Parts for your 2020 Mitsubishi Eclipse cross-Camshaft sensor

2020 Mitsubishi Eclipse Cross Camshaft Sensor

Based on Mitsubishi’s own technical information, the 2020 Eclipse Cross (1.5L MIVEC turbo, engine code 4B40) is fitted with a camshaft position sensor. This is documented in the Mitsubishi Motors Service Manual for Eclipse Cross 2018–2020 (Engine Control, DTC P0340/P0341 – Camshaft Position Sensor Circuit) and shown in the Mitsubishi ASA electronic parts catalogue under Engine Electrical (Camshaft Position Sensor).

The camshaft sensor on the Eclipse Cross plays a key role in smooth, efficient running. It tells the engine control module exactly where the camshaft is, so it can time fuel injection and spark precisely and manage MIVEC variable valve timing. That real-time phasing info helps the 1.5T pull strongly from low revs, keep emissions in check, and avoid the rough starts and misfires that come with guesswork.

There’s no scheduled maintenance interval for the cam sensor—it's a sealed, solid-state component. During routine servicing, a quick visual once-over is smart: check the connector for broken locks or green crust (corrosion), make sure the harness isn’t rubbing through on the cam cover, and look for oil leaks that could contaminate the plug. Clean, correct engine oil is also important, as poor oil condition can upset valve timing behaviour that relies on accurate cam feedback.

Common signs the sensor or its circuit is playing up include a check engine light, hard starting, uneven idle, sudden loss of power, or the ECU dropping into a limp mode. Typical fault codes are P0340 and P0341, as listed in Mitsubishi diagnostics. If those crop up, inspection should cover both the sensor and its wiring before parts are thrown at the problem.

Replacement is straightforward and usually does not require programming. A technician will let the engine cool, disconnect the battery, unplug the connector, remove the retaining bolt, and lift out the sensor. A new O-ring should be lightly oiled and fitted to the replacement unit before installation. The sensor is seated squarely and fasteners tightened to the specification in the service manual, the connector is reattached, codes are cleared, and a road test confirms proper operation. Using a genuine or OE-quality part is recommended to keep the timing signal clean and stable—cheap copies can introduce intermittent faults that are hard to chase.

• Location: mounted on the cylinder head near the timing end, with access from above.
• No routine replacement interval, replace on confirmed fault.
• Always verify wiring integrity and oil condition alongside the sensor itself.

Popular questions

Where is the camshaft sensor on a 2020 Eclipse Cross?
The sensor sits on the cylinder head at the timing chain end, typically on the top side of the cover. It’s held with a small retaining bolt and has a two- or three-pin connector. Access is from the top of the engine bay, making inspection and replacement relatively simple for a trained tech.

Does a new camshaft sensor need programming?
On the Eclipse Cross 4B40, the ECU self-adapts to a new camshaft sensor. No coding is normally required. After fitting, clearing fault codes and performing a brief idle stabilisation or drive cycle is good practice to let the ECU validate the new signal.

Can a bad camshaft sensor damage the engine?
It won’t usually cause direct mechanical damage, but it can lead to poor running, higher fuel use, and potential catalyst stress from misfires if ignored. Sorting it promptly keeps the engine performing as intended and prevents secondary issues.