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Board index » Tech Talk » Xterra Discussion » 2000 - 2004 Xterras
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XterraSC
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Post subject: 2002 knock sensor question Posted: Wed Jan 07, 2009 2:24 am |
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Noob |
Joined: Wed Jan 07, 2009 2:13 am Posts: 5 Location: Chilliwack, BC
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Have a 2002 Xterra SC, ECU has set knock sensor codes. Was just wondering if I could cut the wire from the knock sensor? Cutting the knock sensor wire stop it from giving faulse readings but could it cause the ecu to go into fale safe mode? Any shortcuts instead of me having to replace this sensor would be appreciated. Thanks.
Vehicle also lacks power and gets poor fuel mileage (approx. 300km per tank), most likely because of the retarded timing and reduced SC boost.
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Inurteeth2
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Post subject: Posted: Wed Jan 07, 2009 9:48 am |
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Supporting Member |
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Joined: Sun Sep 17, 2006 10:32 pm Posts: 1202 Location: Westport, Ma
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Well, i'm not an expert at this but from what i read on other Threads, Cutting the Wire wont help you. If you could just replace the Sensor and clear the codes. If your laking power it probably do to the Sensor. I dont know just my .02
_________________ Life's tough, get an Xterra. but i have a jeep now
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RIXterra
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Post subject: Posted: Wed Jan 07, 2009 11:18 am |
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Supporting Member |
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Joined: Sat Aug 20, 2005 3:27 pm Posts: 3723 Location: Bristol,RI
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I'm gonna go with Derek with cutting the wire not making the problem better.
_________________ How many wrenches can one man own? Don't ask stupid questions.
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daggerdoggie
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Post subject: Posted: Wed Jan 07, 2009 12:28 pm |
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Supporting Member |
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Joined: Thu Aug 18, 2005 4:42 pm Posts: 5700 Location: Oneonta, NY
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The knock sensor has to send 2.5 volts to the ECU. If you have low voltage you get code P327, which you would still get if you cut the wire. High Voltage gives you code P328.
Here's away around taking everything apart to replace it:
http://nexterra.org/forum/viewtopic.php ... ock+sensor
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XterraSC
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Post subject: Posted: Thu Jan 08, 2009 1:51 am |
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Noob |
Joined: Wed Jan 07, 2009 2:13 am Posts: 5 Location: Chilliwack, BC
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Yah...I guess if the voltage is high OR low that will put the ecu into failsafe.
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XterraSC
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Post subject: Posted: Thu Jan 08, 2009 2:01 am |
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Noob |
Joined: Wed Jan 07, 2009 2:13 am Posts: 5 Location: Chilliwack, BC
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So the knock sensor is a 2 wire sensor? All I have to do is relocate it and cut the 2 wires (white and grey ones) that go to the stock location sensor and run them to the new sensor?
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