Engine-Codes - Lincoln - P0506 Lincoln

P0506 Lincoln Code - Idle Speed Control System RPM Lower Than Expected

- Code Popularity: 18,865 Views
- Repair Importance Level: 3/3
- Repair Difficulty Level: 2/3
Table of contents
ChatAC AutoCodes.com AI Chat

What are the Possible Causes of the DTC P0506 Lincoln?

NOTE: The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
  • Intake air restriction
  • Vacuum leaks
  • Dirty Throttle Body
  • Faulty Electronic Throttle Actuator Control (TAC)
  • Electronic Throttle Actuator Control harness is open or shorted
  • Electronic Throttle Actuator Control circuit poor electrical connection
  • Faulty Powertrain Control Module (PCM)

Code Tech Notes

There is a factory service bulletin for the following Lincoln Models:
2005-2007 Lincoln Town Car
2006 Lincoln Mark LT
Lincoln Factory Service Bulletin OBDII Code P0506









User Submitted Video

⚠ Does your Lincoln have Safety Recalls? → Check here

How to Fix the DTC P0506 Lincoln?

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 pins.

Search for P0506 Lincoln Questions and Answers: Search here →

What is the Cost to Diagnose the Code?

Labor: 1.0

The cost to diagnose the P0506 Lincoln code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.

What are Code Possible Symptoms?

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

What Does the P0506 Lincoln Code Mean?

The Powertrain Control Module (PCM) 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 Electronic Throttle Actuator Control (TAC). The operating of the throttle valve is varied to allow for optimum control of the engine idling speed. The PCM calculates the actual engine speed from the signals of the crankshaft position sensor (POS) and the camshaft position sensor.
The PCM controls the Electronic Throttle Actuator Control so that the engine speed coincides with the target value memorized in the PCM. The target engine speed is the lowest speed at which the engine can operate steadily. The optimum value stored in the PCM 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.).
The Diagnostic Trouble Code (DTC) will set the idle speed is less than the target idle speed by 100 rpm or more.

P0506 Lincoln Code - Idle Speed Control System RPM Lower Than Expected

Need more Information on the Code?

Need more information on how to fix the P0506 Lincoln code? Get Access to Factory Service Manuals

Need Help with the Code?

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