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== P1025 - Fuel Pressure Regulation Valve (N276): Mechanical Failure ==
 
  
==== Possible Symptoms ====
 
 
* Malfunction Indicator Light (MIL) ON
 
* High pitched whining noise from engine when idling.
 
* ECM may also have stored in memory, P0088 - Fuel Rail/System Pressure: Too High.
 
 
 
==== Possible Causes ====
 
 
* Faulty High Pressure Fuel Pump
 
* Engine  camshaft(s) out of time
 
 
 
==== Possible Solutions ====
 
 
* Replace faulty High Pressure Fuel Pump
 
* Correct camshaft timing issues
 
 
 
==== Special Notes ====
 
 
* NAR (North American Region) VW Tech Tip 01-20-05 for 2006 to 2021 vehicles with the 3.6L engine has information on timing issues due to timing chain issues.
 
** https://static.nhtsa.gov/odi/tsbs/2020/MC-10180093-0001.pdf  NHTSA
 
*** Check camshafts phase adjustments, if [8 degrees(+/-)] or more the engine is considered out of time.
 
**** MVB group [208] and [209] with engine idling for non UDS ECMs
 
**** IDE00182 and IDE00184 with engine idling for UDS ECMs
 
* RoW (Rest of World) users may find TPI 2040216/1 helpful.
 
* When found in gas models with a remote battery such as the Q7, P0088 may be stored due to voltage drop issues.  TSB 2025746 applies to the NAR market.
 
 
[[Category:Fault Codes]]
 

Latest revision as of 08:47, 28 April 2022