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Old 06-11-2011, 04:44 PM
02rangertony 02rangertony is offline
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Default check engine light.. code p1520

anybody get this code and repaired it? it says intake manifold runner circuit failure... i think its a common problem
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Old 06-12-2011, 01:38 PM
Huck Huck is offline
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Default Re: check engine light.. code p1520

I've never heard of the code. I will have to make some calls to see what it is.
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Old 06-12-2011, 01:46 PM
02rangertony 02rangertony is offline
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Default Re: check engine light.. code p1520

it also says detected a shorted or open condition in the imrc circuit and the last one says open or shorted electrical condition
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Old 06-12-2011, 02:35 PM
littleblue littleblue is offline
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Default Re: check engine light.. code p1520

Here is the trouble code chart for P1520:

Code: P1520
Application: All
Key On Engine Off: GO to HU15
Key On Engine On: GO to HU15
Continuious Memory: GO to HU15

The diagnostic chart for HU15 is:

HU15 DTCS P1516, P1517, P1518, P1519, P1520, P1537, P1538 VISUAL INSPECTION
Note: Refer to the PCM connector pin numbers in the beginning of the pinpoint test.

View linkage or cable routing. Check for any binding or improper routing. Cable core wire (if applicable) at IMRC(Inlet Manifold Runner Control)/IMSC housing attachment must have slack and lever must contact close plate stop screw. For Focus, Escort, 2.3L Ranger and 4.2L E/F Series, a visual inspection may not be appropriate. GO to HU17 . Refer to the IMRC/IMSC system description in Section 1 , Intake Air and Throttle Body, for illustrations.

Note: The IMRC/IMSC return springs are strong. Make sure the return springs operate properly and plates open and close fully. On vacuum operated systems engine must run for 20 seconds to restore vacuum then return to KOEO for testing.

Manually open and close IMRC/IMSC plates at intake manifold and feel for sticking/binding.

If a condition is indicated it says go to HU16 and if no go to HU17. It continues on and on. If you need the info send me a pm with your email and I'll copy the file and send it to you.

There was no description for the P1520 code listed on the Ford CD, only the diagnostic chart.

P1519 is Inlet Manifold Runner Control Malfunction (Stuck Closed).
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Last edited by littleblue; 06-12-2011 at 02:39 PM.
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