Cadillac CTS Engine Crankshaft Position Sensor: 2003-2013
Understanding why your CTS is stalling or won't start and how to choose the right replacement sensor.
- A failing crankshaft sensor is a primary cause of stalling and no-start issues in the 2003-2013 CTS.
- For maximum reliability, choose an OEM-equivalent brand like ACDelco or Delphi for this critical sensor.
- Symptoms can be similar to other problems; confirm the diagnosis with a scan tool to check for codes like P0335.
- Be aware of a related TSB for V6 engines where the crankshaft reluctor wheel may have moved, causing similar codes.
Is Your Cadillac CTS Stalling or Running Rough?
A failing crankshaft position sensor is a common reason for a Cadillac CTS to suddenly develop serious running issues. Because this sensor provides the master signal for engine timing, even a small glitch can cause major problems. Symptoms often appear without warning and can leave you stranded. They might start as intermittent issues, like stalling when the engine warms up, and become more frequent over time.
Known Issues for 2003-2013 Cadillac CTS
While there are no specific recalls for just the crankshaft position sensor on the 2003-2013 CTS, GM has issued Technical Service Bulletins (TSBs) related to its function. One important TSB (PIP3423 series) for the V6 engines (2.8L, 3.6L) notes that the reluctor wheel, which the sensor reads, can sometimes move on the crankshaft. This causes timing correlation trouble codes like P0016, P0017, P0008, and P0009, which can be mistaken for a bad sensor. 🎬 See how to diagnose timing codes like P0008 and P0017. A mechanic can check for this issue, sometimes by looking through the sensor mounting hole with a borescope, before replacing more expensive parts. Oil leaks from other parts of the engine can also damage the sensor's wiring or connector over time.
Choosing the Right Aftermarket Crankshaft Sensor
When it's time to replace the sensor, you have several options. For a critical part like this, quality matters. Using a low-quality sensor can lead to the same problems returning quickly.
Brand Tiers for Your CTS
- OEM-Equivalent: ACDelco (GM Genuine) and Delphi are the top choices. ACDelco is the original GM parts brand, and Delphi was a long-time GM supplier. For sensors, these two are often considered the same in quality and are the most recommended for reliability.
- Premium Aftermarket: Brands like Bosch, NGK/NTK, and Standard Motor Products (SMP) have a strong reputation for producing reliable sensors that meet or exceed OEM specifications. They are a solid choice if an OEM part isn't available or if you're looking for a high-quality alternative.
- Quality Aftermarket: Brands such as Walker Products and Dorman offer a good balance of price and quality. They are established names in the aftermarket and are generally more reliable than unknown brands.
- Value Brands: Other brands like Facet, Prenco, and store brands (e.g., Duralast) fall into this category. While the price is attractive, their long-term reliability can be inconsistent. They may be a temporary fix, but for a part that can leave you stranded, investing in a higher-tier brand is often worth it.
Cost to Replace a Cadillac CTS Crankshaft Sensor
The cost can vary based on your specific year, engine, and which brand you choose. Labor costs also differ by shop.
| Part Type | Estimated Part Cost |
|---|---|
| New OEM (ACDelco GM Genuine) | $70 - $150 |
| New Aftermarket | $20 - $155 |
| Shop Labor | $106 - $155 |
Frequently Asked Questions
Can I drive my CTS with a bad crankshaft sensor?
It is not recommended. If the sensor is failing, your engine could stall at any time, which is dangerous in traffic. If the sensor has completely failed, the engine will not start at all.
What does a crankshaft sensor relearn procedure mean?
After replacing the sensor, some GM vehicles, including the CTS, may require a "case relearn" or "crankshaft variation relearn." This procedure uses a professional scan tool to calibrate the new sensor with the ECM to account for tiny imperfections in the crankshaft reluctor wheel. This ensures the computer gets the most accurate timing signal. 🎬 Watch a professional technician explain the crank relearn procedure. Not performing a relearn when required can sometimes lead to a persistent check engine light or rough running.
Could my problem be something else?
Yes. Symptoms of a bad crankshaft sensor can overlap with other issues. A bad camshaft position sensor, a faulty ignition control module, a clogged fuel filter, or even a stretched timing chain can cause similar problems like stalling, misfires, or a no-start condition. It's important to get a proper diagnosis, starting with reading the trouble codes from the computer.
Where is the crankshaft sensor located on my CTS?
The location depends on your engine. For many V6 models (like the 3.2L and 3.6L), it is located on the lower rear passenger side of the engine block, often near or above the oil filter or starter. For early 3.2L models, it's near the oil filter. For later 3.6L models, you may need to remove the starter to access it. Always confirm the location for your specific year and engine before beginning work.
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Technical Specifications
OEM Part Numbers: 12566848 12582652 12613030 213-1579 213-354 213-4573 90540743
The crankshaft position sensor for the Cadillac CTS is typically a Hall-effect sensor that generates a digital signal for the ECM. It reads a toothed reluctor wheel on the crankshaft to determine engine speed and position. The sensor is a single-bolt mount with a 3-pin electrical connector. Some models may require a crankshaft variation relearn procedure after installation.
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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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