Parts for your 2006 Toyota Highlander-Camshaft sensor

2006 Toyota Highlander Camshaft Sensor — What It Does and When to Replace It

Yes, the 2006 Toyota Highlander does use a camshaft position sensor. Toyota’s factory repair information for the 2AZ-FE (2.4L) and 3MZ-FE (3.3L V6) engines specifies a camshaft position sensor signal for sequential fuel injection and VVT-i control. The Toyota Electronic Parts Catalogue also lists camshaft position sensor(s) for both engines, and the model’s OBD-II diagnostics include camshaft sensor fault codes (e.g., P0340, P0345) documented in Toyota service literature. These technical sources confirm the part is relevant and fitted to 2006 Highlander variants.

On a 2006 Highlander, the camshaft sensor monitors camshaft position so the ECU can fire injectors and spark at the right time, and manage variable valve timing. That’s how it keeps the engine smooth, efficient, and easy on petrol. When the sensor goes out of spec, owners may notice hard starts, rough idle, flat spots under load, or the check engine light with cam-related fault codes.

During routine servicing, it’s worth giving the sensor area a quick look under the bonnet. Oil leaks from the rocker cover can wick into the connector and cause dodgy signals. A simple clean of the plug, checking the loom for chafing, and ensuring the sensor’s O-ring isn’t weeping can save hassles later. There’s no set replacement interval, but many techs see failures crop up around higher kilometres or after heat/contamination events.

If replacement’s on the cards, it’s a straightforward driveway job for most DIYers with basic spanners:

• Disconnect the battery negative.
• Unplug the sensor connector and remove the hold-down bolt.
• Twist the sensor gently to free the O-ring, then pull it out.
• Lightly oil the new O-ring, seat the sensor, and refit the bolt to manufacturer torque spec.
• Reconnect and clear any codes, then road test.

Symptoms pointing to a crook camshaft sensor include:

• Long crank or no start when hot
• Rough idle, misfire, or poor fuel economy
• Check engine light with P0340/P0345-series codes

Quality matters here—use a reputable aftermarket or genuine sensor, and always address any oil leaks that might have contributed to the failure. For the V6, note there are two banks, so the ECU’s bank-specific code will help identify which sensor is playing up. Keeping the connector clean and the harness supported will help the new unit last the distance.

Popular questions

Where is the camshaft sensor on a 2006 Highlander?
The 2.4L 2AZ-FE has the sensor mounted at the end of the cylinder head near the timing chain area. The 3.3L 3MZ-FE V6 uses two sensors—one on each bank—mounted near the cam ends. They’re reachable under the bonnet with basic hand tools.

Can you drive a 2006 Highlander with a bad camshaft sensor?
It might run, but starting can be hit-and-miss and performance may suffer. Prolonged driving with a failing sensor isn’t ideal, as it can trigger limp strategies and mask other issues. Best to diagnose the codes and sort it promptly.

How many camshaft sensors does my 2006 Highlander have?
The 2.4L four-cylinder typically has one. The 3.3L V6 generally has two—one per bank—to support VVT-i and accurate timing on both cylinder heads.