Engine Camshaft Position Sensor Guide for 2004-2006 Lexus ES330
Resolve stalling, rough idling, and starting problems by understanding and choosing the right camshaft position sensor for your ES330.
- Your ES330 has two camshaft sensors; a trouble code (like P0340 for Bank 1 or P0345 for Bank 2) will identify which one is failing.
- Denso is the original equipment manufacturer, making it a top choice for aftermarket replacement to ensure reliability.
- The front sensor (Bank 2) is an easy DIY replacement, while the rear sensor (Bank 1) is much more difficult to access.
- Symptoms of failure include a check engine light, stalling, rough idle, and difficulty starting the engine.
Symptoms of a Failing Camshaft Position Sensor
When a camshaft position sensor starts to fail, the signal it sends to the engine's computer can become weak, intermittent, or stop completely. This confuses the computer, which can lead to noticeable driving problems. 🎬 Watch this video to see common symptoms of sensor failure. Because the sensor is critical for engine timing, a bad sensor can even prevent the car from starting at all. Often, sensor failure is caused by exposure to high engine temperatures over many years.
Common symptoms include:
- Check Engine Light: This is often the first sign. The computer will store a Diagnostic Trouble Code (DTC), most commonly P0340, P0345, or related codes.
- Difficulty Starting: The engine may crank for longer than usual before starting, or it might not start at all.
- Engine Stalling: The engine may unexpectedly shut off while driving, sometimes after it has warmed up.
- Rough Idle and Misfires: The car may vibrate or shake at a stop, and the engine can run poorly.
- Poor Acceleration: You might notice a lack of power or hesitation when you press the gas pedal.
Known Issues and Technical Service Bulletins (TSBs)
For the 2004-2005 ES330, Lexus issued a TSB (#00605) for a Malfunction Indicator Lamp (Check Engine Light) with code P0346, which is related to the camshaft position sensor circuit. This indicates that Lexus is aware of potential issues with this system. While a TSB is not a recall, it provides dealers with specific diagnostic and repair procedures. There was also a recall for the crankshaft pulley (NHTSA #11V539000), a separate part in the same area of the engine. Problems with the pulley can sometimes be confused with sensor issues due to the similar location and symptoms like engine noise.
Choosing the Right Aftermarket Sensor
When replacing a critical sensor, part quality matters. For the Lexus ES330, the original equipment (OEM) manufacturer for many electronics is Denso. Choosing an aftermarket Denso sensor will provide the same quality and performance as the part from the dealership, often at a lower cost. Other brands offer a balance of quality and value.
Brand Quality Tiers
- OEM-Equivalent (Best): Denso, Delphi, and NGK are top-tier brands. They are often original suppliers to manufacturers and build parts to meet or exceed factory specifications. Delphi, in particular, is known for sharing design elements with factory parts.
- Quality Aftermarket (Better): Brands like Standard Ignition (Standard Motor Products), Beck Arnley, and Holstein offer reliable performance and are well-regarded in the industry. They focus on high-quality materials and often provide warranties, like Holstein's 3-year/36,000-mile warranty.
- Budget-Friendly (Good): Dorman, URO Parts, and other value-focused brands can be a good choice for budget-conscious repairs. However, forum discussions suggest that for critical electronic sensors, quality can sometimes be inconsistent with budget brands. It's often recommended to stick with OEM or top-tier aftermarket brands for sensors that can leave you stranded.
Pro Tip: Your ES330 has two camshaft position sensors: one for Bank 1 (rear, near the firewall) and one for Bank 2 (front, near the radiator). The front sensor (Bank 2) is much easier to access and replace. The rear sensor (Bank 1) is more difficult to reach. While you can replace just the one that has failed, if one has failed due to age, the other may not be far behind.
Estimated Replacement Costs
The cost can vary depending on the brand you choose and whether you perform the labor yourself. The front sensor is a relatively simple DIY job, while the rear sensor is more labor-intensive.
| Part/Service | Estimated Cost |
|---|---|
| New OEM Sensor (Each) | $165 - $225 |
| New Aftermarket Sensor (Each) | $27 - $74 |
| Shop Labor (Per Sensor) | $85 - $150+ (Cost is higher for the rear Bank 1 sensor) |
Frequently Asked Questions (FAQ)
How many camshaft position sensors does the 2004-2006 ES330 have?
The 3.3L V6 engine in your ES330 has two camshaft position sensors. One is for Bank 1 (the cylinder head closer to the firewall/cabin) and the other is for Bank 2 (the cylinder head closer to the radiator). They are not interchangeable.
Which sensor is for Bank 1 vs. Bank 2?
Diagnostic trouble codes will tell you which bank has the issue. Code P0340 refers to Bank 1, while P0345 refers to Bank 2. Bank 2 is the front sensor and is easy to see and access after removing the plastic engine cover. Bank 1 is the rear sensor and is much harder to get to.
🎬 See how to replace the Bank 1 and Bank 2 sensors.Can I replace this sensor myself?
Yes, for many DIYers. The front sensor (Bank 2) is held by a single 10mm bolt and is accessible from the top of the engine. The rear sensor (Bank 1) is more challenging due to its location behind the engine. Basic hand tools are all that's required for the front sensor.
🎬 Follow these seven easy steps to replace your sensor.What's the difference between a camshaft and crankshaft sensor?
They work together, but measure different things. The camshaft sensor tracks the camshafts (which open and close the valves), while the crankshaft sensor tracks the crankshaft (which is moved by the pistons). The computer needs both signals to be in sync for the engine to run correctly. A common ordering mistake is buying a camshaft sensor when you need a crankshaft sensor, or vice-versa.
Helpful Videos
Technical Specifications
OEM Part Numbers: 90919-05054 90080-19014
The 3.3L 3MZ-FE V6 engine uses two Hall-effect type camshaft position sensors, one for each cylinder bank. Bank 1 (rear) and Bank 2 (front) sensors are different parts and are not interchangeable.
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The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
- Lexus ES330: