A Guide to the Camshaft Position Sensor for the 2013-2016 Scion FR-S
Experiencing a check engine light or rough running? A faulty camshaft sensor could be the culprit in your FR-S.
- Your FR-S has four distinct camshaft position sensors; use an OBD-II scanner to identify the specific one that is failing before ordering a part.
- Owners of 2013 models should be aware of TSB S-SB-0013-14, as a sensor clearance issue may only require a shim, not a full sensor replacement.
- Symptoms like engine stalling can also be caused by the separate valve spring safety recall affecting 2013 models.
- Replacement is simple for DIYers, requiring only basic tools and access to the front of the engine.
Understanding Camshaft Sensor Issues in Your FR-S
A failing camshaft position sensor can cause a range of frustrating problems, from a simple check engine light to your engine stalling unexpectedly. In the 2013-2016 Scion FR-S, these sensors tell the computer exactly how to time the spark and fuel delivery. When a sensor's signal becomes weak or incorrect, the engine's rhythm is thrown off, leading to noticeable performance issues. Because there are four sensors, it's important to use an OBD-II scanner to read the specific trouble code, which will help you identify which sensor (intake/exhaust, left/right bank) is causing the problem.
Special Note for 2013 FR-S Owners: TSB S-SB-0013-14
If you own a 2013 Scion FR-S, be aware of Technical Service Bulletin S-SB-0013-14 (which replaced S-SB-0033-13). Some early production vehicles can throw camshaft sensor error codes (like P0340, P0345, P0365, etc.) due to incorrect clearance between the sensor and the camshaft, not because the sensor itself has failed. The official fix involves measuring this clearance and installing a specific shim to correct it. If you have a 2013 model, this should be investigated before you replace the sensor.
🎬 Watch this video to understand the 2013 clearance and shim issue.Symptoms of a Failing Camshaft Position Sensor
- Check Engine Light: This is the most common sign. Codes like P0340, P0341, P0345, or P0365 often point directly to a cam sensor circuit issue.
- Engine Stalling or Hesitation: The engine may stall while driving or idle roughly and shut off.
- Hard Starting: The vehicle may take longer than usual to start, or it may crank but fail to turn over.
- Reduced Power and Acceleration: You may notice the car feels sluggish or weak, especially under load.
- Poor Fuel Economy: Incorrect timing can cause the engine to burn more fuel than necessary.
OEM vs. Aftermarket Replacement Sensors
When it's time to replace a sensor, you have a choice between Original Equipment (OEM) and aftermarket parts. The OEM sensors for the FR-S are made by Denso, a brand known for high quality and reliability. Aftermarket sensors, such as the "Replacement" brand, offer a significant cost saving. For a critical engine sensor, many mechanics recommend using an OEM or premium aftermarket part to ensure longevity and proper function. However, a standard aftermarket sensor can be a good budget-friendly choice, especially if the low price is a key factor. It meets the original specifications but may not have the same long-term durability as an OEM Denso part.
Cost of Replacing a Camshaft Position Sensor
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $32.88 |
| New OEM (Denso) | $95 - $126 |
| Shop Labor | $61 - $90 |
| Total Estimated Cost (DIY) | $33 - $126 |
| Total Estimated Cost (Shop) | $94 - $216 |
Frequently Asked Questions (FAQ)
How many camshaft position sensors does my 2013-2016 FR-S have?
Your Scion FR-S has four camshaft position sensors. There is one for the intake camshaft and one for the exhaust camshaft on each side of the engine (Bank 1 and Bank 2).
Can I replace a camshaft position sensor myself?
Yes, this is a very DIY-friendly job. The sensors are located on the front timing cover of the engine and are each held in by a single bolt. The process involves disconnecting the battery, unplugging the electrical connector, removing the bolt, and swapping the old sensor for the new one.
🎬 See this walkthrough on how to test and replace the sensors.Are these symptoms related to the valve spring recall?
They can be. The 2013 FR-S was subject to a safety recall for engine valve springs that could fracture and cause an engine stall. While a bad cam sensor can also cause stalling, the valve spring issue is a mechanical failure inside the engine. If your 2013 model has not had the recall service performed, it is critical to have it checked by a dealer, as the remedy is free of charge.
What are the most common error codes for a bad cam sensor?
The most common code is P0340 (Camshaft Position Sensor 'A' Circuit Malfunction). However, a range of codes can appear, including P0341, P0345, P0346, P0365, and P0366, which help pinpoint which of the four sensors is having an issue.
🎬 Watch: Identifying which sensor matches your specific error code.Helpful Videos
Technical Specifications
OEM Part Numbers: SU003-00414 SU003-00413
The FA20 engine uses four hall-effect type sensors, one for each camshaft (Intake Left, Intake Right, Exhaust Left, Exhaust Right). They are mounted to the front timing cover.
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 FR-S: