2004 Ford F150 Emission Failture

2004 FORD F-150
65,000 MILES • V8 • 2WD • AUTOMATIC
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ROGERSAGR
  • MEMBER
  • 2 POSTS
Received the following error from the emissions test:

RPM=0652
P0506 Idel Control System RPM Lower Than expected
What part is needed to fix this problem?

Thanks-in-Advance, Gene
Jul 17, 2008 at 9:30 AM
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BMRFIXIT
  • CAR REPAIR CONTRIBUTOR
  • 19,053 POSTS
With electronic throttle control or with out ?
this code set when PCM detects an engine idle speed less than desired RPM
possible causes :
Air intake restriction
exhaust restriction
damaged throttle body
bad computer
IAC valve open
and so on there isnt a part that I would say remove and replace and problem solved
things need to be checked
1st we need to know if with or without electronic throttle body ?
Jul 19, 2008 at 6:31 AM
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ROGERSAGR
  • MEMBER
  • 2 POSTS
Thanks for your answer. The answer to your question.

It has an electronic throttle control.

Thanks, G
Jul 21, 2008 at 9:38 AM
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BMRFIXIT
  • CAR REPAIR CONTRIBUTOR
  • 19,053 POSTS
KE2 DTCS P0505, P0506, P0511, P1504 OR P1507: (OR STARTS ONLY AT PART THROTTLE) CHECK
THE VPWR VOLTAGE TO THE IAC VALVE

NOTE: If EGR DTC P0402 was output during the self-test, diagnose it first before continuing with this pinpoint test.
 IAC Actuator connector disconnected.
 Key in ON position.
 Measure the voltage between:
( + ) IAC Actuator Connector, Harness Side ( - ) Vehicle Battery VPWR - Pin 1 Negative terminal
Is the voltage greater than 10.5 V?
Yes Key in OFF position GO to KE3 .
No Key in OFF position. REPAIR the open circuit.


KE3 CHECK THE RESISTANCE OF IAC VALVE
 IAC Actuator connector disconnected.
 Measure the resistance between:

( + ) IAC Actuator Connector, Component Side IAC - Pin 2 VPWR - Pin 1 ( - ) IAC Actuator Connector, Component Side
Is the resistance between 6 ohms - 15 ohms?
Yes
GO to KE4 .
No INSTALL a new IAC Valve.

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Jul 21, 2008 at 9:59 PM