Parts for your 2017 Mitsubishi Lancer-Camshaft sensor

2017 Mitsubishi Lancer camshaft sensor — what it does and how to look after it

Yes, the 2017 Mitsubishi Lancer uses a camshaft position sensor. This is confirmed by Mitsubishi’s factory Service Manual for the CY/CZ Lancer (2008–2017), Group 13A Engine Electrical, which details the Camshaft Position Sensor (CMP) for the 2.0L 4B11 and 2.4L 4B12 petrol engines. The Mitsubishi ASA electronic parts catalogue for MY2017 Lancer also lists a CMP, and mainstream workshop data (Autodata) shows a CMP input in the engine management wiring and fault code lists (e.g., P0340/P0341). So it’s a relevant, fitted component on 2017 Lancer models sold in Australia and New Zealand.

On this Lancer, the camshaft sensor tells the ECU exactly where the camshaft is in relation to the crank. That lets the ECU fire the injectors sequentially, time the spark properly, and manage MIVEC variable valve timing for smooth power and good fuel economy. If the CMP signal goes missing or messy, the car can be hard to start, run rough, or drop into limp mode.

It’s not a scheduled service item, but it’s smart to give it a once-over when the bonnet’s up for regular servicing. Check the wiring and connector for brittle insulation, corrosion, or oil contamination. Because the sensor lives on the cylinder head near heat and oil vapour, keeping the connector clean and clipped in place goes a long way.

• Common signs it’s unhappy: extended cranking or no start, uneven idle, misfires, poor fuel economy, loss of power, and engine light with codes like P0340/P0341.
• Quick checks: scan for codes and live data, inspect the harness, and rule out timing issues if multiple correlation codes appear.

Replacement is straightforward for a competent DIYer, but many owners prefer a workshop. Use an OE-quality sensor, lightly oil the O-ring, and avoid overtightening the retaining bolt. Disconnect the battery before unplugging, refit the sensor square to avoid nicking the seal, then clear codes and check live data. A short road test to confirm stable cam/crank correlation and restored MIVEC operation is good practice. There’s no preset replacement interval—fit a new sensor when faults, test results, or damage call for it.

• Where it sits: typically on the cylinder head near the timing cover on the intake side. Some variants may use more than one sensor for precise control.
• Best practice: keep oil leaks under control, protect the loom from rubbing, and don’t wash the area with aggressive cleaners.

FAQs

Where is the camshaft sensor on a 2017 Lancer?
On most 2.0L and 2.4L petrol models, it’s mounted on the cylinder head near the timing chain cover on the intake side. Access is from the top of the engine with the engine cover off. Some variants may have an additional sensor for the exhaust cam.

Can the camshaft sensor be cleaned, or does it need replacing?
If it’s just light oil film or dust on the tip or connector, a gentle wipe and contact cleaner can help. If the sensor is generating fault codes, has internal failure, or shows a poor signal in diagnostics, replacement is the fix—there’s no internal service.

What fault codes point to a bad camshaft sensor?
Common ones include P0340 (Camshaft Position Sensor Circuit) and P0341 (Camshaft Position Sensor Range/Performance). You may also see cam/crank correlation codes if timing has jumped, so it’s worth confirming the timing chain and related hardware are healthy.