Jeep Patriot Engine Crankshaft Position Sensor: A Comprehensive Guide (2007-2017)
Fix stalling, no-start conditions, and check engine lights by understanding this critical sensor in your Patriot.
- Sudden engine stalling is the most common and dangerous symptom of a failing crankshaft sensor in a Jeep Patriot.
- Do not use cheap aftermarket sensors for this repair. Use OEM Mopar or NTK brand sensors to avoid immediate failure and repeat work.
- Replacement is difficult due to the sensor's location behind a heat shield on the back of the engine.
- A special scan tool is required for the official "Cam/Crank Relearn" procedure after installation.
Is Your Jeep Patriot Stalling or Not Starting?
A failing crankshaft position sensor is a very common reason for engine problems in the 2007-2017 Jeep Patriot. When this sensor starts to go bad, it can leave you stranded. Because it sends a critical signal for engine timing, a complete failure means the engine will not run. Recognizing the symptoms early can save you from a tow truck.
Common Symptoms of a Bad Crankshaft Sensor
- Engine Stalls Unexpectedly: The most reported issue is the engine stalling while driving, often when the vehicle is warm or coming to a stop.
- Crank, No Start: You'll hear the engine turning over (cranking), but it won't fire up and run. 🎬 See how to diagnose a Patriot that cranks but won't start. This can also happen immediately after installing a cheap, poor-quality aftermarket sensor.
- Check Engine Light: The malfunction indicator lamp will likely turn on, storing diagnostic trouble codes such as P0335 (Circuit Malfunction) or P0339 🎬 Watch this guide on fixing the P0335 crankshaft sensor code. (Circuit Intermittent).
- Rough Idle or Misfire: The engine may run poorly, shake, or feel like it's sputtering at a stop.
- Hesitation or Loss of Power: Your Patriot may struggle to accelerate or feel sluggish.
Recall Notice for Some 2016 Models
A safety recall (NHTSA #16V907) was issued for some 2016 Jeep Patriots built between May 9 and July 15, 2016. The issue was a faulty electrical connector for the crankshaft and camshaft sensors, which could cause stalling. The fix was to replace the wiring connector, not necessarily the sensor itself. While this applies to a specific batch of vehicles, it highlights the sensitivity of this system.
Choosing the Right Aftermarket Sensor: Quality Matters
For many parts, aftermarket options are a great way to save money. However, for the Jeep Patriot's crankshaft position sensor, this is one area where quality is critical. Forums and mechanic discussions are filled with stories of cheap aftermarket sensors being dead-on-arrival or failing within weeks, causing the same problems all over again. Investing in a quality part is highly recommended to fix the problem correctly the first time.
Aftermarket Brand Tiers for Jeep Patriot
- Tier 1 (OEM or Equivalent): These are your best choices. Mopar is the official OEM part. NGK (also sold as NTK) is widely considered to be the original manufacturer for Mopar and is the most recommended aftermarket brand.
- Tier 2 (Reputable Aftermarket): Brands like Delphi and Standard Ignition (SMP) can be good options. Delphi is a massive OEM supplier, though they were linked to the 2016 connector recall. For Standard Ignition, their standard line is generally better regarded than their budget "T-Series" line.
- Tier 3 (Economy Brands): This category includes Dorman, Crown Automotive, Walker Products, Holstein, and other private-label store brands. While attractively priced, these sensors have a higher risk of premature failure or being non-functional out of the box for this specific, sensitive application. Using these parts can lead to repeated repairs.
Pro Tip: Many owners and mechanics recommend buying an OEM Mopar or NTK sensor for this job. The higher initial cost often prevents the future headache and expense of diagnosing and replacing a failed budget sensor.
Cost to Replace a Jeep Patriot Crankshaft Position Sensor
The cost can be broken down into the part itself and the labor to install it. The location of the sensor makes it difficult to access, which drives the labor cost.
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Mopar) | $100 - $135 |
| New Aftermarket | $17 - $39 |
| Shop Labor | $110 - $160 |
| Total Professional Replacement (Aftermarket) | $130 - $200 |
| Total Professional Replacement (OEM) | $210 - $295 |
Frequently Asked Questions (FAQ)
Where is the crankshaft position sensor located on a Jeep Patriot?
The sensor is located on the rear of the engine block, near where the engine meets the transmission. It is tucked behind a heat shield. Access is difficult and can be attempted from either the top of the engine bay (by removing the air filter box and PCM) or from underneath the vehicle. On All-Wheel Drive (AWD) models, the transfer case makes access from below even more challenging.
Can I replace this sensor myself?
Yes, it is possible for a DIY mechanic, but it is considered a difficult job due to the tight access. It requires patience and the ability to work in a cramped space with basic hand tools like sockets and extensions. Several online videos show different approaches to the replacement.
🎬 Watch this step-by-step walkthrough for replacing the sensor yourself.Does the new sensor need a "relearn" procedure?
Yes, Chrysler/Jeep specifies a "Cam/Crank Relearn" procedure after replacement. This procedure helps the engine's computer (PCM) adapt to the new sensor's signal for accurate misfire detection. However, this relearn **must be done with a compatible diagnostic scan tool**; there is no manual procedure. While the engine will run without it, skipping this step may cause a persistent check engine light or incorrect diagnostics in the future.
My Patriot still won't start after replacing the sensor. What's wrong?
This is a common complaint when using low-quality aftermarket sensors. The new sensor may be faulty right out of the box. First, double-check your wiring and connection. If those are secure, the most likely cause is the new part. Try installing the old sensor to see if the vehicle starts; if it does, the new part is bad. It is highly recommended to use an OEM Mopar or NTK brand sensor to avoid this issue.
Helpful Videos
Technical Specifications
OEM Part Numbers: 5033316AB 5033307AD 05033307AC 5149230AA
3-pin, hall-effect sensor that reads the crankshaft's rotational speed and position from the back of the engine block.
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.
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