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Mycoln ls 2002 ls giving me obd2 code 1504 changed acv and i get same code

I cant find out why it keeps chowin that code . i changed the valve . but i clear the code and it comes back up quick

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Posted on Jan 02, 2017

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SOURCE: 1998 silverado misfire

Check for a vaccum leak at the intake. Frankster016

Posted on Oct 25, 2008

  • 235 Answers


it is down under the intake manifold. the intake manifold must be removed to get to it. this vehicle is known for developing a vacum leak in the elbow hose that connects to pcv valve, so ive done a few.

Posted on Feb 19, 2009

  • 16 Answers

SOURCE: 2002 miata ls driving @ 80 mph engine stalls dies

I would also check the fuel filter, if it is beginning to stop up the car will run fine at low speeds but run out of fuel at higher RPM's/Speeds.

Posted on May 10, 2009

  • 336 Answers

SOURCE: code p0400 keeps coming up after changing the egr valve and sol.

It may be that the passage to the exhaust is blocked also.

Posted on Aug 14, 2009

  • 32 Answers

SOURCE: obd2 code p0300 on mazda protege 2002

Just had one of these with a maxima, the code is multiple random misfire, when a misfire occurs, to start is do the basics, replace the plugs, check fuel pressure, clean throttle body, and coolant is topped up. also I have seen if the O2 sensor is not working correctly is can cause a misfire, you will need a scan tool to look at what the O2 sensor is doing, o rby back probing the sensor (don't damage the O2 sensor wires). If it wires replace them as well, if it has coils they usually dont give that code if one fails, it will pinpoint that a certain coil if one fals.

Posted on Oct 02, 2009

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1 Answer

I just had the transmission fluid and filter changed on my 2002 lincoln ls now the vehicle is overheating very quickly, what could be the problem?

Check for obd2 codes & see if the trans temp
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If you had the trans fluid then you got problems
& may have to change the trans solenoid pack
If your asking about the motor then it is a different
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So what are the trouble codes in the computer ?
Could be an idle speed control valve among other things.

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Ive replaced to 02 sensors and my chk engine light still is on, I cant get it smogged. I use high octane and got a scan tool to reset but the codes keep changing

Clear the codes by disconnecting the battery terminals for 5 minutes.You can also clear them with an OBD II scanner. don-ohio

Sep 11, 2011 | 2002 Lincoln LS

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My 2002 Lincoln LS v6 Lost Engine Power,Traction Control Light was flashing & ABS light Came on! ANY IDEA?

Had the same problem with my 2002 Lincoln LS, it was a bad wheel speed sensor. The right front wheel bearing had some play in it, so I had the hub assembly replaced. The hub assembly comes with a new wheel speed sensor attached. After I replaced the hub assmbly with sensor, the ABS and Traction Control lights went off. No problem since!

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1 Answer

Service engine light keeps coming on. Shows pressure sensor is bad ?

You have to have, all vehicle problems involving any
OBD2 light on the dash,checked out in a couple of
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Need the code to give you ideas
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If it is a transmission problem, I wouldn't even drive it.
I have owned a trans repair business and I own a 2004
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Have 2001 mercury sable LS changed plugs, wires, egr valve after the computer said it was egr valve. still have a bucking problem. what could it be?

Computers do not diagnose your vehicle
They do not tell you what is wrong or what
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Study OBD2 Systems

You just got an EGR Code,that
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I need to find the right side sparks in my linncoln ls 2002 v6. im doing a tuneup but i cant find 3 of the sparks , i think those are under the air pipes so do i have to remove all that to change the...

No such thing as Sparks

On a V6 Lincoln L/S--you will have to remove the intake manifold, to get to the valve cover and the 3 Plugs.

Also No TUNE-UP--that left 30 years ago,with the introduction of OBD1 (1980 thru1995) and OBD2 (1996 thru 2011)
There is NO Tuning or adjusting going on,on any vehicles, for the last 25 years.
Education and an Owners Manual will help All vehicles are computer controlled.

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Ylinders Misfiring

you have to give it a tune up!!! According to your computer one of your plugs is fouled up so bad it cant get spark. So go to autozone go buy plugs, wires. thats the cheapest way. but if you want to get better gas mileage and keep your car in good running condition get the cap and rotor, and pcv valve, and a fuel filter. This is what u replace in a true tuneup. but if your tight for money right now just do those plugs and wires.

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1 Answer

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You will need a OBD2 code reader, that will give you a "trouble code" then that will tell you what direction to look in, for the problem.

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