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95 dreaded Knock and O2 codes

  #1  
Old 09-10-2008, 11:40 PM
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i have the dreaded knock sensor and O2 codes on my 95 villager, i know from a past experience that they go hand in hand and its just a waist of money to replace them, but i cannot remember what the real problem was behind those codes any help would be appricated. i already checked the egr hose that loves to rot away.
 
  #2  
Old 09-13-2008, 10:29 AM
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I just had the codes read on my 99 Villager, and I''m in the same boat. No O2 sensor code, but the PO325-Knock Sensor. I just put in new spark plugs and wires, and still have a very light stumble at idle. Otherwise it runs fine. I hear fixing this is pricey (I''m not doing it myself), but that you don''t really have to. I''m looking for more info on if it really needs to be changed or not.
 
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Old 09-13-2008, 12:28 PM
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lets put it this way if you get a pinging sound underload then change the knock sensor if it dont ping dont change it. these nissan engines are prone for showing a knock sensor code. usually the main issues i find is the throttle position sensor, plugged egr or rotten hose (short one from the egr) have you run some quality(seafoam & lucasworks awsome)fuel injector cleaner in it yet?
 
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Old 09-15-2008, 12:33 PM
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Originally Posted by houston81


lets put it this way if you get a pinging sound underload then change the knock sensor if it dont ping dont change it. these nissan engines are prone for showing a knock sensor code. usually the main issues i find is the throttle position sensor, plugged egr or rotten hose (short one from the egr) have you run some quality(seafoam & lucasworks awsome)fuel injector cleaner in it yet?


No ping under load. I ran double strength Lucas fuel conditioner through the system, and I''ve only got 58K miles, so don''t think the EGR would be bad already. I will probably take it to my local mechanic this week, and will report back what they find. I won''t let them talk me into changing the knock sensor - thanks for the tip.


 
  #5  
Old 10-11-2008, 05:06 AM
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What was the original question? The codes are there but there is no knocking or pinging? In my experience changing bad oxygen sensors is inexpensive and can really improve gas mileage. I do agree about the knock-sensor with the Nissan engines. Reset the comp. and see if the CEL comes back on. I have a 1997 Ranger with 160,000 miles and a frozen egr valve. It pings under load like a son of a gun. I just run 90 octane fuel or higher or add octane boost and the pinging disapears 100%.
 
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