Parts for your 2004 Toyota Camry-Camshaft sensor

2004 Toyota Camry camshaft sensor — what it does and how to look after it

Based on Toyota’s factory Repair Manual for the ACV30/MCV30 series (2002–2006), the 2004 Camry is fitted with a camshaft position sensor across its engines (2AZ‑FE 2.4‑litre four-cylinder and the V6 options). The Toyota Electrical Wiring Diagram shows the camshaft position sensor circuit to the Engine Control Module, and the Toyota Electronic Parts Catalogue lists the sensor as a serviceable item for these engines. Related Toyota diagnostic coverage includes DTCs such as P0340/P0341 for camshaft position circuit faults.

On a 2004 Toyota Camry, the camshaft sensor tells the ECU exactly where the cam is in its rotation. That timing info lets the ECU fire the injectors in sequence, run variable valve timing (VVT‑i) properly, and keep spark and fuelling tidy under all loads. It also helps the ECU distinguish true misfires from rough running. If the sensor goes out of whack, the car may be sluggish, hard to start, or throw a check‑engine light.

It’s not a scheduled replacement item, but after a fair few kilometres and plenty of Aussie or Kiwi heat cycles, the sensor’s internal electronics or its O‑ring can age. On the 2.4‑litre, the sensor lives at the timing chain end of the cylinder head under the engine cover. On the V6, it sits at the end of the head near the timing belt cover, some variants run a second sensor on the opposite bank. Access is usually straightforward with a 10 mm socket and a gentle hand.

Typical signs it’s unhappy include:

• Check‑engine light and codes like P0340/P0341
• Long cranking, stalling, or rough idle
• Flat spots, poor fuel economy, or erratic VVT‑i behaviour

Service tips the workshop will appreciate:

• Inspect the connector and loom for heat‑hardening, oil wicking, or green corrosion, clean and secure the plug.
• If removing the sensor, replace the O‑ring and lightly oil it on refit to avoid nicks and leaks.
• Use a quality replacement (genuine or reputable aftermarket) and tighten the hold‑down bolt to factory spec—just snug, not gorilla tight.
• After replacement, clear codes and road test, no ECU reprogramming is normally needed.
• If faults persist, verify crank sensor signals and timing alignment before throwing more parts at it.

Look after the basics—clean connectors, secure wiring, and fresh engine oil—and the Camry’s cam sensor will usually go the distance without fuss.

Where is the camshaft sensor on a 2004 Camry?

On the 2.4‑litre 2AZ‑FE, it’s mounted at the timing chain end of the cylinder head, under the plastic engine cover. On V6 models, it’s positioned at the end of a cylinder head near the timing belt cover, certain versions have a second sensor on the other bank. A torch and a small mirror make spotting the mounting bolt and connector much easier.

Can it be driven with a faulty camshaft sensor?

It may still run, but starting can be hit‑and‑miss and it can stumble or stall. Continued driving risks poor fuel economy and potential catalyst damage if misfires crop up. Best bet: get the fault codes scanned, confirm it’s the sensor or wiring, and sort it sooner rather than later.

Does a new camshaft sensor need ECU programming?

No. Once fitted correctly, the ECU reads the signal and carries on. Clear any stored codes and adaptations, then take a short drive so the ECU can re‑learn idle and fuel trims if needed.