Code P0325 stored in 1997 Nissan Maxima. Since the punch sensor is usually at error I normally test it first. The hit sensor is located under the intake and also is available on the driver’sside that the car.

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Locate the hit sensor subharness connector. It is near the dipstick tube, red knob in center of above picture.

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Disconnect the sensor and check resistance native terminal #1 (white wire) to engine ground. Resistance need to be between 500K -620K ohms. If the resistance is not within the specifications the sensor and also subharness should be eliminated to do additional testing. If it is within specifications recheck if wiggling the subharness wires. If quiet no problem is uncovered the wire in between the computer and the knock sensor have to be confirm for opens or grounds.

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In this and also in most situations it was no within specifications. Currently comes the tricky part, the labor guides give 2.9 hrs to readjust the sensor and it needs removal the the intake. I have a short cut if you have some tools and also patience it can be excellent in about half an hour or so. Ns always shot to check out if I can break the it is registered bolt loosened with a swivel socket and also extension. If it does then great ,simply eliminate the bolt and also use the subharness to pull the punch sensor up and also out. Execute NOT bend THE exploit . You need to keep that in it’s original shape come reinstall the sensor without any difficulty.

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If the bolt will certainly not break loose easily, what I execute is with the assist of a telescoping magnet, I lower a long 12 allude boxed end wrench right into position ~ above the punch sensor retaining bolt. Climate I usage a long skinny screw driver to host the wrench in ar while the magnet is removed.

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Then while maintaining the wrench in place with the lengthy skinny driver I put a hefty pry bar into position to use as a bar to move the wrench.

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After the bolt is broken loos the is simple to remove with the swivel socket and extension supplied earlier.

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With the sensor and also subharness removed it is now easy to inspect the sensor. This one like countless has an exterior split and also tested faulty.

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To download the new knock sensor, connect the subharness and also drop the attaching bolt right into the sensor. Utilizing a lengthy skinny driver or a mechanics finger (actual name of tool) as a support and also guide lower the sensor and bolt right into position. Once you feeling the the bolt drop right into the threaded hole, use the harness to preserve this position. Next ar your swivel socket and extension in place without relocating the bolt native it’s centered position. Gently revolve the bolt making certain not to overcome thread it. It may take a couple of attempts. Be patient and really gentle together it will certainly be a 3 hour mistake. When the bolt is tightened with the swivel socket, I normally drop the wrench back in place and also put a last tightening ~ above it v the pry bar together outlined in the removed procedure. Do NOT over TIGHTEN.

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