Parts for your 2021 Mitsubishi Asx-Camshaft sensor

2021 Mitsubishi ASX Camshaft Sensor — What It Does and When to Service It

Technical sources confirm the 2021 Mitsubishi ASX is fitted with a camshaft position sensor. The Mitsubishi Motors Workshop Manual for RVR/ASX/Outlander Sport (2019–2021, Engine Electrical/ECM sections) details the Camshaft Position (CMP) sensor, related diagnostics (including DTCs P0340/P0341), and its role in MIVEC timing and sequential fuel injection. Mitsubishi’s ASA electronic parts catalogue for GA-series ASX models in AU/NZ also lists a “Sensor, Camshaft Position,” and trade databases such as AllData/Mitchell1 include test and replacement procedures for the 2.0-litre MIVEC petrol. So yes—this part is relevant and used on the 2021 ASX.

On a 2021 ASX, the camshaft sensor lets the engine computer know exactly where the cam is in its rotation. That timing data is crucial for quick starts, clean idle, crisp throttle response and spot-on fuel injection and ignition, especially with Mitsubishi’s MIVEC variable valve timing doing its thing. Without a good signal, fuelling and spark can be out of sync, leading to rough running or a crank-no-start.

It’s not a scheduled replacement item, but it pays to give it some attention during regular servicing. Under the bonnet, the sensor sits at the timing chain end of the cylinder head, usually beneath the plastic engine cover. While the engine oil is changed, it’s smart to scan for codes and glance at the sensor harness for rubbing, oil seepage or brittle plugs. Using the correct oil grade and keeping change intervals on time helps keep the sensor tip clean because excessive varnish and sludge can interfere with its signal.

If the ASX throws a check engine light with P0340/P0341, shows hard starting, random stalling, lumpy idle, or poor fuel economy, the camshaft sensor or its wiring could be the culprit. Before replacing, rule out basics: low battery voltage, corroded connectors, or a stretched/loose timing chain issue flagged by other codes.

Replacement is straightforward for a competent home mechanic: disconnect the battery, pop off the engine cover, unplug the sensor, remove the retaining bolt, and ease the sensor out. Lightly oil the new O-ring, seat the new sensor, refit the bolt and connector, then clear codes and road test. Use a quality OE-equivalent sensor—cheap knock-offs can cause intermittent faults that’ll drive anyone mad. Most workshops will knock this over in well under an hour, and it’s a relatively low-cost fix that restores smooth running and reliability for many more kilometres.

• Typical symptoms: hard starting, misfire/rough idle, stalling, sluggish performance, higher fuel use, check engine light (P0340/P0341).
• Good practice: keep to oil service intervals, inspect harness and connectors, scan for codes during routine servicing.

Where is the camshaft sensor on a 2021 Mitsubishi ASX?

It’s mounted on the cylinder head at the timing chain end, usually under the plastic engine cover. From the front of the car, look towards the upper right area of the engine near the cam cover—one electrical plug and a single bolt hold it in.

Does the camshaft sensor need regular replacement?

No set interval. It’s replaced when faulty or contaminated, typically flagged by codes like P0340/P0341 or symptoms such as hard starts and stalling. Keeping the correct oil and intervals helps it live a long life.

Can a failing camshaft sensor cause damage if ignored?

It usually won’t damage the engine directly, but it can cause poor running, stalling, and increased emissions. Prolonged misfires can stress the catalytic converter, so it’s best to diagnose and sort it promptly.