How to Find and Replace the Crankshaft Position Sensor on a 2012 Kia Sorento

If you're searching for the 2012 Kia Sorento crankshaft position sensor location, you're likely facing starting issues or a check engine light with code P0335. The crankshaft position sensor (CKP) on the 2012 Kia Sorento is typically located at the rear of the engine block, near the transmission bellhousing. For V6 models, it's often found beneath the timing cover, requiring partial disassembly. This guide provides accurate location details, step-by-step replacement instructions, diagnostic tips, and key considerations based on engine type—helping you avoid costly misdiagnoses and unnecessary labor.

Understanding the Crankshaft Position Sensor in the 2012 Kia Sorento

The crankshaft position sensor plays a critical role in engine operation by monitoring the rotational speed and position of the crankshaft. This data is sent to the Engine Control Module (ECM), which uses it to manage ignition timing and fuel injection. Without an accurate signal, the engine may not start, run roughly, or stall unexpectedly.

In the 2012 Kia Sorento, two primary engine options exist: the 2.4L inline-4 and the 3.3L V6. 📍 The CKP sensor location varies significantly between these engines due to differences in design and layout. Misidentifying the correct location can lead to wasted time and effort, especially since some sensors are more accessible than others.

📍 Crankshaft Position Sensor Location by Engine Type

Identifying your engine type is the first crucial step before attempting any repair. You can confirm your engine by checking the VIN, owner’s manual, or under-hood emissions label.

For 2.4L Inline-4 Engine Models

In the 2.4L four-cylinder version of the 2012 Kia Sorento, the crankshaft position sensor is located on the rear side of the engine block, close to where the transmission meets the engine. 🔧 It sits just above the oil pan and behind the exhaust manifold, making it somewhat difficult to access without raising the vehicle.

Access Method: Best reached from underneath the vehicle after safely lifting and securing it on jack stands.
Visual Identification: A small rectangular sensor with a single electrical connector and a 10mm mounting bolt.
Common Part Number: 39180-2S000 (OEM equivalent).

For 3.3L V6 Engine Models

The 3.3L V6 model presents a more complex scenario. ❗ In this configuration, the crankshaft position sensor is located under the front timing cover, which means significant disassembly is required for replacement.

Access Method: Requires removal of the serpentine belt, harmonic balancer, and timing cover.
Labor Intensity: High—often taking 4–6 hours even for experienced mechanics.
Why It’s Hidden: Positioned near the crankshaft reluctor ring inside the timing case for precise signal reading.

This distinction is vital because many online guides and videos mix information across model years and engine types, leading to confusion. Always verify your specific engine before proceeding.

🔧 Common Symptoms of a Failing Crankshaft Position Sensor

Recognizing the signs of a failing CKP sensor helps prevent misdiagnosis. While the most definitive indicator is a stored trouble code (typically P0335), real-world symptoms include:

Engine Won’t Start: The car cranks but doesn’t fire—common when the sensor fails completely.
Stalling During Operation: Sudden shutdowns while driving, especially after warming up.
Rough Idling or Misfiring: Erratic idle behavior due to incorrect timing signals.
Illuminated Check Engine Light: Often accompanied by codes like P0335 (Crankshaft Position Sensor A Circuit Malfunction).
Intermittent Starting Issues: Vehicle starts fine one day, then refuses the next.

It’s important to note that these symptoms overlap with other failures, such as camshaft sensors or ignition modules. ✅ Proper diagnosis using an OBD-II scanner is essential before replacing any parts.

🛠️ Tools and Materials Needed for Replacement

Before beginning the job, gather the necessary tools. Having everything ready prevents delays mid-repair.

Tool/Material	Purpose	Notes
OBD-II Scanner	Diagnose error codes	Confirm P0335 or related codes
Jack and Jack Stands	Lift vehicle safely	Never work under a vehicle supported only by a jack
Socket Set (Metric)	Remove bolts	Includes 10mm socket for sensor bolt
Wrenches	Tighten/loosen fittings	Combination wrenches recommended
Digital Multimeter	Test sensor resistance (if needed)	Compare readings to manufacturer specs
New Crankshaft Position Sensor	Replacement part	Ensure compatibility with engine type
Diesel Part Cleaner or Electrical Contact Cleaner	Clean area around sensor	Prevents debris from entering engine

⚙️ Step-by-Step Replacement Procedure (2.4L Model)

The following procedure applies specifically to the 2.4L engine, where the sensor is externally mounted and relatively accessible.

Safety First: Park on a level surface, engage the parking brake, and disconnect the negative battery terminal. ⚠️ This prevents accidental short circuits.
Lift the Vehicle: Use a floor jack to raise the front end and secure it with jack stands. Ensure stability before crawling underneath.
Locate the Sensor: Crawl under the vehicle and look toward the back of the engine, near the transmission bellhousing. You should see a wiring harness leading into a small sensor body bolted to the engine block.
Disconnect the Electrical Connector: Press the release tab and gently pull the connector free. Avoid pulling on the wires.
Remove the Mounting Bolt: Using a 10mm socket, remove the single bolt holding the sensor in place.
Extract the Sensor: Carefully pull the sensor straight out. Note its orientation for reinstallation.
Inspect the Area: Check for oil leakage or metal debris, which could indicate internal engine problems.
Install the New Sensor: Insert the new sensor fully, reinstall the 10mm bolt, and torque to specification (usually 8–10 Nm).
Reconnect Wiring: Plug the connector back in until it clicks.
Reconnect Battery & Test: Reconnect the negative terminal, turn the key to “on” (without starting), then attempt to start the engine.

After successful startup, clear any stored codes using your OBD-II scanner and take a short test drive to ensure stable performance.

❗ Important Notes for 3.3L V6 Replacement

Replacing the CKP sensor on the 3.3L V6 is significantly more involved. Due to its location under the timing cover:

You must remove the front wheels, splash shield, serpentine belt, crankshaft pulley (harmonic balancer), and timing cover.
Timing alignment marks must be observed and reset properly during reassembly to avoid engine damage.
Consider marking the timing belt/chain position before disassembly.
If the timing components show wear, it’s highly recommended to replace them simultaneously to save labor costs.

Due to complexity, many owners opt for professional service unless they have prior experience with timing system repairs.

🛒 Where to Buy a Replacement Sensor

When sourcing a new crankshaft position sensor, consider both OEM and aftermarket options:

OEM (Original Equipment Manufacturer): Direct from Kia dealerships or authorized parts sites. Offers guaranteed fitment and durability.
Aftermarket Brands: Companies like Denso, Bosch, or Standard Motor Products offer reliable alternatives at lower prices.
Compatibility Check: Always input your VIN when purchasing online to ensure correct fit.

Retailers like AutoZone, Advance Auto Parts, and O'Reilly Auto Parts offer in-store pickup and testing services for returned components. Some also provide free loaner tools, such as pullers for the harmonic balancer.

💰 Cost Breakdown: DIY vs. Professional Repair

Repair costs vary widely depending on engine type and labor requirements.

Component	2.4L DIY	3.3L DIY	Professional (3.3L)
Sensor Cost	$25–$45	$25–$45	$25–$45
Labor Time	1–1.5 hours	4–6 hours	4–6 hours
Labor Rate ($90/hr)	N/A	N/A	$360–$540
Total Estimated Cost	$30–$50	$30–$50	$400–$600

As shown, doing the job yourself on a 2.4L model saves substantial money. However, for the V6, the high labor investment may justify professional help unless you’re equipped and experienced.

🔍 Diagnostic Tips Before Replacement

Don’t assume the CKP sensor is faulty just because of a P0335 code. Other issues can mimic sensor failure:

Wiring Damage: Inspect the harness for fraying, corrosion, or rodent damage.
Connector Issues: Bent pins or moisture in the connector can disrupt the signal.
Reluctor Ring Damage: On V6 models, a cracked or missing tooth on the reluctor ring causes erratic signals.
Power Supply Problems: Use a multimeter to verify reference voltage (typically 5V or 12V) at the connector.

A simple wiggle test of the wiring while monitoring live data can reveal intermittent faults. Also, inspect the air gap between the sensor tip and reluctor ring if visible—too much clearance affects signal strength.

📌 Common Misconceptions and FAQs

Several myths persist about the crankshaft position sensor in the Kia Sorento lineup. Clarifying these helps avoid errors.

Myth: All Sorento Years Have the Same Sensor Location

❌ False. While 2011–2014 models share similar layouts, earlier (2003–2009) and later (2016+) generations differ significantly. Always confirm based on your exact year and engine.

Myth: Replacing the Sensor Always Fixes No-Start Issues

❌ Not necessarily. Other components like the camshaft sensor, crankshaft reluctor ring, or ECM itself can cause identical symptoms. Diagnosis should precede replacement.

Myth: Aftermarket Sensors Are Unreliable

⚠️ Partially true. Low-tier brands may fail prematurely, but reputable aftermarket manufacturers meet or exceed OEM standards. Research reviews and brand reputation before buying.

✅ Final Recommendations

Finding the crankshaft position sensor on a 2012 Kia Sorento requires knowing your engine type first. For the 2.4L, it's accessible from below the vehicle near the transmission. For the 3.3L V6, expect extensive disassembly. Always diagnose thoroughly before replacing, use quality parts, and follow proper safety procedures.

If you lack the tools, space, or confidence—especially with the V6—consulting a trusted mechanic is a wise decision. However, for the 2.4L model, this repair is very manageable for most DIYers and can save over $100 in labor.

❓ Frequently Asked Questions

Where is the crankshaft position sensor on a 2012 Kia Sorento 2.4L?: It is located at the rear of the engine block, near the transmission bellhousing, and is best accessed from underneath the vehicle.
Can I drive with a bad crankshaft position sensor?: No. A failing sensor can cause sudden stalling or prevent the engine from starting, creating safety risks and potential roadside breakdowns.
How do I test a crankshaft position sensor?: Use an OBD-II scanner to check for code P0335, inspect the wiring and connector, and measure resistance with a multimeter. Compare results to specifications in the service manual.
Does the 2012 Kia Sorento have both camshaft and crankshaft sensors?: Yes. The camshaft position sensor is located on the cylinder head, while the crankshaft sensor is near the bottom of the engine, depending on the model.
Is the crankshaft sensor the same as the timing sensor?: While sometimes used interchangeably, "timing sensor" usually refers to either the crankshaft or camshaft position sensor, both of which are essential for proper ignition and fuel timing.