A Guide to the Engine Crankshaft Position Sensor for the 2004-2006 Scion xA
If your Scion xA is stalling or won't start, a bad crankshaft sensor is a likely cause.
- A stalling engine or a no-start condition combined with a P0335 code strongly points to a failed crankshaft position sensor.
- For this specific part on the Scion xA, using an OEM (Toyota/Denso) or high-quality OEM-equivalent (Hitachi, NTK) sensor is highly recommended to ensure compatibility and avoid repeat failures.
- Replacement is simple and can be done by a DIYer in under an hour with basic tools, making it an inexpensive repair if you do it yourself.
- There are no recalls or TSBs for this issue, meaning it is a standard wear-and-tear failure.
Is Your Scion xA Stalling? Understanding the Crankshaft Position Sensor
A failing crankshaft position sensor is a common reason for a 2004-2006 Scion xA to suddenly stall, struggle to start, or run poorly. This sensor provides critical data to your engine's computer. When it fails, it can leave you stranded. This guide explains the symptoms of a bad sensor and helps you choose the right aftermarket replacement.
Symptoms of a Failing Scion xA Crankshaft Sensor
When this sensor starts to go bad, your car will let you know. The most common sign is a Check Engine Light with the code P0335. Other major symptoms include:
- Engine Stalling: The engine may shut off unexpectedly while driving, often when coming to a stop or shifting from drive to park. This is a serious safety issue.
- No Start or Hard Start: The engine will turn over but won't fire up, or it may take many tries to get it started.
- Rough Idle and Misfires: The engine may run unevenly or feel shaky when stopped.
- Reduced Engine Power: You might notice the car feels sluggish or hesitates during acceleration.
P0335: The Telltale Code
The diagnostic trouble code P0335 specifically points to a malfunction in the crankshaft position sensor circuit. While this often means the sensor itself has failed, it can also be caused by damaged wiring or a bad connector. Always inspect the wiring leading to the sensor for any visible damage before replacing the part.
Choosing the Right Aftermarket Crankshaft Sensor
For many parts, aftermarket options are a great value. However, for critical electronics on the Scion xA, quality matters significantly. A forum user reported trying both a Dorman and a Delphi sensor to fix a P0335 code, with both parts either not fitting correctly or failing to solve the stalling issue. The problem was only resolved by installing a genuine OEM Toyota part. This suggests the xA's computer is sensitive to the precise signal from the sensor.
Here is a breakdown of available brands:
- OEM (Toyota/Denso): This is the most recommended option for guaranteed fit and function. It costs more but eliminates the guesswork.
- OEM-Equivalent (Hitachi, NGK/NTK): Brands like Hitachi are often the original manufacturer for Japanese automakers and are considered a top-tier choice that balances quality and cost. NGK (under their NTK sensor brand) is also highly reputable.
- Standard Aftermarket (Delphi, Standard Ignition): These are well-known brands that offer a limited-lifetime warranty. While generally reliable, be aware of the specific issues reported with a Delphi sensor on an xA.
- Economy Brands (Walker Products, Global Parts): These are the most affordable options. They can be a viable choice for a tight budget, but quality and longevity can be inconsistent.
Replacement Cost
Replacing the crankshaft position sensor is a straightforward job. The part itself is affordable, and labor costs are low due to the easy access.
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Toyota/Denso) | $110 - $145 |
| New Aftermarket | $27 - $91 |
| Shop Labor | $75 - $150 |
| Total Professional Replacement | $102 - $295 |
Frequently Asked Questions (FAQ)
Where is the crankshaft position sensor on a 2004-2006 Scion xA?
The sensor is located on the front of the engine block, down low near the main crankshaft pulley. You can access it by removing the front passenger-side wheel and a plastic splash shield. It is held in place by a single 10mm bolt.
Can I replace the Scion xA crankshaft sensor myself?
Yes, this is a DIY-friendly job for someone with basic tools. After safely lifting the front of the car and removing the wheel, the sensor is easy to reach and replace. The entire job can take less than an hour.
Are there any recalls for this part?
No, there are no recalls or technical service bulletins (TSBs) from Toyota or Scion related to the crankshaft position sensor for the 2004-2006 Scion xA.
Do I need to reset the computer after replacing the sensor?
After replacing the sensor, the P0335 trouble code should be cleared from the computer using an OBD-II scanner. If you don't have a scanner, disconnecting the car's battery for about 15 minutes will also reset the system. The check engine light should then stay off if the replacement was successful.
Technical Specifications
OEM Part Numbers: 90919-05043 90919-A5004 90919-05070 90919-05087
The sensor is a magnetic or Hall effect type that reads teeth on a reluctor wheel mounted to the crankshaft to determine its speed and position. It is located on the lower front of the engine near the main pulley.
We Have This Part in Stock
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.
- Scion xA: