Mechanics

SERVICE ENGINE SOON - CODES

2003 Ford Taurus

Engine Performance problem
2003 Ford Taurus 6 cyl Front Wheel Drive Automatic 78,000 miles

December 16, 2008

Dear Sir or Ms:

My wife's 2003 Ford Taurus had the Check Engine Light come on yesterday. I took the car to " Autozone" Auto Parts today and they plugged in their Scanner and checked the Diagnostic Codes for FREE.

It came up with two codes: P0306 and P0316. Autozone printed me out a couple of receipts which had more details on them.

For P0306 it said that there was a misfire that occurred in cylinder # 6. The powertrain control module monitors the crankshaft speed and has detected a misfire condition. Probable causes are: Faulty Spark Plugs, Ignition Wires, or Coil. Vacuum Leak, Injector Fault, or High or Low Fuel Pressure.

For P0316 it said Crankshaft Condition. Probable Cause: Crank Sensor Defective; Check Connector and Wiring to Sensor; Check Trigger Wheel for Damage.

Next I stopped in at a local Auto Repair place and talked with the Head Mechanic. He told me that you can't go by the slips that Autozone provided because they just want to sell parts.

The Mechanic said that I should bring the car in for him to connect to his scanner at $69.99 to pin-point the actual problem.

He said if I actually needed a Tune-up it would cost approximately $180. On top of the $69.99 Scanner price. Other parts for the Crankshaft Sensor would be extra.

I went home and followed the advice from the guy at Autozone; who told me to disconnect my Negative Battery Cable to Eliminate the Service Engine Soon light. That actually worked. I tried turning the car on and off twice and the light did not reappear. Although I did not take the car out for a drive.

Questions:

1) By disconnecting the Negative Battery Cable, did that also remove the P0306 and P0316 Error Codes from the computer in my car? I do live in Ohio where at this time of year it is either Raining or Snowing. Could the Moisture in the air have caused a glitch to cause the Light to come on and the codes to appear?

2) If the Service Engine Soon light does come back on; what steps should I take? Should I get the Scan from the Mechanic, or should I just get the Tune-up and take a chance that it will fix the problem? Money is very tight and scarce right now, as I am unemployed and just receiving Unemployment checks which doesn't even pay all the bills.

3) The Mechanic said that I shouldn't drive the car if the Check Engine Soon light is on because it can damage the Catylitic Convertor. Is this True? Although I think I need exhaust work anyhow because I am getting exhaust fumes coming into the car. Another expense later in time, hopefully when I get another job.

OK, your responses and advice would be appreciated. Sorry, since I am unemployed I can not afford to donate any money for a response.

Thank-you.

Alan514
Avatar
Alan514
December 16, 2008.



Firstly. If your mechanic plugs the car into his computer he will only get the same codes as autozone did. So he will only replace the parts autozone have told you about. The crank sensor. The misfire code would come from the crank sensor fault. So they are basically the same fault one repair would fix both. It could be the wiring on the crank sensor got damp due to weather conditions and this caused the CEL to come on. If the light has not come back on after you drive it around for a while I would blame it on the wiring and look into that first if it does come back on? Removing the battery cables reset's your engines computer memory. If the fault re-appears go back to autozone to get code to check it is the same codes and re-post to us and I will talk you through replacing crank sensor. Its an easy repair with basic tool kit? Or you could just ask your mechanic to check the wiring and/or replace the sensor?

Dave H
Dec 16, 2008.
December 16, 2008

To: Dave H.

Thanks Dave, for your quick response. Sounds like you are sure that if there is a problem it probably is the Crank Sensor or the wiring leading to the Crank Sensor. Just where the heck is this Crank Sensor located at anyhow?

This is the first that I even heard there was such a thing. I tell you, these newer cars are garbage. I wish they would build car back like they did in the 1960's. I am 54 years old and I used to work on cars when I was younger, but pretty much gave that up when they started making cars so complicated.

As I said in my original posting - I am unemployed and my unemployment checks don't even pay all of my bills. As a result I am behind on everything. I am at the point where I am going to have my other car, a 2007 Pontiac Grand-Prix GT Reposessed by the bank and I will have to depend on this 2003 Ford Taurus that I am having trouble with for going on job interviews and also for getting to work when I do get a new job. Plus in the County where I live in Ohio I am required to have this car's emmissions checked coming up in January 2009. So I need this car running with no Engine Check Lights or Codes in a hurry.

Again, Thanks for your Response.

Best Regards; Alan514

Tiny
Alan514
Dec 16, 2008.
December 16, 2008

To: Dave H.

One other thing.

When the Mechanic told me he was going to connect the car to a Scanner, I thoght he meant a different kind of scanner or Diagnostic Electronic Computer where you connect leads to places on the motor to get readings, and not just plugging in a metter to the connector under the dashboard.

Alan514

Tiny
Alan514
Dec 16, 2008.
All new cars are controlled by a PCM (computer) every vehicle nowadays tells you where the fault lies by plugging in under the dash ... he won't do any more the autozone did ?? I would be checking the wires to it first before replacing .. but as you can see it's an easy replacement part .. DIY job .. this picture is from a 3.0L 2V let me know which engine you have for another picture .. let me know

Crankshaft Position (CKP) Sensor (3.0L 2V)On lower right front of engine. See Fig. 1 .
Crankshaft Position (CKP) Sensor (3.0L 2V FFV)On lower right front of engine.
Crankshaft Position (CKP) Sensor (3.0L 4V)On lower right front of engine. See Fig. 5 .


http://www.2carpros.com/forum/automotive_pictures/266999_ckp_3.jpg


Dave H
Dec 16, 2008.
December 16, 2008

To: Dave H.

Wow, Pictures!

I actually do not know which of those model Ford Taurus' that I have. I know there are no FFV signs on the Fender or Trunk Lid advertising alternate Fuel.

I am sure that it has a 3.0 Liter engine sitting sideways in the engine bay. I am guessing the 2V and 4V designates how many Valves per cyclinder? It is not a " SHO" Model; so I would have to guess it is the 3.0 2V model.

It does have bucket seats and the Automatic Transmission Shifter in the Center Console.

I tried looking on stickers at the front of the engine bay and inside the driver's door, but I didn't see anything that told me anything relative.

I did open the engine bay and standing by the front passenger side fender I saw some electic wiring and a plastic connector hanging down just to the left of the Serpentine Belt that runs to the alternator and other places.

I couldn't hardly get my hand down in there to even touch it, let alone check connections or change anything. It looks like you would have to practically lift the motor out or drill a hole through the inner fender well to get to it. With it hanging so low to the bottom of the engine I can see why it would get a lot of water on it splashed up from the road.

So, I saw this stuff hanging there to the left of the Serpentine Belt, but not knowing what a Crank Sensor looks like, I am not positive about it. Is the Crank Sensor just something that plugs into a wiring harness, or do you have to un-bolt something from the engine?

Thanks for all your help.

Best Regards; Alan514

Tiny
Alan514
Dec 16, 2008.
The actual sensor is where my arrow is pointing .. it just bolts on with one bolt .. unplug the connector that the other arrow points at ..as you can see the connector goes onto CKP


http://www.2carpros.com/forum/automotive_pictures/266999_ckp2_1.jpg


Dave H
Dec 16, 2008.
This is a picture of the 3.0L 4V .. it also gives you a better idea of where the CKP is actually located ... it sit's almost connecting to the crank pulley ??


http://www.2carpros.com/forum/automotive_pictures/266999_30L_1.jpg


Dave H
Dec 16, 2008.
December 16, 2008

To: Dave H.

Thanks Dave. It's dark out there now, but tomorrow I'll have to take a better look at it. Perhaps if I pull the car up on a set of ramps and then crawl underneath, I can then get a good look at it and an idea if I want to try tackling the job myself or not.

You don't happen to know what a Crank Sensor might cost me do you? $20? $50? $100?

I did call that Mechanic up that I talked to earlier to ask him how much it would cost to replace the Crank Sensor. He told me $100. With Labor. Not too bad, but if I can do it a lot cheaper myself, I'm all for that.

Thanks again for your help.

Best Regards from Akron, Ohio

Alan514

Tiny
Alan514
Dec 16, 2008.
Trust me when you see it. You will do it yourself. It's one bolt and unclip the wire's. Because of where it is, it may just need a good cleaning and check of the wires.?

OEM dealer(ford) part price is $45.00. You can probably get it a lot cheaper at autozone.

Book time for labor is 1 hour?

Hope this helps. If I helped feedback is alway's appreciated

Dave H
Dec 16, 2008.
December 16, 2008

To: Dave H.

It will all probably depend on the weather, because I will have to try to do this outside. The weatherman said we have a big storm coming our way.

Thanks Big Time Dave for all the excellent help.

I did try to give you some feedback points, but they said I only had 0.2 points to give. When I typed that in, they said why are you trying to enter Zero. When I removed the Zero and just entered.2, they still asked, why are you trying to enter Zero. But I may try it again though.

Best Regards; Alan514

Tiny
Alan514
Dec 16, 2008.
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