Chevrolet SS Engine Camshaft Position Sensor Guide (2014-2017)
Keep your LS3-powered SS running strong by understanding this critical engine sensor.
- A failing camshaft position sensor will trigger a Check Engine Light with codes like P0340 or P0341.
- Symptoms include stalling, hard starting, rough idle, and reduced power.
- The sensor is located on the front timing cover of the LS3 engine and is easy to replace for a DIYer.
- For best results, use an OEM (ACDelco) or OEM-equivalent (Delphi) brand sensor.
Symptoms of a Failing Camshaft Position Sensor
A bad camshaft position sensor can cause noticeable problems in your Chevrolet SS. Because the sensor's data is critical for engine timing, a weak or failed signal can disrupt performance. You will almost certainly get a Check Engine Light, but you may also experience other drivability issues.
Common Failure Symptoms:
- Check Engine Light: This is often the first and most common sign. The ECM will store a trouble code like P0340 or P0341.
- Engine Stalling: The engine may stall unexpectedly, either while driving or at idle, which can be a safety risk.
- Hard Starting or No Start: If the ECM doesn't receive a signal from the sensor, it may not be able to time the fuel and spark correctly, making the engine difficult to start or preventing it from starting at all.
- Rough Idle and Misfires: Incorrect timing can lead to a shaky, rough idle and the sensation of the engine misfiring.
- Reduced Engine Power: Your SS may feel sluggish and lack its usual acceleration.
Choosing the Right Aftermarket Sensor
When replacing the camshaft position sensor on your SS, you have a choice between OEM (ACDelco) and various aftermarket brands. For a performance vehicle like the SS with its LS3 engine, sensor quality is important.
Tier 1: OEM & OEM-Equivalent Brands
- ACDelco (OEM): This is the original part your vehicle came with. It guarantees perfect fit and function. The GM part number is 12591720.
- Delphi: Delphi is a well-respected brand and is often the original equipment manufacturer for GM. Their sensors are built to meet or exceed OE standards and are considered a top-tier alternative to ACDelco.
Tier 2: Quality Aftermarket Brands
- NGK/NTK: Known for their ignition components, NTK (the sensor division of NGK) produces reliable sensors that are a solid choice.
- Standard Ignition (SMP): A long-standing brand in the aftermarket that offers quality replacement parts.
- Hitachi: Another brand with a strong reputation for producing quality electronic components for many automakers.
Tier 3: Economy Brands
- Dorman: Dorman offers a cost-effective solution and is widely available. While often a direct fit, some professional technicians and enthusiasts prefer to use OEM or OEM-equivalent brands for critical sensors on performance engines.
- Other brands like Holstein, Walker, and True Tech fall into this category. They offer a budget-friendly price point but may not have the same long-term reliability track record as the higher-tier options.
Pro Tip: For the LS3 engine in your SS, spending a little more on a reputable brand like Delphi or sticking with ACDelco is a wise investment. Given the sensor's low part cost, the assurance of quality and longevity is worth the small price difference.
Known Issues, Recalls, or TSBs
As of this writing, there are no specific recalls or widespread Technical Service Bulletins (TSBs) from GM directly related to the camshaft position sensor for the 2014-2017 Chevrolet SS. Recalls for this vehicle have primarily focused on issues like electric power steering. Failures of this sensor are typically due to normal wear and tear or isolated electronic faults.
Cost Comparison Table
| Part Type | Estimated Cost |
|---|---|
| New OEM (ACDelco) | $45 - $75 |
| New Aftermarket | $27 - $57 |
| Shop Labor | $60 - $120 |
Frequently Asked Questions (FAQ)
Where is the camshaft position sensor located on the 2014-2017 Chevrolet SS?
The camshaft position sensor on the LS3 engine is located on the front of the engine, mounted in the timing chain cover. It is held in by a single 10mm bolt.
Can I replace this sensor myself?
Yes, this is a very DIY-friendly job for most owners. The sensor is easily accessible on the front of the engine. The process involves disconnecting the electrical connector, removing one bolt, and swapping the sensor. The entire job can typically be done in under 30 minutes with basic hand tools.
What happens if I don't replace a failing sensor?
Ignoring a failing camshaft position sensor can lead to more severe problems. Initially, you'll experience poor performance and fuel economy. Eventually, the sensor can fail completely, leaving you stranded as the engine may refuse to start or stall while driving.
Is an ACDelco sensor really better than aftermarket for my SS?
For a critical sensor like this, the original ACDelco part provides the highest assurance of compatibility and reliability. However, an OEM-supplier brand like Delphi is widely considered to be of equal quality and is an excellent choice. While budget brands will work, they may not offer the same durability, which is important for a high-performance vehicle.
Technical Specifications
OEM Part Numbers: 12591720 12686785
Location: Front Timing Cover. Engine: 6.2L LS3 V8. Type: Hall Effect Sensor.
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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.
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