AutoCodes
 
OBDII Code List
 
P0506 LINCOLN

P0506 LINCOLN - Idle Speed Control System RPM Lower Than Expected

Repair Importance Level: 3/3
Repair Difficulty Level: 2/3   
Comments  |  Add Comment

Possible causes

  • Dirty throttle body
  • Electric throttle control actuator misadjusted or damaged
  • Faulty Electric throttle control actuator
  • Intake air leak
  • Poor electrical connection to the Intake Air Control (IAC) valve

Tech notes

If there are no intake leaks, clean throttle body, adjust engine idle and erase engine code. If the code comes back you may have to replace the Electric Throttle Control Actuator (Motor) to repair the problem.

There is a factory service bulletin for the following Lincoln Models:

2005-2007 Town Car
2006 Mark LT
Lincoln Factory Service Bulletin OBDII Code P0506

When is the code detected?

The idle speed is less than the target idle speed by 100 rpm or more.

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)
  • Engine hard to start
  • Rough or erratic idle speed

P0506 Lincoln Description

The Engine Control Module (ECM) controls the engine idle speed to a specified level through the fine adjustment of the air, which is let into the intake manifold, by operating the electric throttle control actuator. The operating of the throttle valve is varied to allow for optimum control of the engine idling speed. The ECM calculates the actual engine speed from signals of crankshaft position sensor (POS) and camshaft position sensor.

The ECM controls the electric throttle control actuator so that the engine speed coincides with the target value memorized in the ECM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the ECM is determined by taking into consideration various engine conditions, such as during warming up, deceleration, and engine load (air conditioner, power steering and cooling fan operation, etc.)

OBDII Code P0506 Lincoln - Idle Speed Control System RPM Lower Than Expected - AutoCodes.com

Need more help?

Get the P0506 Lincoln code diagnosed by a professional: Find a repair shop in your area

Related Information

P0506 LINCOLN Comments

Help us improve AutoCodes.com. Leave a comment below or tell us if the information above help you fix the code. What are the symptoms on your vehicle for the P0506 Lincoln code? Have you replaced any parts?
Any information is appreciated. Thanks
Top ⇧