Parts for your 2004 Toyota Hiace-Camshaft sensor

2004 Toyota Hiace camshaft sensor — does it have one, what it does, and when to service it

Short answer: yes, a camshaft sensor is fitted on most 2004 Toyota Hiace models relevant to Australia and New Zealand. Technical references such as the Toyota Electronic Parts Catalogue (EPC), Toyota Electrical Wiring Diagram (EWD) for the 200 series Hiace (late 2004-on), and workshop data platforms like Autodata and Bosch ESI[tronic] all list a separate Camshaft Position Sensor (often labelled “G2”) on the 1KD-FTV and 2KD-FTV D-4D diesels, and the 1TR-FE and 2TR-FE VVT-i petrol engines. Earlier carry-over Hiace variants with a distributor-based ignition (mostly pre-2004 J100-series) don’t have a standalone sensor because the cam signal is generated inside the distributor, but on the 2004-on KDH/TRH vans there’s a dedicated sensor at the cylinder head.

On a 2004 Hiace that’s fitted with one, the camshaft sensor tells the ECU exactly which stroke the engine is on. That lets the ECU run sequential fuel injection, control VVT-i on petrol models, and tidy up start-up and idle quality. Pairing the cam signal with the crank sensor gives clean timing data, so the van fires up quicker on frosty mornings and pulls smoothly under load.

When it comes to servicing, the camshaft sensor is a low-drama part, but it’s worth a look whenever the rocker cover area is open. The sensor lives near the front or side of the cylinder head (depending on engine), held by a single small bolt with an O-ring seal. Common signs it’s unhappy include intermittent hard starting, a stumble off idle, sudden loss of power, or the MIL popping on with codes like P0340 or P0341.

• Inspect the connector and wiring for oil wicking, brittle insulation, or loose pins.
• Check the O-ring for weeping, replace if there’s any hint of oil creep.
• If removing the sensor, wipe the tip clean and refit with a fresh O-ring lightly oiled, don’t overtighten the small retaining bolt.
• Use quality parts — cheapies can cause ghost faults that are painful to chase.

Replacement is straightforward with basic tools under the bonnet. Clear codes and verify live data after fitting. If faults persist, confirm crank sensor health and timing alignment, as the two sensors work as a pair.

FAQs

Where is the camshaft sensor on a 2004 Hiace?
On D-4D diesels (1KD/2KD) and VVT-i petrols (1TR/2TR), it’s mounted on the cylinder head near the front timing cover area, secured by a single bolt with an O-ring. Access is from the top with the engine cover/bonnet open.

What are the symptoms of a failing camshaft sensor?
Hard starting, uneven idle, flat spots, reduced power, higher fuel use, and a check-engine light. Diagnostic trouble codes often logged include P0340/P0341. Always check wiring and oil contamination before condemning the sensor.

Does every 2004 Hiace have a separate camshaft sensor?
Most late-2004 KDH/TRH (200 series) vans do. Some earlier, distributor-equipped Hiace models (mainly pre-2004 J100-series) don’t use a standalone sensor, as the cam signal is produced inside the distributor assembly.