Crankshaft Position Sensor at Advance Auto Parts: What to Know Before You Buy or Replace

The crankshaft position sensor is one of the most important inputs your engine's computer relies on. When it fails, your car may stall, refuse to start, or throw a check engine light. If you're researching a replacement and wondering what Advance Auto Parts carries, how the part works, and what's involved in replacing it — here's what you need to know.

What a Crankshaft Position Sensor Actually Does

The crankshaft position sensor (CKP sensor) monitors the rotational speed and position of the crankshaft. It sends that data to the engine control module (ECM), which uses it to time fuel injection and ignition spark. Without an accurate signal, the ECM can't fire cylinders correctly — or at all.

Most modern sensors use one of two technologies:

• Magnetic reluctance sensors — passive sensors that generate their own voltage signal as the crankshaft rotates
• Hall effect sensors — active sensors that require a power supply and produce a cleaner digital signal

Your vehicle's year, make, and model determines which type it uses, and that affects which replacement part fits.

Common Symptoms of a Failing CKP Sensor

A failing crankshaft sensor doesn't always announce itself the same way across all vehicles. Common signs include:

• Check engine light with codes P0335, P0336, P0337, P0338, or P0339
• Intermittent stalling, especially at idle or low speeds
• Hard starting or no-start condition
• Rough running or misfires under acceleration
• Loss of tachometer reading on some vehicles

These symptoms overlap with other issues — a failing camshaft sensor, ignition problems, or fuel delivery faults can look similar. A proper OBD-II scan and hands-on inspection are what separate a confirmed CKP fault from a misdiagnosis.

What Advance Auto Parts Carries

Advance Auto Parts stocks crankshaft position sensors from multiple brands, typically including Standard Motor Products, Delphi, Bosch, ACDelco, and their own Carquest branded parts (which Advance acquired). The availability of any specific brand or part number depends on:

• Your vehicle's year, make, model, and engine size
• Your local store's inventory
• Whether you're ordering online for in-store pickup or direct shipping

Most CKP sensors are vehicle-specific — there is no universal fit. You'll need your exact engine code or VIN to ensure the right part. Advance Auto's website and in-store lookup tools allow you to filter by vehicle to narrow results.

Part Quality and Brand Tiers 🔧

Not all replacement sensors are built to the same standard. In the aftermarket world, you generally see three tiers:

OEM (original equipment manufacturer) parts come from your dealership and are made to exact factory specifications. Aftermarket parts from established brands like Bosch or Delphi are generally considered close equivalents, but quality control can vary by production run and application. Budget sensors from lesser-known manufacturers have a higher reported failure rate — sometimes failing within months.

Whether the price difference is worth it depends on how long you plan to keep the vehicle, whether you're doing the job yourself or paying for labor twice, and your tolerance for repeat repairs.

DIY vs. Professional Replacement

Crankshaft sensor replacement ranges from a simple 20-minute job to a significant undertaking — depending entirely on where the sensor is located on your specific engine.

Easy access situations:

• Sensor mounted on the side of the block, accessible from above or below
• One bolt, one connector, done

Difficult access situations:

• Sensor located behind the harmonic balancer or flywheel
• Requires lifting the vehicle, removing underbody covers, or disassembling other components
• Some applications require a special alignment tool after installation

Labor costs at a shop vary by region, shop type (dealer vs. independent), and how accessible the sensor is. Total repair costs — parts and labor combined — commonly range from under $100 on straightforward applications to several hundred dollars when access is difficult, though actual costs in your area will differ.

If you're doing it yourself, confirm you have the right tools before starting. Some sensors also require a relearn procedure after installation, where the ECM learns the new sensor's signal pattern. On many vehicles this happens automatically during a normal drive cycle. On others, a scan tool may be required to initiate the relearn.

What Shapes Your Outcome

A few variables determine how this repair actually goes for you:

• Engine location and sensor placement on your specific vehicle
• Whether a relearn procedure is needed and what it requires
• Part brand and quality relative to your budget and driving needs
• Whether the code is definitely CKP-related or part of a broader electrical or engine issue
• Labor rates in your area if you're not doing it yourself

The same P0335 code on a compact sedan and a full-size truck can mean completely different jobs — different parts, different labor times, different total costs. What applies to one vehicle often doesn't transfer directly to another, even within the same brand family.