MIL ON - DTC P0506 AND/OR P0505 - HESITATION/LOSS OF RPM/DIFFICULTY STARTING/LOW IDLE RPM
Publication Date: January 25, 2010
Some 2005 Mustang vehicles equipped with a 4.0L engine may exhibit a malfunction indicator light (MIL) and diagnostic trouble codes (DTCs) P0506 and/or P0505 with hesitation, loss of RPM, difficulty starting and low idle drivability concerns.
Follow the Service Procedure steps to correct the condition.
Reprogram the powertrain control module (PCM) to the latest calibration using IDS release 64.10 and higher or 65.01 and higher. This new calibration is not included in the VCM 2010.1 DVD. Calibration files may also be obtained at www.motorcraft.com.
Turn the key off to re-initalize the PCM. This will allow the sludge compensation strategy to learn.
With the vehicle in park or neutral and A/C off, start vehicle and allow engine to reach normal operating temperature (Greater than 170 °F (77 °C) coolant temperature). Run an additional five (5) minutes to allow sufficient learning time.
While the engine is running, using IDS datalogger or equivalent, check the PID value of ETC_TRIM.
If ETC_TRIM value is 3.5 degrees, and/or DTC P115E is present then replace the electronic throttle body (ETB), following Workshop Manual (WSM), Section 303-04B.
If ETC_TRIM value is less than 3.5 degrees, and DTC P115E is not present, but driveability concerns persist, the ETB is not the likely the cause of the concern and replacement is not necessary. Continue with normal Powertrain Controls/Emissions Diagnosis (PC/ED) diagnostics.
Throttle Body - 4.0L
Eligible Under Provisions Of New Vehicle Limited Warranty Coverage And Emissions Warranty Coverage IMPORTANT: Warranty coverage limits/policies are not altered by a TSB. Warranty coverage limits are determined by the identified causal part.
2005 Mustang 4.0L: Check For DTCs, Reprogram The PCM, Includes Time To Monitor ETC_Trim Value (Do Not Use With Any Other Labor Operations)
2005 Mustang 4.0L: Check For DTCs, Reprogram The PCM, Includes Time To Monitor ETC_Trim Value, And Replace The Throttle Body (Do Not Use With Any Other Labor Operations)