Ford Explorer Sport Trac 2001-2010 Engine Crankshaft Position Sensor Guide
Diagnose and choose the right crankshaft position sensor for your 4.0L or 4.6L Sport Trac.
- On the 4.0L V6, always inspect the harmonic balancer for failure, as it can destroy the new sensor if not also replaced.
- A no-start condition where the engine cranks is the most common symptom of a completely failed sensor.
- The 4.0L V6 and 4.6L V8 engines use different crankshaft sensors; ensure you order the correct part for your engine.
- Using a high-quality OEM or premium aftermarket brand like Motorcraft, Delphi, or Denso is strongly recommended for reliability.
Is Your Sport Trac Cranking But Not Starting?
A common reason a 2001-2010 Ford Explorer Sport Trac won't start is a failed crankshaft position sensor (CKP). This sensor is essential for engine operation. When it fails, the engine's computer loses track of the crankshaft's position, leading to a no-start condition, stalling, or poor performance. This guide will help you understand the symptoms, choose the right replacement part, and know what to expect from the repair.
Check the Harmonic Balancer First! (4.0L V6)
Before you buy a new sensor, inspect the main crankshaft pulley at the front of the engine. This part, called the harmonic balancer, is known to fail on the 4.0L SOHC engine. The outer metal ring can separate from the inner hub and slide backward, physically hitting and destroying the crankshaft sensor. Symptoms include a squealing or wobbling serpentine belt and visible damage to the pulley. If the balancer has failed, it must be replaced along with the sensor.
🎬 Watch this complete walkthrough of the sensor and balancer replacement.Symptoms of a Failing Crankshaft Sensor
- Engine Cranks, But Won't Start: This is the most common and definitive symptom. The starter will turn the engine over, but it will never fire up.
- Sudden Stalling: The engine may shut off unexpectedly while driving or when coming to a stop.
- Rough Idle and Misfires: The engine may shake, vibrate, or run unevenly because the computer can't time the spark and fuel correctly.
- Poor Acceleration: You may notice a lack of power, hesitation, or jerky acceleration.
- Check Engine Light: A failing sensor will almost always trigger the check engine light with code P0335.
Choosing the Right Aftermarket Sensor
When it comes to electronic sensors, quality matters. A cheap, poorly made sensor can fail quickly or provide inaccurate readings, causing performance issues. Here is a breakdown of available brands to help you choose.
Brand Quality Tiers
- Tier 1 - Premium & OEM: Motorcraft, Delphi, Denso, NGK/NTK. Motorcraft is the original Ford part and offers a guaranteed fit and function. Delphi and Denso are often the original equipment manufacturers for Ford and other brands, providing the same level of quality. For a critical sensor like this, these brands are the most reliable choice.
- Tier 2 - Quality Aftermarket: Standard Ignition (SMP), Hitachi, Holstein, Walker Products. These are established aftermarket brands that offer a good balance of quality and price. They are a solid choice, but quality can sometimes be less consistent than the premium brands.
- Tier 3 - Economy & Store Brands: Dorman, Prenco, True Tech, Global Parts. These brands offer the lowest price. While Dorman is a popular brand with some positive reviews, many professional mechanics and forum users report higher failure rates with economy sensors. These are best used for a temporary fix or if budget is the primary concern.
Engine-Specific Parts
The 4.0L V6 engine used from 2001-2010 uses one specific crankshaft sensor. The optional 4.6L V8 engine (2007-2010) uses a different sensor. Always verify the part fits your specific engine before ordering.
Replacement Cost
Replacing the crankshaft position sensor is a relatively affordable repair. The biggest cost variable is whether you do it yourself or hire a mechanic. The costs below do not include replacing a failed harmonic balancer.
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Motorcraft) | $30 - $55 |
| New Aftermarket | $21 - $49 |
| Shop Labor | $55 - $80 |
| Total Professional Replacement | $85 - $135 |
Frequently Asked Questions
Where is the crankshaft position sensor located on the Sport Trac?
On the 4.0L V6 engine, the sensor is located on the front of the engine, on the passenger side, right behind the main crankshaft pulley (harmonic balancer). It is held in place by two 8mm bolts.
Can I replace this sensor myself?
Yes, this is a DIY-friendly job for most people with basic tools. The sensor itself is easy to access from underneath the truck and is held by two small bolts. 🎬 Watch: Step-by-step guide to replacing the sensor yourself. However, if the harmonic balancer has also failed, that replacement is a much more difficult job that may require special puller tools.
Were there any recalls for this part?
No. There have been no recalls issued by the NHTSA for the crankshaft position sensor on the 2001-2010 Ford Explorer Sport Trac.
What is the main trouble code for a bad crank sensor?
The most common diagnostic trouble code (DTC) is P0335 - Crankshaft Position Sensor 'A' Circuit Malfunction. This code indicates that the engine's computer has lost the signal from the sensor.
Helpful Videos
Technical Specifications
OEM Part Numbers: 5L2Z-6C315-A 1W7Z-6C315-AB 1L2Z-6C315-BB
The sensor for the 4.0L SOHC V6 is a magnetic reluctance type that reads a 36-1 tooth reluctor wheel on the harmonic balancer to determine crankshaft position and speed.
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.
- Ford Explorer Sport Trac:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Sport Trac Cranking But Not Starting?
- Check the Harmonic Balancer First! (4.0L V6)
- Symptoms of a Failing Crankshaft Sensor
- Choosing the Right Aftermarket Sensor
- Brand Quality Tiers
- Engine-Specific Parts
- Replacement Cost
- Frequently Asked Questions
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