AutoCodes - Ford - P1504 1999 FORD F150

P1504 1999 FORD F150 Code - Intake Air Control Circuit Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3
Table of contents

|P1504 1999 FORD F150 code possible causes

  • Faulty Idle Air Control Valve
  • Idle Air Control Valve harness is open or shorted
  • Idle Air Control Valve circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

|How do I fix the P1504 1999 FORD F150 code?

Check the "Possible Causes" listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector's pins.

|P1504 1999 FORD F150 code tech notes

The Idle Air Control solenoid resistance is from 6 to 13 ohms.

|Cost of diagnosing the P1504 1999 FORD F150 code

Labor: 1.0

The cost of diagnosing the P1504 1999 FORD F150 code is 1.0 hour of labor. The auto repair's diagnosis time and labor rates vary by location, vehicle's make and model, and even your engine type. Most auto repair shops charge between $75 and $150 per hour.

|When is the P1504 1999 FORD F150 code detected?

Powertrain Control Module (PCM) has detected an electrical load failure on the Idle Air Control Valve (IACV) circuit.

|What are P1504 1999 FORD F150 code possible symptoms?

  • Engine Light ON (or Service Engine Soon Warning Light)

|P1504 1999 FORD F150 code description

The Idle Air Control Valve (IACV) valve assembly controls the engine idle speed and provides a dashpot function. The IAC valve assembly meters intake air around the throttle plate through a bypass within the IAC valve assembly and throttle body. The Powertrain Control Module (PCM) determines the desired idle speed or bypass air and signals the IAC valve assembly through a specified duty cycle. The IAC valve responds by positioning the IAC valve to control the amount of bypassed air. The PCM monitors engine RPM and increases or decreases the IAC duty cycle in order to achieve the desired RPM.
OBDII Code P1504 1999 Ford F150 - Intake Air Control Circuit Malfunction - AutoCodes.com

|Need more information with the P1504 1999 FORD F150 code?

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|P1504 1999 FORD F150 code comments

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Repair Importance Level: 3
 
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Repair Difficulty Level: 2
 
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