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Old 03-12-2009, 10:01 AM   #1
drosado15
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Please Help - code P1506

Hey,

I have a 2001 Ford Focus Zx3.

I currently get a random Check Engine Light Pumping Out error code P1506. I have not found any leaks in the car. Now when the car is Idle in drive with the A/C on it gets really rough. Under 1,000 RPMS. Now im thinking its the EGR Valve or Mass Air Flow Sensor. Can anyone help thanks.


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Old 03-12-2009, 10:12 AM   #2
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DTC P1506 is set when the PCM detects the engine idle speed is greater than the desired rpm. This is most commonly caused by a dirty or bad IAC valve. Cleaning the throttle body will, most likely, cure this problem.
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Old 03-16-2009, 09:47 AM   #3
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I Cleaned the Throttle Body with Throttle Body Cleaner, Ran fine for about 2 hours then BAM Engine light again, Random Idle Up's and Downs. I was told to Clean the IAC but i cannot seem to find it. Do you recommend trying to clean it? I Was told its right under the Throttle body but i cannot find it?


Any other Help please?
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Old 03-16-2009, 04:38 PM   #4
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I Cleaned the Throttle Body with Throttle Body Cleaner, Ran fine for about 2 hours then BAM Engine light again, Random Idle Up's and Downs. I was told to Clean the IAC but i cannot seem to find it. Do you recommend trying to clean it? I Was told its right under the Throttle body but i cannot find it?


Any other Help please?

...Anyone?

I Want to get this resolved before i take this car on a 194 mile trip to the other side of Florida.
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Old 03-16-2009, 06:53 PM   #5
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The IAC valve is easiest to find with the [stock] intake duct removed (the one running from the air box to the throttle body). As you look from the front bumper, it's to the right of the intake manifold's centerline, sort of underneath one of the runners. From your DTC, I'd guess that the IAC valve has gone bad... but a tps will also trigger the same code if i remember right?
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Old 03-17-2009, 05:14 PM   #6
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The IAC valve is easiest to find with the [stock] intake duct removed (the one running from the air box to the throttle body). As you look from the front bumper, it's to the right of the intake manifold's centerline, sort of underneath one of the runners. From your DTC, I'd guess that the IAC valve has gone bad... but a tps will also trigger the same code if i remember right?
Alright i look for it on thrusday(By the time i get off of work its night so gotta wait till thrus) Any other suggestions from anyone else? Im going to be changing the AC Compressor soon as its starting to go.. But back on topic.... Any other People seen 1506 and resolved it ? Thanks.
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Old 03-17-2009, 05:45 PM   #7
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http://www.focusfanatics.com/forum/s...ad.php?t=77184

Try this...I'm looking for another thread..but i think this is the one that will help you with the IACV.

*edit*
This is the other i believe
http://www.focusfanatics.com/forum/s...highlight=IACV
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Old 03-17-2009, 10:09 PM   #8
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Im going to be changing the AC Compressor soon as its starting to go.
I'm seeing a correlation here. Clutch is cycling too often and dragging the engine down sporadically, by the time the computer adjusts the compressor has stopped and the idle jumps, cycle repeats.

I'd pull power to the A/C to see if they are interrelated or not and go from there.
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Old 03-18-2009, 06:58 AM   #9
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I'm seeing a correlation here. Clutch is cycling too often and dragging the engine down sporadically, by the time the computer adjusts the compressor has stopped and the idle jumps, cycle repeats.

I'd pull power to the A/C to see if they are interrelated or not and go from there.
hmm, Very possible never thought of that.

Well in April I'll be changing to Compressor for a total of $127.00 with a 1yr warranty from Advanced Auto. So maybe that will fix it =), Oh and also last night got a chance to pull tb and i still cannot find the SOB IAC
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Old 03-18-2009, 12:00 PM   #10
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The 2 little holes in this picture are where the IACV mounts to. basically straight under the TB and on the engine side of the intake manifold.

http://www.myece.com/focus/images/00-intake2.jpg
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