Parts for your 2007 Mitsubishi Lancer-Camshaft sensor

2007 Mitsubishi Lancer camshaft sensor — what it does and how to look after it

Based on Mitsubishi Motors workshop manuals for the CH (2002–2007) and CJ (late‑2007 onwards) Lancer, plus Autodata and common OBD‑II DTC references (P0340/P0341), the 2007 Mitsubishi Lancer does use a camshaft position sensor (CMP). CH models with the 4G94/4G69 engines run a single CMP at the cylinder head, while late‑2007 CJ models with the 4B11 engine use two CMP sensors (intake and exhaust) for MIVEC control. So yes — the camshaft sensor is absolutely relevant on a 2007 Lancer.

The CMP’s job is to tell the ECU exactly where the camshaft sits relative to the crank. That lets the car fire the spark and inject fuel at the right moment, control variable valve timing (where fitted), start cleanly, and keep emissions tidy. When it goes out of whack, the ECU loses that precise cam timing info and the Lancer can get grumpy.

Typical signs of a crook cam sensor include:

• Hard starting, misfires, rough idle, or stalling at low speeds
• Flat spots and poor fuel economy
• Check Engine Light with codes like P0340/P0341

For servicing, the sensor itself isn’t a “regular replacement” item, but it’s smart to give it some attention when doing plugs, timing belt/chain checks, or major services:

• Inspect the connector and wiring for oil intrusion, corrosion, or brittle insulation, clean and refit firmly.
• If the engine is a CH 4G94/4G69 with a timing belt, stick to the logbook intervals — a stretched or mis‑indexed belt can trigger cam/crank correlation faults even if the sensor is fine.
• On the CJ 4B11, there are two CMPs, keep both clean and ensure the loom isn’t rubbing on the cam cover.
• Use quality OEM‑equivalent sensors, cheap copies can cause intermittent faults and hot‑soak no‑starts.
• When replacing, disconnect the battery, remove the retaining bolt, swap the O‑ring if supplied, torque to spec, and clear codes. No special relearn is usually needed, the ECU will adapt after a short drive.

If faults persist after replacement, a proper scan and scope check of the cam/crank signals is worthwhile, as wiring issues or mechanical timing problems can mimic a failed sensor. Referenced sources: Mitsubishi Motors Workshop Manuals (CH/CJ Lancer), Mitsubishi ASA parts catalogue, Autodata, and SAE J2012 OBD‑II DTC listings.

Popular questions about 2007 Mitsubishi Lancer camshaft sensors

Where is the camshaft sensor located on a 2007 Lancer?
On CH models (4G94/4G69), it’s mounted on the cylinder head at the timing belt end. On late‑2007 CJ models with the 4B11, there are two — both on top/front of the head, one for the intake cam and one for the exhaust cam.

Can a camshaft sensor be cleaned, or does it need replacing?
You can clean the connector and the sensor’s mounting face, and fix any oil leaks into the plug. If the sensor’s electronics are failing or it’s logging P0340/P0341 consistently, replacement is the reliable fix.

Is it safe to keep driving with a faulty camshaft sensor?
It might run, but you risk hard starts, stalling, and poor performance. It’s best to sort it promptly to avoid getting stranded and to protect the engine and catalytic converter.