Advance Auto Parts Camshaft Position Sensor: What to Know Before You Buy or Replace
The camshaft position sensor is a small but critical component that helps your engine run smoothly. If you're searching for one at Advance Auto Parts — or trying to decide whether to replace it yourself — understanding what the sensor does, what affects your options, and how the replacement process works will help you make a more informed decision.
What Does a Camshaft Position Sensor Do?
The camshaft position sensor (CMP sensor) monitors the rotational position of the camshaft and sends that data to the engine control module (ECM). The ECM uses this information to precisely time fuel injection and ignition spark relative to where each piston is in its cycle.
Without an accurate signal from the CMP sensor, the engine management system can't synchronize properly. Most modern engines have one or more camshaft position sensors, depending on whether the engine uses a single overhead cam (SOHC), dual overhead cam (DOHC), or variable valve timing (VVT) system.
Common Signs of a Failing Camshaft Position Sensor
A failing CMP sensor usually triggers a check engine light, often with a diagnostic trouble code (DTC) in the P0340–P0349 range. Other symptoms can include:
- Hard starting or no-start conditions
- Rough idle or engine stalling
- Hesitation or stumbling during acceleration
- Reduced fuel economy
- Transmission shifting issues on some vehicles, where the ECM uses CMP data for shift logic
These symptoms overlap with several other sensor and ignition system faults, which is why reading the fault codes with an OBD-II scanner is important before purchasing a replacement part.
What Advance Auto Parts Offers
Advance Auto Parts typically stocks camshaft position sensors under multiple brands and price tiers — including economy, mid-range, and premium options. What's available for your vehicle depends on:
- Year, make, model, and engine size — a 2.0L four-cylinder and a 3.5L V6 in the same vehicle model may use entirely different sensors
- Your location — inventory varies by store and region
- Online vs. in-store availability — the website often shows more options than what a local store keeps on the shelf
Many locations offer same-day pickup if the part is in stock, or ship-to-home for sensors not stocked locally. Advance also frequently runs promotions, and members of their Speed Perks loyalty program may have access to additional discounts.
OEM vs. Aftermarket: What the Difference Means Here 🔧
| Factor | OEM Sensor | Aftermarket Sensor |
|---|---|---|
| Source | Made by or for the vehicle manufacturer | Made by third-party suppliers |
| Fit | Exact match to original specs | Usually direct-fit, varies by brand quality |
| Price | Typically higher | Ranges from budget to near-OEM quality |
| Availability | Dealer parts departments | Auto parts stores, online retailers |
| Warranty | Varies by manufacturer | Varies by brand (often 1–2 years) |
For a camshaft position sensor, aftermarket parts from reputable suppliers generally perform well on high-volume vehicles. On engines with variable valve timing (VVT) systems — like Honda's i-VTEC, Toyota's VVT-i, or GM's VVS — sensor precision matters more, and some mechanics recommend sticking closer to OEM specs on those applications.
Variables That Shape Your Replacement Experience
No two CMP sensor jobs are identical. What affects the difficulty and cost of your situation:
Engine layout — On some engines, the CMP sensor is accessible in minutes. On others, it's buried behind intake manifolds, timing covers, or other components. A quick visual inspection or a look at a repair manual for your specific engine will tell you a lot.
Number of sensors — A DOHC V6 or V8 may have two, three, or four camshaft position sensors. Replacing just one may resolve the fault code, but if the engine has high mileage, some mechanics replace them in sets.
Vehicle age and corrosion — On older vehicles, the sensor's mounting bolt or electrical connector may be corroded, making removal more involved than it would be on a newer car.
VVT system involvement — If your vehicle has variable valve timing and the CMP sensor reading is off, there may be additional diagnostic steps before confirming the sensor is actually the root cause.
DIY Feasibility
Many camshaft position sensor replacements are accessible to a mechanically comfortable DIYer. The basic steps typically involve:
- Disconnecting the battery (negative terminal first)
- Locating the sensor (varies widely by engine)
- Unplugging the electrical connector
- Removing the mounting bolt and pulling the sensor
- Installing the new sensor and torquing the bolt to spec
- Clearing the fault codes after reinstallation
That said, accessing the sensor on some engines requires removing other components first. Before committing to DIY, look up a walk-through for your specific engine — not just the vehicle model. The same platform can have multiple engine options with very different layouts.
Part Costs and What Affects Them
Camshaft position sensor prices at Advance Auto Parts generally range from around $15 to $80 or more, depending on the brand tier and your specific vehicle. Labor costs at a shop, if you go that route, vary significantly by region and shop type — independent shops typically charge less per hour than dealerships. ⚠️
The total job cost depends on how long the sensor takes to access and replace, which the part price alone doesn't reflect.
The Piece Only You Can Fill In
The right sensor, the right brand tier, and whether DIY makes sense depend entirely on your specific engine configuration, your mechanical comfort level, your vehicle's history, and what your diagnostic codes actually point to. Knowing how the sensor works and what's available gets you most of the way there — but your engine bay is the final variable.