OBD11 Code P1507
Senior Member
Joined: Oct 2002
Posts: 7,295
Likes: 125
From: St. Louis (Out in the woods)
Originally Posted by OLIE
I get this on my '96 f-150. What is required to repair the problem?
Follow the diagnostic procedure in the manual, pinpoint the fault, and replace the part or make the repair..
Senior Member
Joined: Dec 2005
Posts: 2,426
Likes: 2
From: Lebanon,TN
Its a problem with the IAC. First check the connection and power to it, if that checks ok you can try cleaning it with carb cleaner on the inside. I've not had much luck cleaning them so replacing it would be the next step. One thing not to overlook that can be cleaned is the inside of the throttlebody.
Senior Member
Joined: Oct 2005
Posts: 541
Likes: 1
From: Odenton MD
P1507 - Idle Air Control (IAC) Underspeed Error
Description: This DTC is set when the powertrain control module (PCM) detects an engine idle speed that is less than the desired RPM.
Possible Causes: IAC circuit open.
Air inlet is plugged.
Damaged or incorrect IAC valve.
IAC valve stuck closed.
VPWR to IAC solenoid open.
IAC circuit short to PWR.
Diagnostic Aids: The IAC solenoid resistance is 6 to 13 ohms.
Disconnect the IAC valve and look for little or no change in engine RPM as an indication of a stuck or damaged valve.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to KE1
Description: This DTC is set when the powertrain control module (PCM) detects an engine idle speed that is less than the desired RPM.
Possible Causes: IAC circuit open.
Air inlet is plugged.
Damaged or incorrect IAC valve.
IAC valve stuck closed.
VPWR to IAC solenoid open.
IAC circuit short to PWR.
Diagnostic Aids: The IAC solenoid resistance is 6 to 13 ohms.
Disconnect the IAC valve and look for little or no change in engine RPM as an indication of a stuck or damaged valve.
Application Key On Engine Off Key On Engine Running Continuous Memory
All GO to KE1