Parts for your 2006 Toyota Caldina-Camshaft sensor

2006 Toyota Caldina Camshaft Sensor — What It Does and When To Replace It

Based on Toyota service literature and the Toyota Electronic Parts Catalogue for the T24-series Caldina (model years 2002–2007), the 2006 Toyota Caldina is fitted with a camshaft position sensor across its common engines, including the 1AZ-FSE (2.0 D-4), 2AZ-FE (2.4 VVT-i), and performance 3S-GTE. These sources show a dedicated “Sensor, Cam Position” used by the engine control module (ECM) for sequential fuel injection and VVT-i operation, so the camshaft sensor is absolutely relevant on this model.

On a 2006 Caldina, the camshaft sensor tracks the exact position and phase of the camshaft as it spins. The ECM pairs this signal with the crankshaft sensor to fire injectors and ignition at the right moment, and to command variable valve timing. The upshot is smooth starting, decent fuel economy, crisp throttle, and proper emissions control. If the sensor signal goes missing or flaky, the ECM can’t accurately tell which stroke the engine is on, and it’ll fall back to safe maps or struggle to run properly.

Owners will often first notice a check engine light, rough idle, hard starting when hot, misfires, or sluggish performance. A quick scan usually turns up a cam sensor correlation or circuit code. On the Caldina’s AZ-series engines, the sensor typically lives on the cylinder head near the timing chain end, on the 3S-GTE it’s mounted at the cam gear area. Replacement is straightforward: unplug, remove a single retaining bolt, ease out the sensor (there’s an O-ring), pop in the new one with a light smear of clean engine oil on the seal, and nip the bolt back up to the factory spec (around 8–10 N·m, always check the workshop manual for the exact torque).

• Service tip: if oil is wicking into the connector, renew the O-ring and clean the plug before refitting.
• Use a quality OEM or reputable aftermarket sensor, poor-quality units can cause intermittent faults.
• If the sensor fault persists, check wiring continuity to the ECM and the timing of the cam/crank (stretched chain or belt alignment on applicable engines can trigger correlation codes).
• No fixed replacement interval is listed, treat it as condition-based—replace when faulty or contaminated.

Look after it with regular oil changes and proper filters—clean oil helps keep the cam target and sensor face free of gunk, which keeps the signal tidy and the Caldina running sweet as.

Q: Where is the camshaft sensor on a 2006 Toyota Caldina?

It’s mounted on the cylinder head at the timing end. On AZ engines (1AZ-FSE, 2AZ-FE) it sits near the timing chain cover, on the 3S-GTE it’s by the cam gear area. Access is usually under the engine cover—unplug the connector and you’ll see the single retaining bolt.

Q: What are the common symptoms of a failing camshaft sensor?

Expect hard starting (especially hot), rough idle, sluggish acceleration, increased fuel use, and a check engine light. Scan tools often show cam/crank correlation or circuit faults. If the sensor is dying intermittently, it may stumble or stall randomly.

Q: Is it safe to keep driving with a dodgy camshaft sensor?

It may run, but it can stall, run rich, and lose power, which isn’t flash for safety or the catalytic converter. Best to diagnose early—confirm the fault, check wiring and the connector, and fit a quality replacement to avoid collateral issues.