Parts for your 2011 Mitsubishi Lancer-Camshaft sensor

2011 Mitsubishi Lancer Camshaft Sensor: What it does and when to replace it

Technical sources including the Mitsubishi Lancer Factory Service Manual (Engine Electrical/Engine Control sections), the Mitsubishi ASA parts catalogue, and standard OBD-II documentation for Lancer engines listing DTCs like P0340/P0341 and P0365/P0366 all confirm that the 2011 Mitsubishi Lancer is fitted with camshaft position sensor(s). Across the 2.0L, 2.4L and turbocharged variants, the engine management relies on one or two cam sensors to run MIVEC variable valve timing and to keep ignition and fuel timing spot on. So yes, the camshaft sensor is absolutely relevant to a 2011 Lancer.

On this model, the camshaft sensor monitors the exact position and speed of the camshaft(s) and feeds that info to the ECU. Working alongside the crankshaft sensor, it lets the engine fire injectors and spark at just the right moment and trims valve timing via MIVEC for smooth idle, solid torque and better fuel economy. If the sensor signal drops out or drifts, the ECU can’t trust cam timing, which can lead to hard starting, rough running, flat spots and a lit check engine lamp.

There’s no fixed service interval to replace a cam sensor on a Lancer—it’s a “as needed” item. That said, a quick look during regular servicing goes a long way. Under the bonnet, inspect the sensor connector and nearby harness for brittle insulation, oil wicking, or rub-through on the rocker cover. Keep the area clean so grit doesn’t foul the O-ring seal. If the light’s on with codes like P0340, P0341, P0365 or P0366, diagnose the wiring and sensor before blaming the timing hardware.

Replacement is straightforward for most home tinkerers: disconnect the battery negative, unplug the sensor, remove the retaining bolt, swap the O-ring if supplied, and refit, tightening to factory spec. Some 2011 Lancer engines use two sensors (intake and exhaust), so note which one you’re changing. After installation, clear any codes and let the engine idle so the ECU can relearn cam/crank correlation. No special programming is usually needed, but an idle learn may be recommended. Using a quality OEM-equivalent sensor helps avoid intermittent faults. If drivability issues persist, check for stretched timing chain/belt components, oil control solenoids and poor earths before replacing more parts.

• Common symptoms of a failing cam sensor: hard starting, rough idle, loss of power, poor economy, and a check engine lamp.
• Typical repair time: about 30–60 minutes, depending on access and whether intake or exhaust side is being serviced.

Popular questions

Where is the camshaft sensor on a 2011 Mitsubishi Lancer?
On most 2011 Lancer engines it’s mounted on the cylinder head near the camshaft ends, with the connector facing the top or side of the head. Some variants have two—one for the intake cam and one for the exhaust cam—so there may be a sensor at each end of the head. Access is from the top under the engine cover.

Can you drive a 2011 Lancer with a faulty camshaft sensor?
It might start and run, but it can stall, hesitate or go into limp mode. Prolonged driving with a bad signal can increase fuel use and risk catalyst damage. Best bet is to diagnose and sort it promptly so it doesn’t snowball into bigger repairs.

Do camshaft sensors need programming after replacement?
Generally, no coding is required. The ECU self-learns the cam/crank relationship, just clear any fault codes and let it idle for a short period. Some workshops perform an idle relearn as good practice. If codes return, re-check wiring, connectors and timing components.