Saturn Sky VVT Solenoid Guide (2007-2010): Symptoms, Brands, and Replacement
If your Saturn Sky has a rough idle or a check engine light, a faulty VVT solenoid is a likely and common culprit.
- VVT solenoid failure is a very common, well-documented issue on the 2007-2010 Saturn Sky.
- Symptoms almost always include a Check Engine Light with codes P0010, P0011, P0013, or P0014, plus a rough idle and poor performance.
- Replacement is very easy for a DIYer, requiring only basic tools and about 30 minutes.
- Dirty oil is the number one killer of these parts; always perform an oil change with or before replacing them.
Is Your Saturn Sky Running Rough? It Could Be the VVT Solenoids
A check engine light, poor performance, or a rough idle on a 2007-2010 Saturn Sky often points to a problem with the Engine Variable Valve Timing (VVT) solenoids. This is one of the most common issues for the Ecotec engines in these cars, but the good news is that it's a straightforward and affordable repair you can often do yourself.
Symptoms of VVT Solenoid Failure
When a VVT solenoid fails, it can no longer properly regulate oil flow, leading to incorrect camshaft timing. This can cause a range of noticeable problems:
- Check Engine Light: This is the most common symptom. The computer will detect a problem with the camshaft position and trigger codes like P0010, P0011, P0013, or P0014.
- Rough Idle: The engine may shake or run unevenly when stopped at a light.
- Poor Engine Performance: You might notice sluggish acceleration, hesitation, or a general lack of power.
- Reduced Fuel Economy: Because the engine isn't running efficiently, you may find yourself filling up the gas tank more often.
- Engine Noise: In some cases, a failing solenoid can cause a rattling or ticking noise from the engine.
Choosing the Right Aftermarket VVT Solenoid
You don't have to buy the most expensive part, but you should be careful with the cheapest options. For electronic parts like VVT solenoids, quality and reliability are key to avoiding having to do the job twice.
Here’s a breakdown of your options:
- Tier 1: OEM/Premium Aftermarket (ACDelco, INA, Standard Ignition 'Blue Streak'): ACDelco is the original equipment (OE) manufacturer for GM and is the benchmark for fit and performance. Brands like INA and the premium lines from Standard Ignition are also known for high-quality engineering and are often trusted by professional mechanics.
- Tier 2: Reputable Aftermarket (Dorman, Gates, Cloyes, Holstein, Walker Products): These brands offer a good balance of quality and value. Dorman is a very common replacement and is engineered to match the original part's function. Gates and Cloyes are well-respected names in engine timing components. These are solid choices for a DIY repair.
- Tier 3: Value Brands (URO Parts, True Tech, etc.): While these parts are the most affordable, they can be a gamble. Some owners have reported that very cheap electronic parts from online marketplaces can fail quickly or be dead on arrival, sometimes causing the same error codes to return. If your budget is tight, they are an option, but be prepared for the possibility of a repeat repair.
Cost of Replacing Saturn Sky VVT Solenoids
| Part Type | Estimated Cost (Per Solenoid) |
|---|---|
| New OEM (ACDelco) | $60 - $95 |
| New Aftermarket | $27.55 - $91.01 |
| Shop Labor | $50 - $100 |
Note: Labor costs can vary by location and shop. This is a very quick repair (often under 30 minutes), but many shops have a minimum one-hour labor charge.
Frequently Asked Questions
Can I just clean my old VVT solenoids?
Sometimes, cleaning the screens on the solenoids can temporarily solve the problem if they are just clogged. However, the failure is often internal to the solenoid's electronics or mechanics. Given the low cost of a new part and the ease of replacement, installing a new solenoid is the most reliable long-term fix.
Is this a difficult DIY job?
No, this is a great job for beginners. The solenoids are on top of the engine and easy to access. The process involves removing the plastic engine cover, unplugging the electrical connector, and removing a single 10mm bolt for each solenoid. The old solenoid then pulls straight out.
Do I need to do an oil change when I replace the solenoids?
It is highly recommended. Since dirty oil is the leading cause of solenoid failure, starting fresh with a new filter and the correct grade of oil will help protect your new parts and the rest of your engine.
What happens if I don't replace a bad VVT solenoid?
You will continue to have a check engine light on and experience poor engine performance and fuel economy. While it won't typically cause immediate, catastrophic engine damage, the constant strain from improper timing and rough running isn't good for the engine long-term. It can also make the car difficult or unpleasant to drive.
Helpful Videos
Technical Specifications
OEM Part Numbers: 12679099 (Intake) 12655420 (Intake, superseded) 12628347 (Intake, superseded) 12679100 (Exhaust) 12655421 (Exhaust, superseded) 12628348 (Exhaust, superseded)
The Saturn Sky uses two VVT solenoids, one for the intake cam and one for the exhaust cam. Both solenoids are physically identical and interchangeable on many aftermarket kits, but OEM parts have distinct part numbers. They are located on the top of the valve cover for easy access and are each held in by a single 10mm bolt.
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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.
- Saturn Sky: