Parts for your 2018 Toyota Vitz|yaris-Crank angle sensor

2018 Toyota Vitz/Yaris Crank-Angle-Sensor (Crankshaft Position Sensor)

Technical sources confirm the 2018 Toyota Vitz/Yaris is fitted with a crank-angle-sensor (commonly called the crankshaft position sensor or CKP). Toyota’s Repair Manual for the XP130/XP150 series (Engine – Crankshaft Position Sensor – DTC P0335/P0339), the Toyota Electrical Wiring Diagram (EWD) for 2018 Vitz/Yaris showing the CKP signal to the ECM, and Toyota’s genuine parts catalogue listing a “Sensor, Crank Position” for engines used in this model (including 1KR-FE, 1NR-FE, 1NZ-FE/2NR-FKE depending on market) all verify its presence and role.

On the 2018 Vitz/Yaris, the crank-angle-sensor keeps the engine computer in the loop on exactly where the crankshaft is and how quickly it’s spinning. That live data lets the ECM trigger spark and fuel precisely, keep idle stable, and sync with the cam sensor for clean starts and smooth power. If the CKP signal drops out, the car can be a no-start, misfire under load, or drop into limp mode. It’s one of those quiet heroes that only gets noticed when it plays up.

It isn’t a routine service item, but it deserves a look whenever the bonnet is up. A quick visual around the sensor and plug for oil wicking, frayed wiring, or loose clips goes a long way. A scan for fault codes like P0335/P0339 after any hard-start, stall, or cut-out helps catch issues early. Keeping oil leaks from the front crank seal in check also protects the sensor from contamination.

• Signs it may be unhappy: hard starting, intermittent stalling, rough idle, sudden loss of power, or the MIL on.

Replacement on these engines is straightforward: disconnect the battery, unplug the connector, remove the single retaining bolt, and ease the sensor out of the block or timing cover. Lightly oil the O-ring on the new genuine sensor, seat it squarely, and tighten the bolt to the factory spec from the Toyota manual. Clear codes and let the ECM relearn—usually a short drive with varied throttle does the trick. Most workshops will allow around an hour of labour, roadside replacement is possible but best done on a cool engine with safe access from beneath.

• Use a genuine or high-quality OEM-equivalent sensor for reliable signal.
• Protect the connector seal, don’t over-stretch the loom.
• If faults persist, scope-testing the CKP and cam signals is the next logical step.

FAQs

Where is the crank-angle-sensor on a 2018 Vitz/Yaris?
It’s mounted to the engine block/timing cover near the crank pulley area on these small Toyota petrol engines. From above, it’s usually tucked low at the front, from underneath, it’s easier to spot just behind the pulley with the loom leading to a two-pin or three-pin connector depending on engine. Access improves with the splash guard off.

Can a crank-angle-sensor be cleaned, or should it just be replaced?
If it’s simply got light debris or oil film, a careful wipe and fixing the source of the leak can restore a clean signal. However, internal faults (open circuit, weak output, heat-soak failure) won’t be cured by cleaning. If codes return or symptoms persist after inspection and wiring checks, replacement is the dependable fix.

Is it safe to keep driving with a dodgy CKP sensor?
Not really. Intermittent signals can cause stalling or a no-start at the worst time, and misfires can stress the catalyst. If the MIL is on with P0335/P0339 or the car’s cutting out, it’s wise to sort it promptly to avoid getting stranded.