Difference between revisions of "17433/P1025/004133"

From Ross-Tech Wiki
Line 7: Line 7:
 
* High pitched whining noise from engine when idling.
 
* High pitched whining noise from engine when idling.
 
* ECM may also have stored in memory, P0088 - Fuel Rail/System Pressure: Too High.
 
* ECM may also have stored in memory, P0088 - Fuel Rail/System Pressure: Too High.
 +
  
 
==== Possible Causes ====
 
==== Possible Causes ====
  
* When found in 2006 to 2009 Volkswagen Passat, Passat CC and Touareg with 3.6L gasoline engines it is possible the HPFP (High Pressure Fuel Pump) / camshafts are out of time.
+
* Faulty High Pressure Fuel Pump
 
+
* Engine  camshaft(s) out of time
  
  
 
==== Possible Solutions ====
 
==== Possible Solutions ====
  
* When found in 2006 to 2009 Volkswagen Passat, Passat CC and Touareg with 3.6L gasoline engines:
+
* Replace faulty High Pressure Fuel Pump
** Check MVB group [208] and [209] with engine idling, if [8 degrees(+/-)] or more the engine is considered out of time.
+
* Correct camshaft timing issues
** NAR (North American Region) users can see VW Tech Tip [01-16-05] for exact repair details.
 
** 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.
 
  
  
 
==== Special Notes ====
 
==== Special Notes ====
  
* VW Tech Tip only applies to the 2006 to 2009 Volkswagen Passat, Passat CC and Touareg with 3.6L gasoline engines.
+
* NAR (North American Region) VW Tech Tips 01-16-05 and 01-20-05 for vehicles with the 3.6L engine has information testing for possible timing chain issues.
 
+
** https://static.nhtsa.gov/odi/tsbs/2016/MC-10096053-0699.pdf  NHTSA
 
+
** 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]]
 
[[Category:Fault Codes]]

Revision as of 15:09, 3 March 2021

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 Tips 01-16-05 and 01-20-05 for vehicles with the 3.6L engine has information testing for possible timing chain issues.
  • 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.