Difference between revisions of "P00AF/000175"

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** Engine off, no vacuum 120.4 should read about 3.5V
 
** Engine off, no vacuum 120.4 should read about 3.5V
 
** Engine Off, apply 17 Inches of mercury, 120.4 should drop to about .7V
 
** Engine Off, apply 17 Inches of mercury, 120.4 should drop to about .7V
** Engine at idle, 120.4 should read about 7.V
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** Engine at idle, 120.4 should read about .7V
 
** If 120.4 voltage doesn't alter, VNT may be seized or G581 failed
 
** If 120.4 voltage doesn't alter, VNT may be seized or G581 failed
  
 
==== Special Notes ====
 
==== Special Notes ====
  
* On some TDI engines, the Vacuum Diaphragm/G581 unit can be purchased as a separate part from dealer.
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* On some '''TDI''' engines, the Vacuum Diaphragm/G581 unit can be purchased as a separate part from dealer.
* [[2.0L CR TDI]] owners may find the following threads helpful:
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* '''[[2.0L CR TDI]]''' owners may find the following threads helpful:
 
** http://forums.ross-tech.com/showthread.php?404-009571-Turbocharger-Boost-Control-Position-Sensor-Circuit-P2563
 
** http://forums.ross-tech.com/showthread.php?404-009571-Turbocharger-Boost-Control-Position-Sensor-Circuit-P2563
 
** http://forums.ross-tech.com/showthread.php?4891-2009-TDi-Having-issues-with-Turbo-seeking-some-advise
 
** http://forums.ross-tech.com/showthread.php?4891-2009-TDi-Having-issues-with-Turbo-seeking-some-advise
 
*** Post #10 includes a YouTube video link.
 
*** Post #10 includes a YouTube video link.
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* When found in '''Gasoline'''  engines such as the CHHB (or similar EA888 engines) this thread may be helpful:  [https://forums.ross-tech.com/showthread.php?19866-Case-Study-15202-Actuator-Module-for-Turbocharger-1-P00AF-00-109-Stuck Case Study: 15202 - Actuator Module for Turbocharger 1 P00AF 00]
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__FORCETOC__
 
__FORCETOC__
 
[[Category:Fault Codes]]
 
[[Category:Fault Codes]]

Latest revision as of 07:44, 28 April 2022

000175/P00AF - Actuator Module for Turbocharger 1: Stuck

Possible Symptoms

  • Malfunction Indicator Light (MIL) ON
  • Glow Plug light flashing
  • Reduced engine performance

Possible Causes

  • Defective N75
  • N75 connector plugged into the wrong 2 wire component. Check wiring diagram to confirm
  • Vacuum leak or low vacuum
  • VNT sticking or seized
  • G581 sensor

Possible Solutions

  • Verify N75 is working to design, use Output Testing
  • Verify the N75 connector plugged into N75 per the factory level wiring diagram rather than any other component that may not set a fault code such as N79 (Positive Crankcase Ventilation (PCV) heating element)
  • Verify vacuum lines are good, check engine vacuum at idle
  • Test VNT and G581, apply vacuum to VNT and watch MVB 120.4
    • Engine off, no vacuum 120.4 should read about 3.5V
    • Engine Off, apply 17 Inches of mercury, 120.4 should drop to about .7V
    • Engine at idle, 120.4 should read about .7V
    • If 120.4 voltage doesn't alter, VNT may be seized or G581 failed

Special Notes