Ford

Have Ford questions? Ask a mechanic for answers ASAP

Connect one-on-one with {0} who will answer your question

This answer was rated:

Have a 2004 Ford F-150 FX4 5.4 L with check engine errror…

Have a 2004 Ford...

Have a 2004 Ford F-150 FX4 5.4 L with check engine errror code P0340 its also making a little rattling sound at idle

Mechanic's Assistant: Where exactly do you think the noise is coming from? And how long has this been going on?

Just stated a few days ago, the sound was louder under accelleration and lower at highway speed. the sound then quieted some and the check engine light came on

Mechanic's Assistant: Are you fixing your F150 yourself? What have you tried so far?

The only thing I have doe is to have the error code read. I was thinking about replacing the camshaft sensor

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

No, I am looking for a recomendation if this is something i Can fix or should take to a repair shop or dealer

Show More
Show Less
Ask Your Own Ford Question
Customer reply replied 4 years ago
Vehicle has 89000 miles and runs Mobil 1 synthetic oil since 26000 miles
Answered in 30 minutes by:
4/23/2018
Ford Mechanic: mechanic110, Auto Technician replied 4 years ago
mechanic110
mechanic110, Auto Technician
Category: Ford
Satisfied Customers: 138
Experience: Over 20 years of expirience working on Ford cars and trucks
Verified

Hello and welcome to our site. My name is***** to hear that you are having an issue with your 2004 F-150.

There are a few things that can cause your code.

1 Faulty sensor

2 Defective powertrain control module (PCM)

3 Wiring problem between the sensor and PCM.

4 Mechanical failure.

I would take this to a shop and let them diagnose this issue. I'm just being upfront. You could get by with replacing the sensor but most of the time there is another issue as to why the sensor went bad as I listed above. You don't have to take this to a dealer. An independent shop that is equipped with a Snap On scan tool and either Alldata or Mitchell wiring diagrams and diagnostics will be capable of handling this for you. I tend to stay away from dealers if possible just for the fact that they need a certain quota each month. But that's your call.

Also let them diagnose the rattling sound first to make sure there isn't a major issue going on. I doubt there will be anything major with only 89000 miles on it and running synthetic oil.

Take Care

Steve

mechanic110
mechanic110, Auto Technician
Category: Ford
Satisfied Customers: 138
Experience: Over 20 years of expirience working on Ford cars and trucks
Verified
mechanic110 and 87 other Ford Specialists are ready to help you
Ask your own question now
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a ford mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask mechanic110 Your Own Question
mechanic110
mechanic110
mechanic110, Auto Technician
Category: Ford
Satisfied Customers: 138
138 Satisfied Customers
Experience: Over 20 years of expirience working on Ford cars and trucks

mechanic110 is online now

Related Ford Questions
2004 Ford F-150 FX4 5.4 l I have changed all spark plugs and
2004 Ford F-150 FX4 5.4 l I have changed all spark plugs and coils, and mass air flow sensor, fuel filter, fixed vacuum leaks, and new upper throttle body still coming up with two error codes for bank… read more
CaseyA925
CaseyA925
2,638 satisfied customers
2004 F150 5.4 Triton 3V. Rough idle after decelerating when
2004 F150 5.4 Triton 3V. Rough idle after decelerating when towing...sound like a diesel. … read more
Ray M.
Ray M.
Diesel Technician
Vocational, Technical or Trade School
3,101 satisfied customers
I have a 2004 Ford F-150 5.4 3V (8th digit 5) with DTG codes
I have a 2004 Ford F-150 5.4 3V (8th digit 5) with DTG codes P0022,P0340, and P0345. it has a no crank condition with 190,219 miles. What to do?… read more
sprinkles08
sprinkles08
Technician
High School or GED
19,946 satisfied customers
My battery..stop light to a stop sign it idles low and usually dies
My battery recently died and I had it replaced. After that my a/c has been blowing warm most of the time and when I come to a stop light to a stop sign it idles low and usually dies. It seems fine whe… read more
JacobTD
JacobTD
Diagnose Specialist
Master
1,137 satisfied customers
2004 F-150 FX4: troble code..camshaft sensors and both vct solinoids
I have a 2004 F-150 FX4. I am getting a troble code of p0012. I have replaced both camshaft sensors and both vct solinoids. It is running like it is slightly out of time. What else could be the proble… read more
rpmdiag
rpmdiag
High school
10,672 satisfied customers
2008 Ford F- 150: cylinder..accelerating..clicking sound.Loud..idling
Just purchased a 2008 Ford F- 150, with an 8 cylinder 5.4 L Triton engine.While staritng and accelerating it makes a clicking sound.Loud at first, then becomes quieter.Not heard when idling or maintai… read more
davehop
davehop
Diagnostic Technician
Senior Master Ford Tech. Hyundai Master Technician
1,871 satisfied customers
2004 f-150: triton..2000 rpm..stutters..camshaft position sensor code
2004 f-150 5.4 triton v8 engine makes noise only between 1200 and 2000 rpm. also stutters a little between this range.had a camshaft position sensor code , changed sensor, no more code but still have … read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
11,778 satisfied customers
2004 Ford F150: with a 5.4L V8..four codes come up...cam position
I have a 2004 Ford F150 with a 5.4L V8. I had four codes come up. I have changed the cam position sensors and it is running better. I still have an engine knock at random times. I think it could be a … read more
RJ
RJ
Ford Tech
High School or GED
1,573 satisfied customers
2004 F-150 FX4: 5.4 liter engine..oil filter..drained..114,000 miles
I have a 2004 F-150 FX4, 5.4 liter engine. I have been using Amsoil 5W-20 oil and filters since its been new. Sometimes when you start the truck it sounds like the oil filter has drained off and rattl… read more
Ted G.
Ted G.
Owner
Vocational, Technical or Trade Scho
5,692 satisfied customers
2004 f150: camshaft..check engine light is staying..highway..cylinders
2004 f150, 5.4 litre i have a code that says faulty camshaft positioner sensor,i changed it out still have the same problem . the check engine light is staying on,had the codes cleared. it runs on the… read more
Paul M ASE Master
Paul M ASE Master
Automotive College
8,477 satisfied customers
2004 f-150: / the 5.4 triton engine w/ 98k on it..warm..diesel
I just bought a 2004 f-150 w/ the 5.4 triton engine w/ 98k on it. At idle (when warm) it almost sonds like a quiet diesel. When I drive I cannot heart it. Is it the VCT?? The dealer I bought it from s… read more
Earl
Earl
Technician
Vocational, Technical or Trade Scho
725 satisfied customers
2004 f-150: fx4..a hard shift in the transmission..somewhere..loud
I have a 2004 f-150 5.4 auto fx4 for little over a year and I have all the common service worked done to it but when you drive the truck it seems to have a hard shift in the transmission and when you … read more
Dieseljunky2
Dieseljunky2
Locomotive Mechanic
Ford Certified Technician
3,612 satisfied customers
2004 f-150: fx4..deisel has a bad low end knock and the truck
why does the lower end of my 2004 f-150 5.4 fx4 new bady stlye sound like a deisel has a bad low end knock and the truck only has 54145 miles… read more
EMRSR
EMRSR
High School or GED
3,002 satisfied customers
5.4 liter 3-valve engines have valvetrain problems..000 miles
Do 5.4 liter 3-valve engines have valvetrain problems? I think I have a bad lifter(s) after only 80,000 miles.… read more
EMRSR
EMRSR
High School or GED
3,002 satisfied customers
2005 f-150: with a 5.4 motor in it..make a ticking noise on left side
I have a 2005 f-150 with a 5.4 motor in it. It is make a ticking noise on left side of motor. what can cause this problem Rob… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
27,581 satisfied customers
2005 F-150 FX4: 06..ve changed..synthetic..K&N..air filter
I have a 2005 F-150 FX4 that I purchased used in 06 with 26000 miles. It now has 106000 miles. I've changed the oil with Amsoil synthetic every 20000 since I've owned it, and I've been using a K&N air… read more
HDGENE
HDGENE
11,216 satisfied customers
2004 f150 fx4: noise like the valves are tapping complained
I have an 2004 f150 fx4 the engine make a noise like the valves are tapping complained to the dealer about 4 times. What should i do?… read more
lostrider
lostrider
lead technician/working shop foreman
Vocational, Technical or Trade Scho
3,074 satisfied customers
2004 ford F-150: FX4..How large in weight, in a fifth Wheel can I pull
I have a 2004 ford F-150 5.4 L FX4 Super crew. How large in weight, in a fifth Wheel can I pull saftely… read more
Bob
Bob
Vocational, Technical or Trade Scho
2,784 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on.

Rich DUSA

Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me.

MollyUSA

I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service.

Jason V.Kirkland, WA

I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there.

BRNew Jersey

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

< Previous | Next >

Meet the Experts:

Ron

Ron

ASE Certified Technician

27,581 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Ford Technician

36,247 satisfied customers

24 years of experience diagnosing & repairing

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Mike V.

Mike V.

Auto Service Technician

3,021 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

Richard

Richard

ASE Certified Technician

1,558 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

Cam

Cam

Journeyman Automotive Technician

12 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

< Previous | Next >

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x