Engine Camshaft Position Sensor: A Guide for the 2016-2018 Fiat 500X
If your Fiat 500X is stalling, running rough, or showing a check engine light, a failing camshaft position sensor could be the culprit.
- A failing camshaft sensor will most often trigger a Check Engine Light with codes P0340 or P0344.
- Symptoms include stalling, hard starting, rough idle, and poor acceleration.
- The 2.4L engine has two sensors; replacement is a simple DIY job for many owners.
- For best results, choose an OEM-equivalent aftermarket brand like Bosch, Delphi, or NTK.
Is Your Fiat 500X Camshaft Position Sensor Failing?
When a camshaft position sensor starts to go bad, it sends incorrect or intermittent signals to the engine's computer. This can cause a range of noticeable problems. Ignoring these symptoms can lead to your vehicle not starting at all, which could be dangerous if it happens while driving.
Key Failure Symptoms:
🎬 See seven common signs of a failing camshaft position sensor.- Check Engine Light: This is often the first and most common sign. The computer will store a trouble code, most frequently P0340, P0342, or P0344. 🎬 Learn how to fix engine light codes P0340 through P0343.
- Engine Stalling: The engine may shut off unexpectedly while idling at a stoplight or, in more serious cases, while you are driving.
- Hard Starting or No Start: Your 500X might take longer than usual to start, or it may crank but refuse to turn over. This happens because the computer doesn't know when to deliver fuel and spark.
- Rough Idle and Misfires: The engine may shake or vibrate when stopped because the combustion process is disrupted.
- Reduced Power and Poor Acceleration: You may feel like the car is sluggish or hesitating, especially when trying to accelerate.
Known Issues & Recalls
While there are no specific recalls for the camshaft position sensor itself on the 2016-2018 Fiat 500X, there was a recall (NHTSA Campaign ID: 16V529000) for the 2016 model year involving the 9-speed automatic transmission. This recall addressed an issue where insufficient crimps in a transmission wire harness could cause the vehicle to unexpectedly shift to neutral. While not directly the camshaft sensor, it highlights the sensitivity of the vehicle's electronics. There are also Technical Service Bulletins (TSBs) related to PCM software updates that can address various engine performance issues, some of which can mimic sensor problems. Always ensure your vehicle's software is up to date.
Choosing the Right Aftermarket Sensor
For many electronic parts on modern Fiat and Chrysler vehicles, using the OEM (Original Equipment Manufacturer) part is a safe bet. However, high-quality aftermarket brands can offer similar performance at a better price. It's generally wise to avoid the cheapest, unbranded options, as they can fail prematurely.
Brand Quality Tiers
- OEM-Equivalent Brands: Brands like Bosch and Delphi often manufacture original parts for automakers and are widely considered to provide OE-level quality and reliability. They are an excellent choice for a dependable, long-lasting repair. NGK (NTK Sensors) is another top-tier brand known for its sensor technology.
- Trusted Aftermarket Brands: Standard Ignition (SMP) and Walker Products are well-established brands that produce reliable replacement parts that meet or exceed OEM specifications. They offer a good balance of quality and cost.
- Value-Oriented Brands: Brands like Dorman, Spectra, and Holstein provide a cost-effective solution. While they can be a good budget option, some professional technicians prefer to stick with OEM-equivalent brands for critical sensors to avoid potential comebacks.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket Part | $20.73 - $78.80 |
| New OEM (Mopar) Part | $35 - $75 |
| Shop Labor Cost | $37 - $54 |
| Total Professional Replacement | $71 - $129 |
Pro Tip: Check the Wiring First
Forum discussions with Fiat owners sometimes reveal that the problem isn't the sensor itself, but a damaged wire or corroded connector in the harness leading to it. Before replacing the sensor, take a moment to inspect the wiring for any visible cracks, melting, or green corrosion inside the plug. A simple wiring repair could save you the cost of a new part.
Frequently Asked Questions
Can I replace the camshaft position sensor myself?
Yes, this is a DIY-friendly job for most home mechanics. On the 2.4L engine, the sensor is typically located on the side of the cylinder head and held in by a single bolt. The main challenge is accessing it, which may require removing the engine cover. The replacement involves disconnecting the battery, unplugging the electrical connector, removing one bolt, and swapping the old sensor for the new one.
How many camshaft sensors does my 2016-2018 Fiat 500X have?
The 2.4L MultiAir engine used in the Fiat 500X has two camshaft position sensors, one for the intake camshaft and one for the exhaust camshaft. It is often recommended to replace them in pairs, though they can be replaced individually. The trouble code (e.g., P0340, P0344) can sometimes help identify which sensor or circuit is having an issue.
Is an OEM Mopar sensor better than aftermarket?
For critical electronic sensors, many mechanics prefer OEM (Mopar) parts or top-tier aftermarket brands like Bosch or Delphi. While value brands are cheaper, the risk of premature failure or incorrect readings can be higher. Given the relatively low cost of even a premium sensor, investing in a quality part is recommended to ensure the repair is done right the first time.
What happens if I ignore a bad camshaft sensor?
Ignoring the symptoms can lead to more significant problems. Your fuel economy will suffer, your car will fail an emissions test, and performance will continue to degrade. The most critical risk is the engine stalling while driving, which can be a serious safety hazard. Eventually, the sensor will fail completely, and your vehicle will not start.
Helpful Videos
Technical Specifications
OEM Part Numbers: 68080819AC 68080819AD 5033308AB 68080819AB
The sensor for the 2016-2018 Fiat 500X with the 2.4L engine is a 3-pin sensor with an oval-shaped connector.
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.
- Fiat 500X: