simpfan Posted February 29, 2008 Share Posted February 29, 2008 I have a 94 pathfinder with 180,000 miles. The check engine light has been on for a few months, but it runs fine. Now that I need a smog check in order to register, I had it looked into. The mechanic says I need to replace the camshaft position sensor as well as the oxygen sensor. They want to charge me $1000. Based on helpful suggestions I received in this forum, I checked the codes myself and came back with error codes for 32) EGR Function and 34) Knock Sensor. Can you tell me a little about those? Where they're located, and are they easy to change? Is EGR function the EGR sensor, or does it encompass much more? Any help will be appreciated. Link to comment Share on other sites More sharing options...
88pathoffroad Posted February 29, 2008 Share Posted February 29, 2008 The knock sensor is UNDER the intake manifold and requires quite a bit of work to change. Dunno about the EGR function error, but after that many miles I can almost guarantee you the EGR valve or the lines for it are full of soot, carbon and other crap that probably doesn't help it work well. Link to comment Share on other sites More sharing options...
GhostPath Posted March 1, 2008 Share Posted March 1, 2008 Yup, and your mechanic is evidently full of fecal matter. Find another mechanic. The truck doesn't lie. Link to comment Share on other sites More sharing options...
k9sar Posted March 1, 2008 Share Posted March 1, 2008 typically you should address the first code first. I get the knock sensor code when the damned computer adjusts my mixture too rich or lean due to some other error like the O2 sensor etc. Link to comment Share on other sites More sharing options...
unccpathfinder Posted March 1, 2008 Share Posted March 1, 2008 Dunno about the EGR function error My 95 started doing that the last time I was back east...I didn't get time to look into it but I assume its what 88 said full of carbon...and with my EGR function SES light it only comes on periodically but goes off a couple of mins later and will be off for a while and then come back on so I assume the valve is sticking b/c of buildup Link to comment Share on other sites More sharing options...
Chriskaw440 Posted March 2, 2008 Share Posted March 2, 2008 IF you do have to replace the knock sensor, then yes most any shop will be expensive labor-wise since they all charge a ridiculous rate now just for labor....which is why I learned how to and did my own knock sensor replacement on my 1990 se. (and it had been bad for years.....) I just didnt have an extra $1000.00 laying around to pay someone to do it. I suggest getting the easier and cheaper things corrected first...then check for knock sensor code again....to see if its still present. Link to comment Share on other sites More sharing options...
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