there.....



06-02-09 2004-2006 MULTIPLE VEHICLES - DTC P0340/P0344/P0345/P0349 - 4.6L 3V AND 5.4L 3V
SOME 2005-2006 F-SUPER DUTY AND EXPEDITION/ NAVIGATOR AND 2004-2005 F-150, EQUIPPED WITH 5.4L 3V ENGINE, AND 2005-2006 MUSTANG GT VEHICLES, EQUIPPED WITH 4.6L 3V ENGINE, MAY EXHIBIT A DIAGNOSTIC TROUBLE CODE (DTC) P0340 AND/ OR P0344; OR 2006 EXPLORER 4DR/ MOUNTAINEER EQUIPPED WITH A 4.6L 3V ENGINE MAY EXHIBIT A DTC P0345 AND/ OR P0349. THIS MAY BE DUE TO A MALFUNCTIONING DIODE OR OPEN PHASE CONNECTION IN THE GENERATOR. PERFORM A GENERATOR FREQUENCY TEST TO DIAGNOSE CAUSE OF CONCERN. DO NOT REPLACE THE GENERATOR UNLESS A FREQUENCY TEST INDICATES A FAULT. THIS TSB PROVIDES STEP-BY-STEP DIRECTION FOR PERFORMING A GENERATOR FREQUENCY TEST USING THE WDS OSCILLOSCOPE FUNCTION.
See TSB for complete details
EFFECTIVE DATE: 01/20/2006

Printable View (128 KB) TSB
06-2-9
DTC P0340/P0344/P0345/P0349 - 4.6L 3V AND 5.4L 3V
Publication Date: January 19, 2006
FORD:
2005-2006 Mustang
2004-2005 F-150
2005-2006 Expedition, F-Super Duty
2006 ExplorerLINCOLN:
2005-2006 NavigatorMERCURY:
2006 Mountaineer


This article supersedes TSB 05-23-17 to update the vehicle line coverage. ISSUE:

Some 2005-2006 F-Super Duty and Expedition/Navigator and 2004-2005 F-150 vehicles, equipped with 5.4L 3V engine, and 2005-2006 Mustang GT vehicles, equipped with 4.6L 3V engine, may exhibit a diagnostic trouble code (DTC) P0340 and/or P0344; or 2006 Explorer 4dr/Mountaineer equipped with a 4.6L 3V engine may exhibit a (DTC) P0345 and/or P0349. This may be due to a malfunctioning diode or open phase connection in the generator.
ACTION:

Perform a generator frequency test to diagnose cause of concern. Do not replace the generator unless a frequency test indicates a fault. This TSB provides step-by-step directions for performing a generator frequency test using the WDS oscilloscope function.
SERVICE PROCEDURE



NOTE:USING THE OSCILLOSCOPE TO MEASURE PEAK-TO-PEAK VOLTAGE IS NOT A GOOD INDICATOR OF A FAULTY GENERATOR.

NOTE:ENSURE THERE IS NO BATTERY CHARGER CONNECTED TO THE VEHICLE.
Ensure the connections to the battery terminals, engine grounds, and generator B+ are clean and secure.
Attach WDS battery cable clamps to battery/battery cables.
Turn on WDS.
Select the Toolbox Icon, (upper left of WDS screen).
Select Oscilloscope and then click OK.
Select Channel 1, Auto, Generator Ripple.
Select Calculations, Channel 1, Frequency.
Select Calculations again.
Push the RUN/STOP button. A waveform should display on the screen.
Start the vehicle and leave at idle (engine speed less than 800 RPM).
Turn on vehicle loads (high beams, blower set on high, heated seats, defroster, etc).
Examine the frequency reading on WDS.
NOTE:WDS CAN CALCULATE THE FREQUENCY AUTOMATICALLY. THE CALCULATED FREQUENCY IS LOCATED ON THE LOWER LEFT AREA OF THE OSCILLOSCOPE SCREEN. SOMETIMES THE FREQUENCY CANNOT BE CALCULATED BECAUSE THE WDS CANNOT RECOGNIZE AND MEASURE PEAK VALUES. IF THE WDS CANNOT CALCULATE THE FREQUENCY, IT WILL DISPLAY "INVALID" WHERE THE FREQUENCY READING SHOULD BE. THIS IS NORMAL IF THE RIPPLE VOLTAGE IS TOO LOW.
For a proper visible wave pattern, adjust the voltage scale and time scale until a good wave pattern is visible. Typically, a setting of 1mS/div and 100mV/div is a good starting point and can be adjusted as necessary.
Run vehicle until signal is steady. Then select the "RUN/STOP" button to freeze the waveform.
Determine if the generator is faulty based on frequency measurement:
NOTE:FREQUENCY IS DEPENDENT ON ENGINE RPM. PERFORM ALL TESTS AT IDLE OR FREQUENCY READINGS WILL BE INACCURATE.
Compare the WDS saved waveform to the sample waveforms in Figure 1. If measured ripple frequency is lower than 500 Hz, then generator is faulty and should be replaced. If generator is not faulty proceed to Step 16.
If frequency calculation cannot be made by WDS, it can be calculated manually. See MANUALLY CALCULATE FREQUENCY. If calculated ripple frequency is lower than 500 Hz, then generator is faulty and should be replaced. If generator is not faulty proceed to Step 16.
MANUALLY CALCULATE FREQUENCY
Count the number of complete voltage dips over a given range of divisions on the scope trace
Divide the number of voltage dips by the number of divisions to get the average voltage dips/division
Divide the value in Step 2 by the time scale (e.g. 1mS/div = .001 sec/division) to get frequency
NOTE:THIS METHOD OF CALCULATING FREQUENCY IS SLIGHTLY DIFFERENT THAN THE METHOD USED BY WDS, SO THE FREQUENCY MEASUREMENT VS. CALCULATED MAY BE SLIGHTLY DIFFERENT.
If the frequency test does not indicate a fault with the generator, proceed with normal Powertrain Controls/Emissions Diagnosis (PC/ED) diagnostics for the DTC. For F-Super Duty vehicles only, if the DTCs are still present after diagnostics, reprogram the powertrain control module (PCM) to the latest calibration using WDS release B38.11 and higher or B39.2 and higher. Calibration files may also be obtained at www.motorcraft.com. This new calibration is not included in the B39 CD. (DO NOT REPROGRAM EXPEDITION/NAVIGATOR, F-150, MUSTANG, OR EXPLORER/MOUNTAINEER).
PART NUMBERPART NAME5L7Z-10346-CAGenerator - Standard Duty - Expedition/Navigator5L7Z-10346-BAGenerator - Heavy Duty - Expedition/Navigator6L3Z-10346-AAGenerator - F-1506C3Z-10346-AAGenerator - F-Super Duty6R3Z-10346-DAGenerator - Mustang6L2Z-10346-AAGenerator - Explorer/Mountaineer

WARRANTY STATUS:

Eligible Under Provisions Of New Vehicle Limited Warranty Coverage
OPERATIONDESCRIPTIONTIME060209A2005-2006 Expedition/Navigator 5.4L 3V: Diagnose Generator Using WDS, If Generator Is Found Defective Replace Generator (Do Not Use With 10346A, 10200A)0.8 Hr.060209B2005-2006 Super Duty, 2004-2005 F150 5.4L 3V: Diagnose Generator Using WDS, If Generator Is Found Defective Replace Generator (Do Not Use With 10346A, 10200A)0.9 Hr.060209C2005-2006 Super Duty, 5.4L 3V: Diagnose Generator Using WDS, If Generator Is Found To Be Functioning Properly Reprogram The Powertrain Control Module (Do Not Use With 10346A, 10200A, 12650D, 12650D84)0.6 Hr.060209D2005-2006 Mustang 4.6L 3V: Diagnose Generator Using WDS, If Generator Is Found Defective Replace Generator (Do Not Use With 10346A, 10200A, 9926A, 12650D, 12650D84)0.8 Hr.060209E2006 Explorer/Mountaineer 4.6L 3V: Diagnose Generator Using WDS, If Generator Is Found Defective Replace Generator. (Do Not Use With 10346A, 10200A, 9926A, 12650D, 12650D84)1.1 Hrs.
DEALER CODING

BASIC PART NO.CONDITION CODE1034642

[Scooter80]

I think what Hawgman means is that Ford knows about the issue and knows it has nothing to do with your tune, or your UDP's. So, no, they should fix it with no questions asked. However, get the wrong dealer and they will argue with you about your UDP's causing the problem due to the slowing of the alternator. (Which as you read in Hawg's post is bullslick because they know it happens w/o UDP's) Just find a dealer who has a service manager who understands it is a Mustang and people like to play with Mustangs and they will take care of you. Hell, mine sells Saleens and installs Superchargers and they will still leave your factory warranty in-tact.

Bottom Line: No your upgrades don't effect this problem and, therefore your warranty. And if they say it does, tell 'em to kiss off and they'll never see your car again. Then go find a dealer who wants your business!

[CrimeScene]

I belive I said may have voided the warrenty.

All you guys slapping on mods and all kinds of after market stuff that was not installed by a Ford dealer are risking voiding parts of your warrenty,you can quote anything you want off Sema you had better look at what the says about what says.

It basicly says that they cannot void it if the part/mod did not do the damage,so here you are at a Dealer with engine codes and probloms and they see some S/C on it and they say we are going to void your warrenty becuse it was not installed or approved by Ford,ok now YOU have to prove it,not them YOU, was not S/C that did it, now you need a a lawyer and a good S/C shop to and GOD knows what elese to back up your claim how much would that cost?

You can't just go to diffrent dealer and think there going to fix it,all that info goes into a data base they look in before doing any work,guess what? It will be in there the your warrenty is voided,you can yell, cry, curse all you want they won't care.

I am not putting any modding down,heck I plan to do it but I am going to ask my dealer first and find out if it will or not,if it needs to be installed by them fine I will pay the xtra cash,if they say no I will wait till the warrenty runs out,part of the cost of the car is the warrenty,it's your money do what you want to do.

I used an S/C as an example

I am not saying this is what they will do but they can pull this crap on ya,there are tons of post on warrentys and some get away with it some don't,if you have the cash to replace an motor do what you want ,if not check into it before you go mod crazy.

CrimeScene

[Rallek]

I am currently having the same issue with my car. I pulled error codes P0340 & P0344.
I plan on leaving my UD Pullies and K&N CIA on the car, but flashing SCT back to stock.

Did the dealership fix the issue?

Does Ford honor TSBs even if the warrenty is gone? I have 54k on my car.

[rakkassan34]

I had the same code. Found out most of the time it's a bad alternator but it can also be a bad cam phaser. For me it was bad cam phaser

[Touring]

Just return everything back to stock if you can. even a k&n filter will leave the dealer looking for other mods. i dont think they can see the pullies but if you leave the intake on they will be looking for them. good luck

[06steeda]

Try disconnecting & reconnecting the connector on top of the cam covers, might just be loose. Happened to me when changing cam covers.