Parts for your 2022 Toyota Aqua-Camshaft sensor

2022 Toyota Aqua camshaft sensor — what it does and when to replace it

Yes, the 2022 Toyota Aqua is fitted with a camshaft position sensor. Technical sources that confirm this include Toyota’s Service Information (TIS) Repair Manual for the Aqua MXPK11 with the M15A‑FXE engine under the SFI/Engine Control section, where the “Camshaft Position Sensor” is specified for timing and VVT control, and the Toyota Electronic Parts Catalogue (Japan market) for MXPK11, which lists a camshaft position sensor for this engine family. Diagnostic references for this model also include DTCs P0340/P0341 for camshaft sensor circuit and performance, further indicating its use.

On this hybrid, the camshaft sensor is a small Hall‑effect unit mounted on the cylinder head that reads a timing wheel on the cam. The engine stops and starts frequently, so the ECU relies on this signal to pinpoint cam position instantly, fire the injectors in the right order, and command VVT‑iE/VVT‑i accurately. That’s how the Aqua achieves smooth restarts, crisp throttle response, lower emissions, and better fuel economy.

It’s not a scheduled service item, but it does live in a hot, oily spot. As part of routine servicing, it’s smart to give it a quick look: check the connector for looseness or corrosion, make sure the harness isn’t chafed, and look for oil seepage at the sensor’s O‑ring. Keeping the M15A‑FXE on the correct low‑viscosity oil (0W‑16) and a quality filter helps reduce sludge that can upset valve timing and sensor plausibility.

If the Aqua shows a long crank when the engine kicks in, runs roughly on restart, logs the MIL with P0340 or P0341, or feels hesitant when re‑engaging from EV mode, the camshaft sensor or its wiring is a usual suspect. Replacement is generally straightforward: disable Ready mode, disconnect the 12‑V battery negative terminal, avoid any orange high‑voltage cabling, unplug the sensor on the cylinder head, remove its retaining bolt, swap the O‑ring, and refit a genuine or OE‑quality unit. Clear codes and verify live data (cam/crank sync and VVT angles) with a scan tool. Most workshops can sort this quickly and it’s typically more economical to replace the sensor than to chase intermittent faults.

• Typical symptoms: MIL on (P0340/P0341), hard or no start, rough restarts, poor fuel economy, uneven idle, or stalling when the engine re‑engages.
• Good practice: inspect wiring and oil leaks each service, use correct oil to keep VVT and sensor readings stable.

FAQ

Where is the camshaft sensor on a 2022 Toyota Aqua?
The sensor sits on the cylinder head, typically at the intake side near the camshaft gear. It’s a small three‑wire sensor secured by a single bolt with an O‑ring seal. Access is usually from the top under the bonnet once the engine cover is off.

Because it reads a cam trigger wheel, correct fitment depth and a clean mounting face matter. If it’s removed, replace the O‑ring to prevent oil seepage.

What are common signs the Aqua’s camshaft sensor is failing?
Expect a check engine light with codes like P0340 or P0341, rough or delayed engine restarts from hybrid mode, misfires at idle, or a general loss of punch. Some drivers notice worse fuel use and occasional stalling as the engine cuts in.

Always check the connector and wiring first, heat and vibration can cause intermittent faults that mimic a bad sensor.

Does the camshaft sensor need replacing at a set interval?
No, there’s no fixed replacement interval. It’s a “replace on condition” item. If diagnostics confirm it’s out of spec or the signal is unstable, swap it out.

During services, a quick visual of the plug and harness, plus keeping to the correct oil spec, goes a long way to preventing issues that can throw cam/crank correlation faults.