Q7 Quattro V6-3.6L (BHK) (2007)
Knock Sensor: Customer Interest
Engine Controls - MIL ON/DTC's P0327/P0325
01 MIL on (DTC P0327 or P0325 in ECM)
28 10 08
2019070/3
June 3, 2010
Supersedes Technical Service Bulletin Group 28 number 09-04 dated March 18, 2009 for reasons listed below.
Affected Vehicles
Condition
^ MIL on.
^ DTC P0327 (knock sensor 1-G61, signal too small) or P0325 (knock sensor 1-G61, circuit malfunction) in ECM memory.
Technical Background
The condition is caused by humidity ingress in the knock sensor or its wire.
Engine performance is not affected.
Production Solution
Improved knock sensors with extra heat insulation and a special bracket for a modified installation position.
Service
1. Replace knock sensor G61 with wiring harness 03H 905 377A.
2. Tighten the mounting bolt of knock sensors to 20 Nm.