Chevrolet Impala Engine Camshaft Position Sensor (2014-2020)
Solve rough idling and starting problems in your Impala by understanding and choosing the right camshaft position sensor.
- Your Impala has multiple camshaft sensors: two on the 2.5L 4-cylinder and four on the 3.6L V6.
- Common fault codes include P0340, P0341, P0365, and P0366. Always confirm the code before ordering parts.
- ACDelco and Delphi are top-tier brands for reliability, offering OEM-level performance.
- Replacement is a simple DIY task, requiring only basic tools like a 10mm socket.
Understanding Camshaft Position Sensor Failure in Your Impala
A failing camshaft position sensor in a 2014-2020 Chevrolet Impala can cause a range of frustrating issues. Since this sensor is vital for engine timing, any malfunction directly impacts how your car runs. Symptoms can appear suddenly and may include a Check Engine Light, difficulty starting the engine, rough idling, and even stalling. These problems occur because the engine's computer is guessing the camshaft's position, leading to inefficient fuel and spark delivery.
How Many Sensors Does My Impala Have?
The number of camshaft position sensors depends on your engine. The 3.6L V6 engine has four identical sensors (two for intake, two for exhaust), while the 2.5L 4-cylinder engine has two (one intake, one exhaust). It's often a good practice to replace them in pairs (both intake or both exhaust) or all at once, especially on higher-mileage vehicles, to ensure consistent performance.
Choosing the Right Aftermarket Sensor
When replacing a camshaft position sensor, you have several brand choices. The quality can range from OEM-equivalent to value-oriented options.
- Top Tier (OEM-Equivalent): ACDelco is the original equipment manufacturer for GM, making it a guaranteed fit and function for your Impala. Delphi is another highly respected brand that often manufactures original parts for GM and other automakers, offering similar quality and reliability.
- Quality Aftermarket: Brands like NGK/NTK, Hitachi, and Standard Ignition (Standard Motor Products) have a strong reputation for producing reliable electronic components that meet or exceed OEM specifications. They are excellent alternatives to the dealer part.
- Value-Oriented: Dorman is a well-known aftermarket brand that provides cost-effective solutions. While generally reliable, quality can sometimes be inconsistent compared to top-tier brands. Other brands like Spectra, Walker Products, and Holstein offer functional replacements at a competitive price point, making them suitable for budget-conscious repairs.
Pro Tip: Before replacing the sensor, inspect the wiring and connector for any signs of damage or oil contamination, especially from a leaking power steering pump which can drip onto the sensor on some engine configurations. A bad connection can mimic the symptoms of a failed sensor.
Cost of Replacing a Camshaft Position Sensor
The cost can vary depending on the brand and whether you do the work yourself. The job is straightforward for a DIY mechanic.
| Part Type | Typical Cost |
|---|---|
| New Aftermarket Sensor | $24 - $83 |
| New OEM (ACDelco) Sensor | $45 - $90 |
| Shop Labor | $60 - $120 |
Frequently Asked Questions
Can I replace the camshaft position sensor myself?
Yes, this is a very DIY-friendly job. On both the 2.5L and 3.6L engines, the sensors are accessible on the top or side of the engine. The only tool typically needed is a 10mm socket. The process involves disconnecting the battery, unplugging the electrical connector, removing a single bolt, and swapping the old sensor for the new one. Always apply a little fresh engine oil to the new sensor's O-ring before installation.
Are all the camshaft sensors on the 3.6L V6 engine the same?
Yes, for the 2014-2020 Impala with the 3.6L V6, all four camshaft position sensors are identical and use the same part number, which simplifies ordering.
What happens if I don't replace a bad camshaft sensor?
Ignoring a failing sensor can lead to worsening symptoms like poor fuel economy, engine misfires, stalling, and potentially a no-start condition where the car won't start at all. It can also put extra stress on other engine components over time.
Are there any recalls for this part on my Impala?
Currently, there are no specific recalls from the NHTSA for the camshaft position sensor on the 2014-2020 Chevrolet Impala. However, GM has issued Technical Service Bulletins (TSBs) related to camshaft position codes. For example, TSB PI1007 addresses a P0341 code on the 2.5L engine that may be stored without turning on the check engine light, and recommends simply clearing the code if no symptoms are present. TSB PIP5096C addresses various cam actuator codes (P0011, P0014, etc.) on the 3.6L engine that may appear without any drivability issues.
Technical Specifications
OEM Part Numbers: 12684186 12674704
The 2014-2020 Impala uses magnetic or Hall-effect type sensors. The 3.6L V6 (LFX) uses four identical sensors. The 2.5L 4-Cylinder (LKW) uses one intake and one exhaust sensor. Connectors are typically blade-style.
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.
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