Parts for your 2009 Toyota Aurion-Camshaft sensor

2009 Toyota Aurion Camshaft Sensor — What It Does and How to Service It

Per Toyota technical references for the 2GR‑FE V6 (Toyota Repair Manual for XV40 Aurion/Camry, Toyota Electronic Parts Catalogue, and factory wiring diagrams), the 2009 Toyota Aurion is fitted with camshaft position sensors. In fact, it uses two — one for each cylinder bank — and the Engine Control Module relies on them to run Dual VVT‑i, control ignition and injection timing, and keep the engine starting cleanly and running smoothly. So a camshaft sensor is absolutely relevant and used on this model.

The camshaft sensor reads the exact position and speed of the camshaft and sends a precise signal to the ECM. Paired with the crank sensor, it lets the Aurion fire injectors at the right moment, adjust cam timing on the fly, and keep emissions and fuel economy on point. When a sensor drifts or fails, the ECM loses timing accuracy, which can mean longer cranks, rough idle, misfires, sluggish performance, higher fuel use, and sometimes limp mode.

• Common symptoms: hard starting, hesitant take‑off, rough idle, sudden stall, poor economy, and warning lamps.
• Typical fault codes: P0340/P0345 (cam sensor circuit) and sometimes correlation codes like P0016–P0019 if timing can’t be verified.

There’s no scheduled replacement interval for the Aurion’s cam sensors, they’re solid‑state and generally last a long time. As part of regular servicing, it’s smart to inspect the connectors under the bonnet for oil weep, brittle wiring, or loose plugs. On the transverse 2GR‑FE, the sensors are mounted at the back of the cylinder heads (firewall side), one per bank.

When replacement is needed, quality matters. Using a reputable OEM‑equivalent sensor, a fresh O‑ring, and correct seating will avoid repeat faults. A tech will usually confirm the issue with a scan tool and live data, check power/ground/signal with a multimeter (or oscilloscope if available), and rule out oil control valve or timing issues before fitting a new sensor.

• Handy tips:
  • Label left/right connectors — the two sensors look alike.
  • Lightly oil the new O‑ring so it seats without nicking.
  • Don’t over‑tighten the hold‑down bolt, snug is enough.
  • If correlation codes persist, inspect timing components and VVT‑i oil control valves.

How many camshaft sensors does a 2009 Toyota Aurion have?

The 2GR‑FE V6 in the 2009 Aurion runs two camshaft sensors, one on each cylinder bank. They provide real‑time cam position for Dual VVT‑i so the ECM can trim timing accurately across the rev range.

What are common signs the Aurion’s cam sensor is failing?

Expect longer cranks, rough idle, misfires, flat spots, and the check engine light. Scan tools often show codes like P0340/P0345. If correlation codes (P0016–P0019) appear, a technician will also check timing and the VVT‑i oil control system.

Can the Aurion run with a bad cam sensor?

It might start and run poorly, or not at all. The ECM may fall back to limited strategies, but drivability and fuel economy suffer and stalling risk increases. Prompt diagnosis and a proper fix are the go.