Parts for your 2000 Nissan Navara-Knock sensor

2000 Nissan Navara (D22) knock sensor: what’s fitted and how to look after it

For the 2000 Nissan Navara (D22), whether a knock sensor applies depends on the engine. Technical coverage in the Nissan D22 Series Workshop Manual confirms a detonation/knock sensor is fitted on petrol variants (KA24DE), with diagnostic routines for DTC P0325 in the Engine Control (EC) section. Nissan FAST parts catalogues also list a “DET SENSOR” for KA24DE applications. By contrast, the EC sections for the diesel engines available that year (TD27, QD32 and ZD30DDT) do not include a knock/detonation sensor in their sensor line-ups. So: relevant and used on KA24DE petrol Navaras, generally not used on the diesel D22s of the same era.

On KA24DE petrol models, the knock sensor is the quiet achiever. It “listens” for high-frequency vibration from spark knock (pinging) and gives the ECU a heads-up to trim ignition timing. That keeps the ute running sweet under our hot Aussie and Kiwi conditions, especially on long climbs or when towing the tinny. It helps protect pistons and bearings, keeps power consistent, and can save fuel when everything’s in tune.

With age, two things commonly trip owners up: the sensor itself going open circuit and the sub-loom cracking under the intake runners. If the Check Engine lamp pops with P0325, don’t just clear it and hope, the ECU may pull timing and the Navara will feel a bit doughy. A quality OEM sensor and a fresh sub-loom usually sorts it.

• Typical signs of trouble: CEL with P0325, noticeable loss of grunt, poorer fuel economy, and an occasional rattle under load if timing can’t be corrected.
• Location: bolted to the block beneath the intake on the 2.4 petrol, reachable with a bit of patience and the right extensions.

Replacement is straightforward for a savvy DIYer, but many prefer to book it with a service as the manifold area can be fiddly. Keep the mating surface clean and dry, route the loom away from heat and sharp edges, and tighten the sensor to the workshop-manual torque spec using a torque wrench—over-tightening can numb its sensitivity. After fitting, clear codes and take a proper road test under load to let the ECU relearn.

As part of regular servicing, it’s smart to:

1. Inspect the knock sensor harness for brittleness and oil soak.
2. Check engine earths, poor grounds invite noisy signals.
3. Run decent 95 RON petrol if the ute tends to ping on hot days.

Owners of diesel D22s needn’t worry about a knock sensor service item—their engines use different control strategies and don’t list a knock sensor in the factory EC documentation for those years.

Popular questions

Where is the knock sensor on a 2000 Navara KA24DE?
It sits on the engine block, tucked under the intake manifold runners on the 2.4 petrol. Access is from the top with the right mix of extensions and wobble joints, though some techs prefer to pull ancillary bits for more room. A mirror and good lighting make it far less of a knuckle-buster.

Can a faulty knock sensor damage the engine if driven for long?
The ECU will usually soften ignition timing to protect the engine, so immediate damage is unlikely. That said, running for ages with a dead sensor can mask real knock, cost fuel economy, and make the ute feel lazy. Best to fix the sensor and harness promptly so the ECU can do its job properly.

What brand of replacement sensor works best?
Genuine Nissan or a reputable OEM-equivalent sensor is the safe bet. Cheap copies can be over- or under-sensitive, causing repeat fault codes or poor performance. Pair the new sensor with a fresh sub-loom if the original wiring looks tired to prevent come-backs.