Parts for your 2019 Mitsubishi Asx-Camshaft sensor

2019 Mitsubishi ASX Camshaft Sensor — What it does and when to replace it

Yes, the 2019 Mitsubishi ASX is fitted with a camshaft position sensor (often called a CMP sensor). This isn’t optional kit — it’s part of the engine management on both the petrol 4B11/4B12 MIVEC engines and the diesel variants. Mitsubishi’s Workshop Manual for ASX/RVR/Outlander Sport (2016–2020, Engine Electrical/ECM sections) details the CMP’s role and test procedures, and the Mitsubishi ASA/EPC parts catalogue lists the camshaft sensor as a service part for 2019 models.

On this ASX, the camshaft sensor tells the ECU exactly where the intake cam is in its rotation. That timing info lets the ECU fire the injectors in the right sequence, control ignition timing cleanly, and run MIVEC variable valve timing properly. It’s especially important for quick starts, smooth idle, decent fuel economy and emissions compliance. If the signal goes missing or messy, the car can crank longer, idle rough, hesitate, drop into limp mode, or light the MIL with codes like P0340/P0341.

It’s not a routine replacement item, but it is worth a look during services. Check the wiring loom near the cylinder head for chafe, heat damage or oil wicking, and make sure the connector seal is intact. Oil contamination from a leaking rocker cover can get into the plug and upset the signal, so fix any seepage early.

• Common signs it’s on the way out: hard starting, misfires at low revs, poor fuel economy, intermittent stalling, and the check engine light with a cam correlation code.
• Basic fitment overview: under the bonnet, remove the engine cover, then find the sensor at the end of the cylinder head (intake cam side). Disconnect the plug, remove the retaining bolt, ease the sensor out, swap the O-ring, lightly oil the new seal, refit, and tighten to the workshop manual torque. Reconnect, clear codes, and road test.
• Use genuine or high-quality aftermarket sensors, cheap copies can give flaky signals that waste time on diagnostics.

If the ASX throws a cam/crank correlation code, check both the sensor and the timing chain condition/indexing before condemning parts. After replacement, most cars don’t need programming — the ECU will relearn once it sees a clean signal — but it’s smart to clear fault codes and monitor cam/crank sync data with a scan tool.

Where is the camshaft sensor on a 2019 ASX?

It’s mounted on the cylinder head at the intake cam end, under the engine cover. Look near the timing chain end, you’ll find a small two- or three-pin sensor held by a single bolt with a sealed O-ring.

Can it be driven with a dodgy camshaft sensor?

It might run, but expect hard starts, limp mode, or stalling. It’s not worth the risk — get it checked and sorted to avoid being stranded and to protect the catalytic converter from misfire damage.

Does a new camshaft sensor need programming?

Generally, no. Fit the new sensor, clear any fault codes, and the ECU will relearn as it sees stable signals. If issues persist, check wiring, timing, and sensor brand/fitment.