Parts for your 2023 Mitsubishi Eclipse cross-Knock sensor

2023 Mitsubishi Eclipse Cross knock sensor — what it does and when to service it

Based on technical references, the 2023 Mitsubishi Eclipse Cross is fitted with a knock sensor and actively uses knock control in its engine management. This is documented in the Mitsubishi Motors Eclipse Cross Service Manual (GK-series, Engine Control/Engine Electrical sections: Knock Sensor), which outlines the sensor’s role and related diagnostics (for example, DTCs like P0325). The Mitsubishi global parts catalogue for the 1.5L turbocharged MIVEC (4B40) also lists a dedicated knock sensor and harness. These factory sources confirm the knock sensor is relevant and used on 2023 models sold in Australia and New Zealand.

The knock sensor’s job is to “listen” for the tell-tale vibration of knock (detonation) through the engine block. When the sensor picks up that sharp ping, the ECU quickly trims ignition timing and, if required, tweaks fuelling or boost to keep the engine safe. On the Eclipse Cross’s direct-injection petrol engine, this lets Mitsubishi run efficient timing for pep and economy, while protecting pistons, rings and bearings from the harsh pressure spikes that knock can cause.

As a general rule, the knock sensor isn’t a routine replacement item. It’s a solid-state device and, unless it’s physically damaged or the wiring’s crook, it’ll usually last the life of the vehicle. During scheduled servicing, however, it’s smart to:

• Check for engine warning lights or stored fault codes (P0325–P0330 range) and address them promptly.
• Inspect the sensor connector and loom for oil contamination, heat damage or chafing under the bonnet.
• Keep to the recommended fuel grade in the owner’s manual to minimise knock events.

If replacement is needed, a technician will typically disconnect the battery, access the sensor on the engine block (beneath the intake side on the 1.5T), and swap it out. The sensor must be tightened to the factory torque so it reads block vibrations accurately—over- or under-tightening can skew readings. Use genuine or high-quality equivalent parts, route the harness exactly as per the manual, clear any codes, and perform a road test and data check to confirm the ECU sees stable knock counts. There’s no regular “maintenance” beyond inspection, but if the engine ever feels flat, rattly under load, or shows poorer fuel economy, a diagnostic scan is worthwhile to rule out a lazy sensor or wiring fault. Keeping the air filter fresh and addressing carbon build-up or misfire issues also helps reduce knock activity the sensor has to manage.

Popular questions

Does the 2023 Eclipse Cross actually have a knock sensor?
Yes. Factory service information for the GK-series Eclipse Cross shows a dedicated knock sensor feeding the ECU for closed-loop knock control, and the parts catalogue lists the sensor for the 1.5L turbo engine. It’s a standard part of modern Mitsubishi engine management.

How often should the knock sensor be replaced?
There’s no fixed interval—replace only if it’s faulty or damaged. During regular servicing, a technician should check for related fault codes and inspect the wiring. If the sensor fails, fit a quality replacement and torque it to spec.

What are the signs of a failing knock sensor?
Common clues include a check engine light, reduced power, rough running under load, poor fuel economy, or abnormal pinging. A scan tool may show codes like P0325. Always rule out poor fuel, ignition or intake issues before condemning the sensor.