A Guide to the Engine Camshaft Position Sensor for 1986-1995 Buick Century
Solve stalling, rough running, and no-start problems by understanding this critical engine sensor.
- Confirm your engine is a 3.1L or 3.8L V6, as not all Century engines from this era use a cam sensor.
- Symptoms include no-start, stalling, and rough running.
- For reliability, choose premium brands like ACDelco or Delphi over budget options.
- Always inspect the wiring and connector for damage before replacing the sensor itself.
Is Your Buick Century Stalling or Refusing to Start?
If your 1986-1995 Buick Century suddenly stalls, runs rough, or cranks but won't start, a failing camshaft position sensor could be the culprit. This sensor is a common failure point that can cause a lot of headaches, but understanding how it works and how to choose the right replacement can get you back on the road without overspending.
Symptoms of a Failing Camshaft Position Sensor
A bad cam sensor can make your car's computer guess when to fire the spark plugs and injectors, leading to noticeable problems. The symptoms often get worse as the engine warms up. You might experience:
🎬 Watch: 11 symptoms of a bad camshaft sensor and how to test them.- Engine Cranks but Won't Start: The computer has no signal and won't start the engine to prevent damage.
- Sudden Stalling: The engine may die while you're driving or idling at a stoplight, often without warning.
- Rough Idle and Poor Acceleration: The engine may shake, hesitate, or feel sluggish because the timing is incorrect.
- Check Engine Light: On later models (1994-1995), a failing sensor will likely trigger a Check Engine Light with codes like P0340 or P0341. Earlier models may show an OBD-I Code 41.
Choosing the Right Aftermarket Sensor: Brand Quality Tiers
When it comes to critical electronic sensors, quality matters. A cheap, poorly made sensor can fail quickly, leaving you with the same problem. Here’s a breakdown of the available brands, from best to worst.
- Premium Aftermarket (OEM Equivalent): Brands like ACDelco and Delphi are original equipment manufacturers for General Motors. Choosing one of these is the closest you can get to the original part's quality and is highly recommended for reliability.
- Quality Aftermarket: Brands like Standard Motor Products (SMP) and Walker Products have a solid reputation. In some cases, SMP is the actual manufacturer for the ACDelco part, meaning you get the same quality in a different box. These are a dependable choice if a premium brand isn't available.
- Value Brands: This category includes Dorman, True Tech, Global Parts, Motorad, and Spectra. While the price is attractive, their track record on electronic sensors is mixed. These are best considered a budget option, but be aware that they may not have the same longevity as premium brands. For a critical part that can leave you stranded, it's often worth spending more for a better brand.
Pro Tip: Check the Wiring First!
Before you replace the sensor, inspect the wiring harness and connector. A loose connection or frayed, oil-soaked wire can cause the exact same symptoms as a bad sensor. Many owners have replaced a sensor only to find the real problem was a simple wiring issue.
| Part Category | Estimated Cost |
|---|---|
| New Aftermarket Part | $16.51 - $80.59 |
| Estimated Shop Labor | $100 - $250 |
| Total Professional Replacement | $120 - $330+ |
Labor costs vary significantly based on your engine. On the 3.1L V6, the sensor is located behind the power steering pump, which adds labor time.
Frequently Asked Questions
Where is the camshaft position sensor located on my Century?
Location depends on your engine. On the popular 3.1L V6, it is located on the front of the engine block, behind the power steering pump. You will need to unbolt the power steering pump and move it aside to access the sensor. On 3.8L V6 engines, it is typically found on the timing cover, near the harmonic balancer.
🎬 See how to replace the sensor on a 3.8L V6 engine.Can I replace this sensor myself?
For a DIYer with basic tools, yes, this is often a manageable job. On the 3.1L V6, the main challenge is moving the power steering pump out of the way. 🎬 Watch this easy walkthrough for replacing the sensor on a 3.1L engine. The job involves removing a single bolt holding the sensor in place. Just be sure to clean the area around the old sensor before removing it to prevent dirt from falling into the engine.
Are there any recalls for this part?
No. A search of the National Highway Traffic Safety Administration (NHTSA) database shows no recalls for the camshaft position sensor on the 1986-1995 Buick Century.
What happens if I ignore a failing camshaft sensor?
At first, you may only notice minor issues like a rough idle or poor gas mileage. However, the sensor will eventually fail completely. When it does, your engine will either stall while you are driving or it will not start at all, potentially leaving you stranded.
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Technical Specifications
OEM Part Numbers: 10456145 10456146 213-144
This sensor is a Hall-effect sensor that reads the position of the camshaft. It typically has a 3-pin electrical connector. The part is engine-specific, primarily for the 3.1L and 3.8L V6 engines used in the 1986-1995 Buick Century.
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.
- Buick Century: