Engine Controls - Idle Fluctuation/DTC's P0505/P0506
TSB 12-7-407/19/12
DTCS P0505, P0506 AND/OR ENGINE IDLE RPM
FLUCTUATION - HARD START
FORD:
2005-2008 Crown Victoria
2005-2009 Mustang
2004-2006 F-150
2004-2007 Explorer, F-Super Duty
2005-2006 E-Series
2006 F-53 Motorhome Chassis
2007 Explorer Sport Trac
LINCOLN:
2005-2008 Town Car
2006 Mark LT
MERCURY:
2005-2008 Grand Marquis
2004-2007 Mountaineer
This article supersedes TSBs 10-2-5,10-2-3, 9-24-1, 09-4-5, 09-4-2 and 08-18-2 to consolidate previously released information and update the Service Procedure.
ISSUE
Some vehicles may exhibit diagnostic trouble codes (DTCs) P0505, P0506 and/or engine idle RPM fluctuation and hard starts. These vehicles may also exhibit DTCs P2111 and P2112 after KAM has been is cleared, or the battery has been disconnected or the vehicle had a dead battery. On vehicles with over 10,000 miles the issue may be caused by sludge buildup in the electronic throttle body (ETB) leading to air[low being less than desired.
ACTION
Follow the service procedure to correct the condition.
SERVICE PROCEDURE
1. Verify vehicle is listed in the vehicle application chart.
2. Using IDS datalogger or equivalent, check the PID value of ETC_TRIM.
a. If ETC_TRIM PID is not available proceed to Step 3.
b. If ETC_TRIM PID is available proceed to Step 4.
3. Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 75.03A and higher. Calibration files may also be obtained at the website.
4. With the vehicle in park or neutral and A/C off, start the vehicle and allow the engine to reach normal operating temperature which is greater than 77 °C (170 °F) coolant temperature.
5. While the engine is running, using IDS datalogger or equivalent, check the PID value of ETC_TRIM.
a. If ETC_TRIM value is 3.0 degrees or greater, proceed to Step 6.
b. If ETC_TRIM value is less than 3.0 degrees, but drivability concerns persist, Refer to Powertrain Control/Emissions Diagnosis (PC/ED) manual for normal diagnostics.
6. Remove the throttle body. Refer to Workshop Manual (WSM), Section 303-04.
7. Using Motorcraft(R) Choke and Linkage Cleaner or equivalent, spray the throttle body plate and bore. Using a small, soft, solvent resistant brush, clean the edges of the throttle plate and the mating surface of the throttle bore to remove all engine deposit build up. Reapply choke and linkage cleaner. (Figures 1-2)
NOTE
DO NOT SPRAY CLEANER DIRECTLY INTO THROTTLE PLATE PIVOT SHAFT.
8. Install the throttle body. Refer to WSM, Section 303-04.
WARRANTY STATUS: Eligible Under Provisions Of New Vehicle Limited Warranty Coverage Warranty/ESP coverage limits/policies/prior approvals are not altered by a TSB. Warranty/ESP coverage limits are determined by the identified causal part and verified using the OASIS part coverage tool.
OPERATION DESCRIPTION TIME
120704A All Vehicles Included In 0.6 Hr.
This Article: Check DTCs,
Reprogram The PCM,
Warm The Engine, And
Monitor ETC Trim Less
Than 3.0 Degrees PASS
120704B 2006-2007 Explorer, 1.0 Hr.
Mountaineer 4.6L,
2004-2006 F- 150 4.6L,
2007 Explorer Sport Trac
4.6L 3V: Check DTCs,
Reprogram The PCM
Warm The Engine, Monitor
ETC Trim Greater Than
3.0 Degrees FAILED,
Clean The Throttle Body
Includes Time To Remove
And Install The Throttle
Body (Do Not Use With
Any Other Labor
Operations)
120704B 2005-2008 Crown Victoria, 1.1 Hrs.
Grand Marquis, Town Car,
2006 Mark LT 5.4L,
2004-2007 Explorer,
Mountaineer 4.0L, 2007
Explorer Sport Trac 4.0L,
2005-2006 Econoline 4.6L,
2007-2009 Mustang 5.4L,
2006 Mustang 4.6L,
2005-2006 F-Super Duty
450/550 6.8L, 2004-2005
Explorer, Mountaineer
4.0L, 2004 F-Super Duty
250 5.4L: Check DTCs
Reprogram The PCM
Warm The Engine, Monitor
ETC Trim Greater Than
3.0 Degrees FAILED,
Clean The Throttle Body
Includes Time To Remove
And Install The Throttle
Body (Do Not Use With
Any Other Labor
Operations)
120704B 2005-2006 Mustang 4.0L, 1.2 Hrs.
2004-2006 F-150 5.4L 3V:
Check DTCs, Reprogram
The PCM, Warm The
Engine, Monitor ETC Trim
Greater Than 3.0 Degrees
FAILED, Clean The
Throttle Body Includes
Time To Remove And
Install The Throttle Body
(Do Not Use With Any
Other Labor Operations)
120704B 2005-2007 F-Super Duty 1.3 Hrs.
5.4L 3V: Check DTCs,
Reprogram The PCM,
Warm The Engine, Monitor
ETC Trim Greater Than
3.0 Degrees FAILED,
Clean The Throttle Body
Includes Time To Remove
And Install The Throttle
Body (Do Not Use With
Any Other Labor
Operations)
120704B 2005-2006 Econoline 1.4 Hrs.
5.4L/6.8L: Check DTCs,
Reprogram The PCM,
Warm The Engine, Monitor
ETC Trim Greater Than
3.0 Degrees FAILED,
Clean The Throttle Body
Includes Time To Remove
And Install The Throttle
Body (Do Not Use With
Any Other Labor
Operations)
DEALER CODING
CONDITION
BASIC PART NO. CODE
9F991 41
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