[vtraudt]

2009 Rabbit 2.5:
the common 'no power', 'only rev to 3k' etc symptoms.
Codes below.

From researching the topic, it appears the knock sensor(s?) is causing the issues.

I found 2 listed (one green, one grey; one 660mm, one 770mm (or so)), ordered the longer one (OEM).

a) how many knock sensors does the 2.5 inline 4 have?
b) how can I tell which sensor is causing the problem and needs to be changed (symptoms occur what appears to be random; haven't come back over last couple of days)
c) Where is/are the knock sensors located on the 2.5?
d) Need good DIY to do the change

Thx.


000818 - Knock Sensor 2 (G66)
P0332 - 000 - Signal too Low - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 15
Reset counter: 255
Mileage: 118239 km
Time Indication: 0
Date: 2000.00.00
Time: 12:50:21

Freeze Frame:
RPM: 1730 /min
Load: 31.8 %
Speed: 53.0 km/h
Temperature: 75.0°C
Temperature: 18.0°C
Absolute Pres.: 980.0 mbar
Voltage: 14.097 V

008577 - Performance Malfunction in Cooling System
P2181 - 000 -
Freeze Frame:
Fault Status: 01100000
Fault Priority: 0
Fault Frequency: 11
Reset counter: 255
Mileage: 121525 km
Time Indication: 0
Date: 2000.00.00
Time: 12:57:39

Freeze Frame:
RPM: 3115 /min
Load: 34.9 %
Speed: 119.0 km/h
Temperature: 75.0°C
Temperature: 21.0°C
Absolute Pres.: 980.0 mbar
Voltage: 14.224 V

005386 - Engine Off Timer Performance
P150A - 000 - - Intermittent
Freeze Frame:
Fault Status: 00100000
Fault Priority: 0
Fault Frequency: 4
Reset counter: 255
Time Indication: 0
Date: 2047.15.31
Time: 31:63:63

Freeze Frame:
RPM: 129 /min
Load: 71.0 %
Speed: 0.0 km/h
Temperature: 6.0°C
Temperature: 4.0°C
Absolute Pres.: 990.0 mbar
Voltage: 10.287 V


Readiness: 0000 0000

 

[vtraudt]

G66, Knock Sensor 2, is the right (towards passenger side, back (rear) of engine), long (760mm) green sensor. With car on jack, easy to get to.
Heat shield (3 bolts, 10mm hex), (axle heat shield, 2 bolts 16mm hex).
Sensor bolt: 13mm hex, torque (seems to be critical): 20 Nm

Also: cleaned the block surface where sensor sits.

Cable runs through corrugated cable tube. Open 3 slips, the pull the cable our of the split corrugated tube.

 

[Dave H.]

I had a similar reading from the knock sensor 2 (signal too low). Got them both replaced and continue to have the same issue with the new one. Anybody got ideas?