Parts for your 2018 Mitsubishi Asx-Crank angle sensor

2018 Mitsubishi ASX crank-angle-sensor: purpose, servicing and replacement

Based on technical sources, the 2018 Mitsubishi ASX is fitted with a crank-angle-sensor (commonly called the crankshaft position sensor). The Mitsubishi Motors workshop manuals for ASX/RVR/Outlander Sport (petrol 4B11/4A92 and diesel 4N14 engines) specify and test this sensor within Engine Electrical/ECM diagnostics, and the Mitsubishi ASA/EPC parts catalogue lists a dedicated crankshaft position sensor for these engines. Trade data services such as Autodata and Haynes also document CKP sensor locations, wiring, and fault codes for 2018 ASX models.

On the 2018 ASX, the crank-angle-sensor watches a toothed wheel on the crankshaft and tells the ECU exactly where the crank is and how fast it’s spinning. That info is the backbone for spark timing, injector pulses, idle stability, and on many variants, coordination with cam timing. If the signal drops out, the engine can be hard to start, stumble, or cut out altogether, and the check engine light will likely pop up.

It’s not a scheduled service item in Australia or New Zealand, but it pays to keep an eye on it during regular servicing—especially if there are symptoms like intermittent no-start, misfiring at low revs, random stalling at the lights, or a dead tachometer. Common OBD-II codes tied to this part include P0335–P0339. Oil contamination on the connector, a cracked sensor body, or damaged wiring near the plug are all red flags.

Replacement is straightforward for most variants and a good DIY for those comfortable with basic tools, though many owners prefer a workshop. Typical steps include disconnecting the battery, unclipping the connector, removing the retaining bolt, swapping the sensor and O-ring/seal, then routing the harness correctly before clearing codes and doing an idle relearn if specified by service data. The mounting air gap is fixed by design on the genuine sensor, so no shims or adjustments are usually required. Always check the workshop manual for exact access points—on the 2.0L petrol the sensor is mounted to the block reading the crank reluctor, on the diesel it’s similarly positioned to face the crank wheel. Access is often easiest from under the vehicle with the RH front wheel off and the inner guard loosened.

For best results: use a genuine or OE-equivalent sensor, keep the connector clean and dry, inspect nearby looms for abrasion, and confirm related basics (battery voltage and engine earths). After fitting, scan for live CKP RPM and confirm clean cranking signal before road testing. That’s the tidy, reliable way to keep an ASX happy over many kilometres.

• Key symptoms: hard starting, random stalling, rough idle, no tach signal, MIL on.
• Likely codes: P0335, P0336, P0337, P0338, P0339.
• Good practice: replace the O-ring, route the loom correctly, and clear/verify codes.

FAQ

Where is the crank-angle-sensor on a 2018 Mitsubishi ASX?
On most 2.0L petrol models it’s mounted on the engine block facing the crankshaft reluctor, typically accessed from underneath near the transmission end of the block. On diesel variants, it’s similarly mounted to read the crank wheel. Access can be easier with the right‑hand front wheel off and the inner guard loosened.

What fault codes point to a bad crank-angle-sensor?
Common codes are P0335 (Crankshaft Position Sensor “A” Circuit) through P0339 (intermittent). These may come with no-start, stalling, or rough running. Always confirm wiring integrity and power/earth to the sensor before condemning the part.

Does the crank-angle-sensor need routine replacement?
No. It isn’t a scheduled replacement item. Replace it only if it’s failed testing or shows damage. During services, a quick visual for oil ingress, cracked housings, or chafed wiring is smart preventative care.