GreenLeggy
02-17-2011, 07:43 PM
Hello everyone, my wagon kept throwing code P0325 so, after doing some research, I found out it might be a faulty knock sensor and decided to replace it myself. Here is a walk-through which I hope helps people who need to do this simple fix.
Disclaimer: I did this myself to save some money and because I enjoy a bit of a challenge every now and then. the procedure is relatively simple but if you are not mechanically inclined, of have difficulty following instructions, I would recommend you allow someone else to do this for you. Having said that, if you do decide to follow this simplistic guide, you do so of your own volition and I will accept absolutely no responsibility for any issues wrong that may come up during YOUR attempt at performing this maintenance procedure.
Tools needed:
1/2" Ratchet Wrench
1/2" socket extension (6" in length or more)
12 mm socket
10 mm socket - or - 10 mm flare wrench
Flat-head screwdriver
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/Ratchetwithextensionand12mmsocket.jpg
For visual learners like me, please refer to the photos. Things will make sense.
Step one:
Disconnect negative terminal from battery. Do this by using a 10mm socket or flare wrench to loosen bolt enough to remove terminal. (It is highly recommended that anytime you do maintenance that requires connecting/disconnecting plugs and wires in the car, the negative terminal is removed from the battery)
Step two:
Locate knock sensor (Knock sensor is located below throttle body on driver's side)
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/Removeconnector2.jpg
Step three:
Disconnect plug (on driver's side) from the throttle-body (this will allow better access to knock sensor with socket extension)
Step four:
Locate and disconnect pig-tail plug coming from knock sensor. (White plug on right side of photograph)
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/SensorLocation1.jpg
Step five:
Locate zip-tie and loosen in order to slide pig-tail connector through and remove sensor. (Use flat-head screwdriver to pry tab away from tie in order to loosen it) If you want to cut it and replace it, do so at you own risk. Ensure that when you do replace it, you do not tighten it too much as it may chafe the wire.
https://sl-i.net/FORUM/
Step six:
Note orientation of sensor and use ratchet, extension and 12mm socket to loosen bolt fastening sensor to block. Remove bolt by turning counter-clockwise and place in a safe spot, remove sensor (ensure sensor connector has been passed through zip-tie before pulling it out)
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/OldSensorLScrack.jpg
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/OldSensorRSCrack.jpg
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/NewandOldcomparisontop.jpg
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/NewandOldcomparisonbottom.jpg
Step seven:
Ensure no debris gets into threaded hole for sensor. Get new sensor (NAPA CANADA part number 846 3001 by ULTRA-8) and attach said sensor to block, using old bolt. (I am unsure of the proper torque specifications so I simply tightened by hand, using the extension and then finished it off by turning the wrench and additional 1/8th of a turn.)
https://sl-i.net/FORUM/
Step eight:
Once sensor is secured (check for movement), thread sensor connector through zip-tie and reconnect it. Once reconnected, re-tighten zip-tie ( not too tight, or it might chafe wire)
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/LocationofKnockSensor2.jpg
Step nine:
Ensuring both the sensor and connector are properly attached, re-connect black sensor to throttle-body.
Step ten:
Check all plug connections. Once all connections are made, re-attach the negative wire to the negative battery terminal and tighten.
Step eleven:
Remove all tools from the vicinity of the engine bay and, before shutting hood, start car.
Step twelve:
Check for codes. If no codes are present, and the car runs fine, then you are done. If any knock-sensor codes present themselves, namely P0325, shut car off and trouble shoot by checking the sensor and all connections made.
Hope this helps you go back to enjoying your p0325-free car!
Disclaimer: I did this myself to save some money and because I enjoy a bit of a challenge every now and then. the procedure is relatively simple but if you are not mechanically inclined, of have difficulty following instructions, I would recommend you allow someone else to do this for you. Having said that, if you do decide to follow this simplistic guide, you do so of your own volition and I will accept absolutely no responsibility for any issues wrong that may come up during YOUR attempt at performing this maintenance procedure.
Tools needed:
1/2" Ratchet Wrench
1/2" socket extension (6" in length or more)
12 mm socket
10 mm socket - or - 10 mm flare wrench
Flat-head screwdriver
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/Ratchetwithextensionand12mmsocket.jpg
For visual learners like me, please refer to the photos. Things will make sense.
Step one:
Disconnect negative terminal from battery. Do this by using a 10mm socket or flare wrench to loosen bolt enough to remove terminal. (It is highly recommended that anytime you do maintenance that requires connecting/disconnecting plugs and wires in the car, the negative terminal is removed from the battery)
Step two:
Locate knock sensor (Knock sensor is located below throttle body on driver's side)
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/Removeconnector2.jpg
Step three:
Disconnect plug (on driver's side) from the throttle-body (this will allow better access to knock sensor with socket extension)
Step four:
Locate and disconnect pig-tail plug coming from knock sensor. (White plug on right side of photograph)
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/SensorLocation1.jpg
Step five:
Locate zip-tie and loosen in order to slide pig-tail connector through and remove sensor. (Use flat-head screwdriver to pry tab away from tie in order to loosen it) If you want to cut it and replace it, do so at you own risk. Ensure that when you do replace it, you do not tighten it too much as it may chafe the wire.
https://sl-i.net/FORUM/
Step six:
Note orientation of sensor and use ratchet, extension and 12mm socket to loosen bolt fastening sensor to block. Remove bolt by turning counter-clockwise and place in a safe spot, remove sensor (ensure sensor connector has been passed through zip-tie before pulling it out)
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/OldSensorLScrack.jpg
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/OldSensorRSCrack.jpg
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/NewandOldcomparisontop.jpg
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/NewandOldcomparisonbottom.jpg
Step seven:
Ensure no debris gets into threaded hole for sensor. Get new sensor (NAPA CANADA part number 846 3001 by ULTRA-8) and attach said sensor to block, using old bolt. (I am unsure of the proper torque specifications so I simply tightened by hand, using the extension and then finished it off by turning the wrench and additional 1/8th of a turn.)
https://sl-i.net/FORUM/
Step eight:
Once sensor is secured (check for movement), thread sensor connector through zip-tie and reconnect it. Once reconnected, re-tighten zip-tie ( not too tight, or it might chafe wire)
http://i188.photobucket.com/albums/z269/Rd2002P5/Leggy/LocationofKnockSensor2.jpg
Step nine:
Ensuring both the sensor and connector are properly attached, re-connect black sensor to throttle-body.
Step ten:
Check all plug connections. Once all connections are made, re-attach the negative wire to the negative battery terminal and tighten.
Step eleven:
Remove all tools from the vicinity of the engine bay and, before shutting hood, start car.
Step twelve:
Check for codes. If no codes are present, and the car runs fine, then you are done. If any knock-sensor codes present themselves, namely P0325, shut car off and trouble shoot by checking the sensor and all connections made.
Hope this helps you go back to enjoying your p0325-free car!