Parts for your 2020 Toyota Prius-Crank angle sensor

2020 Toyota Prius crank-angle sensor (crankshaft position sensor)

Based on Toyota’s own technical literature, the 2020 Toyota Prius (ZVW50/51/55, 2ZR‑FXE) is fitted with a crank-angle sensor, commonly listed by Toyota as the Crankshaft Position Sensor (CKP). The Toyota Repair Manual (TIS) details the CKP’s role within the SFI system and sets fault codes like P0335/P0339 for related issues, and Toyota’s Electronic Parts Catalogue (EPC) lists the dedicated “Sensor, Crank Position” for this model. So yes—this part is absolutely relevant and used on the 2020 Prius.

On a hybrid like the 2020 Prius, the crank-angle sensor is the quiet achiever that keeps the petrol engine perfectly in sync with the hybrid system. It reads the exact position and speed of the crankshaft and feeds that to the engine control module (ECM), which then times fuel injection and ignition, manages variable valve timing, and coordinates those silky stop–start events with the motor–generator. Without a clean, reliable signal from the CKP, the engine can be slow to fire, run rough, or refuse to start—and the hybrid system won’t be able to hand off between EV and petrol power smoothly.

There’s no scheduled replacement for the crank-angle sensor, it’s a fit-and-forget item that’s only swapped when there’s a fault. That said, as part of routine servicing, a technician will often give the wiring and connector a once-over for oil contamination, heat damage, or a loose fit—simple checks that can save a headache later. If the dash lights up with a check engine lamp and codes such as P0335 or P0339, or the Prius cranks but won’t kick the engine into life, the CKP and its wiring are top suspects.

When replacement is needed, sticking with genuine or high-quality equivalent parts is wise. On the 2ZR‑FXE, access is straightforward with the car safely raised, the sensor seats into the block and seals with an O‑ring. Good practice includes:

• Powering the vehicle down completely and disconnecting the 12‑volt negative terminal, keep the smart key away from the car.
• Inspecting the harness and connector first—faults here can mimic a bad sensor.
• Lightly oiling the new O‑ring, seating the sensor squarely, and torquing to Toyota spec from the repair manual.
• Clearing codes and confirming a clean crank signal and stable idle on a scan tool.

A failing crank-angle sensor may cause intermittent stalling once hot, extended cranking, or the engine not engaging while the car tries to stay in EV mode. Left unchecked, it’ll eventually leave the Prius unable to start the petrol engine, which limits drivability as the hybrid battery state drops.

Popular questions

Does a 2020 Prius actually have a crank-angle sensor?
The 2020 Prius absolutely does. Toyota labels it the Crankshaft Position Sensor (CKP). Toyota’s Repair Manual (TIS) covers its operation within the SFI system, and diagnostic codes like P0335/P0339 specifically reference that sensor and circuit.

What symptoms point to a failing crank-angle sensor on a 2020 Prius?
Common signs are a check engine light, extended cranking or no start, rough running, or the petrol engine not engaging as it should. The hybrid system may try to keep the car moving on the traction battery, but once the battery’s low, the vehicle can’t sustain normal performance.

Is the crank-angle sensor a regular service item?
No. There’s no set interval—it’s replaced only if it fails or tests out of spec. During regular servicing, a quick inspection of the connector and harness for heat or oil damage is prudent, especially on higher‑kilometre vehicles.