Question about Cars & Trucks
The onboard computer maintains an air/fuel mixture at 14.7 to 1, if one of the oxygen sensors is failing it will change the air/fuel mixture for engine combustion. When this happens the onboard computer detects that the air/fuel mixture is out of range and sets the "check engine light" to come on, on the dash. When the computer is scanned for fault codes it will relay back information as to the cause of the problem. If an oxygen sensor is detected as operating out of its range, a specific code number is displayed through testing equipment that reads 'fault codes' and it will display which one is faulting. Hope this helps.
Posted on Apr 16, 2014
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Posted on Jan 02, 2017
SOURCE: nissan xterra knock sensor
It's the valley of the engine underneath the intake manifold. It's about an $800 job because the top of the engine has to come off. However, unless you have a supercharged xterra it shouldn't effect performance. Also, the knock sensor will not trip the check engine light, as it does not indicate a primary problem, so if your light is on you should have another code that should be fixed first.
Posted on Nov 24, 2008
The knock sensor is not a huge deal to replace and will not turn on the light. It should be dont though.
The crankshaft sensor is located directly between the engine and transmission. It is dead center at the bottom.
Posted on May 21, 2009
V6 3.3L The sensor is located underneath the air intake manifold on top
of the engine block. This should take an experienced mechanic about 3-4
hours to replace.
Fig. Engine compartment component locations
Hope this help (remember rated this free help) Good luck.
Posted on Feb 08, 2010
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