Acura TSX Engine Crankshaft Position Sensor Guide (2004-2014)
Understand why your TSX is stalling or won't start and how to choose the right replacement crankshaft position sensor.
- A failing crankshaft sensor can cause a no-start condition, leaving you stranded.
- Common symptoms include a Check Engine Light (P0335, P0336), stalling, and rough running.
- For best results, choose an OEM-equivalent brand like Denso or Hitachi for your replacement.
- Check for and repair any oil leaks near the sensor, as leaking oil is a common cause of failure.
Is Your Acura TSX Stalling or Not Starting? It Could Be the Crankshaft Sensor.
If your 2004-2014 Acura TSX suddenly has trouble starting, stalls unexpectedly, or the engine runs rough, a failing crankshaft position sensor is a likely culprit. This sensor is vital for engine operation, and when it fails, it can leave you stranded. This guide will help you understand the symptoms, choose the best aftermarket replacement, and know what to expect for repair costs.
Don't Ignore the Signs
A completely failed crankshaft position sensor will prevent the engine from starting. Early symptoms like intermittent stalling or a check engine light should be addressed quickly to avoid being stranded.
Symptoms of a Failing Crankshaft Position Sensor
A bad crank sensor on a TSX will usually give you a few warning signs before it fails completely. Look out for these common issues:
- Check Engine Light: This is often the first sign. The most common trouble codes are P0335 (Crankshaft Position Sensor 'A' Circuit Malfunction) and P0336 (Crankshaft Position Sensor 'A' Circuit Range/Performance).
- Engine Won't Start: The engine will crank but won't fire up because the computer doesn't know when to send spark and fuel.
- Stalling: The engine may stall unexpectedly while driving, especially when it's warm or at idle.
- Rough Idle and Misfires: The engine may shake or run poorly because the timing is off.
- Poor Acceleration: You might notice the car feels sluggish or hesitant when you press the gas.
Choosing the Right Aftermarket Sensor for Your TSX
When it comes to sensors, quality matters. For the Acura TSX, using a low-quality part can lead to the same problems coming back quickly. However, you don't have to buy the expensive OEM part from an Acura dealer to get reliable performance.
Brand Quality Tiers
Here’s a breakdown of the brands available, from best to budget:
- OEM Equivalent (Best Quality): Denso and Hitachi are often the original equipment manufacturers for Honda/Acura. Choosing one of these brands usually means you are getting the same quality as the dealer part, but at a lower price. NGK (under the NTK brand) is also a top-tier sensor manufacturer known for its reliability.
- Trusted Aftermarket Brands: Brands like Delphi, Standard Ignition (SMP), and Beck Arnley are well-regarded in the industry. They provide a good balance of quality and price and are a solid choice for most repairs.
- Budget-Friendly Options: Brands like Dorman, Walker Products, and others offer the lowest prices. While they can work, some owner experiences suggest they may not have the same longevity or precise fit as higher-tier options. It's often better to spend a little more on a sensor to avoid doing the job twice.
Pro Tip: Check for Oil Leaks
The crankshaft position sensor is located on the lower part of the engine. Oil leaks from other parts of the engine can drip onto the sensor and its wiring, causing it to fail prematurely. When replacing the sensor, inspect the area for oil and fix any leaks to protect your new part.
Cost to Replace the Acura TSX Crankshaft Position Sensor
The cost depends on whether you do the work yourself or take it to a shop. The part itself is not very expensive.
| Item | Cost Range |
|---|---|
| New Aftermarket Sensor | $24 - $86 |
| New OEM Sensor | $140 - $220 |
| Shop Labor | $48 - $140 |
| Total Professional Replacement | $203 - $288 |
Frequently Asked Questions (FAQ)
Where is the crankshaft position sensor located on my Acura TSX?
On both the first-gen (2004-2008) and second-gen (2009-2014) Acura TSX with the 2.4L 4-cylinder engine, the sensor is on the engine block, near the crankshaft pulley and oil filter. It's mounted to the engine block, sometimes behind a small metal cover. On the V6 models (2010-2014), it's located between the engine and transmission.
🎬 See the specific sensor location for TSX V6 models.Is replacing the crankshaft sensor a DIY job?
Yes, for many DIY mechanics, this is a manageable job. 🎬 Watch this step-by-step guide to replacing the sensor yourself. It typically involves raising the front of the vehicle, removing a splash shield, and possibly a small cover plate. The sensor is held in by a single 10mm bolt. The main challenge is accessing it, as it can be in a tight spot. The job takes about 30-60 minutes.
Do I need to do a "relearn" procedure after replacing the sensor?
For the Acura TSX, a specific "CKP pattern learn procedure" is recommended after replacement to ensure the computer reads the new sensor correctly. While the car may run without it, performing the relearn with a capable scan tool is best practice to prevent future issues. 🎬 Watch how to perform the CKP relearn with a scan tool. Some forum users report that simply driving the car allows the system to adapt over time.
Are there any recalls for the crankshaft position sensor on the 2004-2014 TSX?
No, there are no specific recalls issued by the NHTSA for the crankshaft position sensor on the 2004-2014 Acura TSX. There are recalls for other issues like power steering hoses and electrical systems, but not the crank sensor itself.
Helpful Videos
Technical Specifications
OEM Part Numbers: 37500-RAA-A01 37500-PNC-006 37500-R40-A01
The sensor is a magnetic or Hall-effect type sensor that reads teeth on a reluctor wheel attached to the crankshaft. It is typically secured with a single 10mm bolt and has a 3-pin electrical connector.
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.
- Acura TSX:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Acura TSX Stalling or Not Starting? It Could Be the Crankshaft Sensor.
- Don't Ignore the Signs
- Symptoms of a Failing Crankshaft Position Sensor
- Choosing the Right Aftermarket Sensor for Your TSX
- Brand Quality Tiers
- Pro Tip: Check for Oil Leaks
- Cost to Replace the Acura TSX Crankshaft Position Sensor
- Frequently Asked Questions (FAQ)
- 🎟️ Get 5% Off