Cadillac CTS Engine Crankshaft Position Sensor Guide (2014-2019)
Understanding the signs of a failing crankshaft position sensor in your 2014-2019 Cadillac CTS and how to choose a reliable replacement.
- Symptoms like stalling, no-start, and a rough idle are strong indicators of a failing crankshaft sensor.
- Diagnostic trouble codes P0335 and P0336 are the most common codes associated with this failure.
- For a critical electronic part, choosing an OE-equivalent brand like ACDelco, Delphi, or NGK/NTK is highly recommended for reliability.
- While there are no direct recalls, a TSB for earlier models suggests that related timing codes could point to a more complex issue than just the sensor.
Is Your CTS Stalling or Running Rough? It Could Be the Crankshaft Sensor.
If you're experiencing issues like your engine cranking but not starting, sudden stalling, or a rough idle, a faulty crankshaft position sensor could be the culprit. This sensor is vital for engine operation, and when it begins to fail, it can cause a range of noticeable problems. Ignoring these symptoms can lead to decreased fuel economy, poor performance, and eventually leave you stranded.
Symptoms of a Failing Crankshaft Position Sensor in a 2014-2019 Cadillac CTS
A bad crankshaft sensor can manifest in several ways. You might notice one or more of the following issues:
- Check Engine Light: This is often the first indicator. A scan tool will likely show codes such as P0335 or P0336. 🎬 Watch: Understanding P0335 symptoms and how to fix it.
- Engine Won't Start: The engine may crank but fail to start because the ECM isn't receiving the signal it needs to initiate spark and fuel.
- Stalling: The engine may stall unexpectedly while driving, which can be dangerous. This can happen intermittently, especially as the engine warms up.
- Rough Idle and Misfires: Your CTS may idle poorly or vibrate excessively due to incorrect timing, leading to engine misfires.
- Poor Acceleration: You may experience sluggish or jerky acceleration as the ECM struggles with inconsistent sensor data.
- Reduced Fuel Economy: Inefficient engine timing and fuel injection caused by a bad sensor can lead to your car burning more gas than usual.
Known Issues and Technical Service Bulletins (TSBs)
For some 2004-2014 Cadillac CTS models with the 3.6L engine, GM issued a Technical Service Bulletin (PIP3423P) related to the crankshaft reluctor wheel. This wheel, which the sensor reads, could move from its original position, causing timing-related DTCs like P0016, P0017, and others, which can mimic a bad sensor. While this specific TSB applies up to the 2014 model year, it highlights the importance of proper diagnosis. If you have multiple timing codes along with a crank sensor code, the issue could be internal to the engine rather than just the sensor itself.
Choosing the Right Aftermarket Crankshaft Sensor
When it comes to critical electronic parts like the crankshaft position sensor, quality and accuracy are paramount. While many brands are available, they generally fall into a few tiers.
Pro Tip: For a vital sensor like this, choosing a brand with a reputation as an Original Equipment (OE) supplier is the safest bet for reliability and performance.
Tier 1: OEM & OE-Equivalent Brands
These brands are either the original supplier to GM or are known for producing parts that meet or exceed OEM specifications. They are the most recommended choice.
- ACDelco: As GM's in-house parts brand, ACDelco offers both "GM Genuine Parts" (the exact original part) and high-quality aftermarket lines like ACDelco Gold. This is often the most reliable option.
- Delphi: A major OE supplier for many GM components, Delphi sensors are widely considered a top-tier choice that provides factory-level performance and reliability.
- NGK/NTK: While famous for spark plugs, NGK's sensor division (NTK) is also an OEM supplier for many manufacturers and is highly regarded for its quality and precision.
Tier 2: Reputable Aftermarket Brands
These brands are well-established in the aftermarket and offer a good balance of quality and value. They are generally a solid choice if an OE-equivalent part isn't available or is outside your budget.
- Standard Motor Products (SMP): A long-standing company that manufactures a wide range of engine management parts. They are often considered a reliable aftermarket option.
- Hitachi: Known for producing quality electronic components for many Japanese and domestic vehicles.
- Walker Products: A US-based company specializing in fuel and engine management components.
Tier 3: Economy Brands
This category includes lesser-known or store-brand parts. While the price is attractive, the quality, accuracy, and longevity can be inconsistent. For a part as critical as the crankshaft position sensor, using an economy brand can be a gamble that may lead to continued performance issues or premature failure.
Cost of Replacing a Crankshaft Position Sensor
The total cost will depend on the brand of the part and whether you perform the replacement yourself or have it done by a professional mechanic.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $22 - $87 |
| New OEM Part | $71 - $147 |
| Shop Labor | $106 - $155 |
| Total Professional Replacement | $176 - $302 |
Frequently Asked Questions (FAQ)
Where is the crankshaft position sensor located on the 2014-2019 Cadillac CTS?
The location varies slightly by engine. On many GM engines, including those in the CTS, the sensor is located on the lower side of the engine block, near the transmission bell housing or by the main crankshaft pulley. It reads a toothed reluctor wheel on the crankshaft to determine its position. You may need to lift the vehicle to gain access.
Can I drive my CTS with a bad crankshaft position sensor?
It is not recommended. While the car may still run intermittently, a failing sensor can cause the engine to stall at any time, creating a serious safety risk. If the sensor fails completely, the engine will not start at all.
Is replacing the crankshaft position sensor a DIY job?
For a moderately experienced DIYer, this is often a feasible job. It typically involves disconnecting the battery, locating the sensor, removing a single bolt, and disconnecting the electrical connector. However, access can be tight depending on the engine (2.0T vs 3.6L V6), and you may need to raise the vehicle securely. The difficulty is generally low, taking about 1 to 1.5 hours.
🎬 See this step-by-step walkthrough for replacing the sensor.Are there any recalls for this part on my Cadillac CTS?
As of late 2023, there are no specific NHTSA recalls for the crankshaft position sensor itself on the 2014-2019 Cadillac CTS. However, it's always a good practice to check for any new recalls using your vehicle's VIN on the NHTSA website.
What's the difference between a P0335 and P0336 code?
Both codes point to a problem with the crankshaft position sensor. Code P0335 ("Circuit A Malfunction") typically means the ECM is receiving no signal from the sensor. Code P0336 ("Circuit Range/Performance") means the signal is present but is erratic, intermittent, or incorrect compared to the camshaft position sensor signal. This can be caused by a failing sensor, wiring issues, or a problem with the reluctor ring.
🎬 Watch this before you decide to replace the sensor.Helpful Videos
Technical Specifications
OEM Part Numbers: 12674702 12627185 12632872
This is a 3-pin Hall Effect sensor that reads the crankshaft reluctor wheel to provide engine speed and position data to the ECM. It is typically mounted on the engine block.
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.
- Cadillac CTS:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your CTS Stalling or Running Rough? It Could Be the Crankshaft Sensor.
- Symptoms of a Failing Crankshaft Position Sensor in a 2014-2019 Cadillac CTS
- Known Issues and Technical Service Bulletins (TSBs)
- Choosing the Right Aftermarket Crankshaft Sensor
- Tier 1: OEM & OE-Equivalent Brands
- Tier 2: Reputable Aftermarket Brands
- Tier 3: Economy Brands
- Cost of Replacing a Crankshaft Position Sensor
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off