Ram ProMaster 2500 Engine Oil Pressure Switch: A Complete Guide for 2014-2021 Models
Dealing with a P0520 code or a flickering oil light? Here’s what you need to know about your ProMaster's oil pressure switch.
- The most common sign of failure is the P0520 check engine light code.
- Replacement is a difficult, labor-intensive job because the sensor is located under the intake manifolds.
- Due to the high labor cost, using a quality OEM (Mopar) or premium aftermarket part is highly recommended to avoid repeat repairs.
- A TSB was issued for 2014 models, indicating this is a known factory issue that was later corrected with a revised part.
Is Your Ram ProMaster 2500 Oil Pressure Switch Failing?
A bad oil pressure switch is a very common problem on the 3.6L Pentastar engine used in the 2014-2021 Ram ProMaster. When this sensor fails, it can cause a lot of confusion, making you wonder if your engine is in serious trouble. Usually, it's just a faulty sensor, but ignoring the warnings is a risk.
Top 3 Symptoms of a Bad Switch
- Check Engine Light: The most common sign is a check engine light with the diagnostic trouble code (DTC) P0520 (Engine Oil Pressure Sensor/Switch Circuit) stored in the computer.
- Oil Warning Light: The red oil pressure light on your dashboard may light up or flicker, even if your oil level is full.
- Erratic Gauge Reading: If your van has an oil pressure gauge, it might read zero, max out, or jump around unpredictably.
A Note on Serious Symptoms
If the warning light is on AND you hear ticking, knocking, or clacking noises from the engine, pull over immediately. This could mean you have actual low oil pressure, which can destroy your engine quickly. Do not continue driving.
Known Issues: TSB for 2014 ProMaster
For early models, there is a specific Technical Service Bulletin (TSB #18-034-14) that addresses the P0520 code. This TSB applies to ProMaster vans built on or before March 12, 2014. The official fix is to replace the original oil pressure sensor with a revised, more reliable part. Even for later models, failure of this sensor is a well-known issue.
Choosing the Right Aftermarket Oil Pressure Switch
Because replacing this sensor is a labor-intensive job, choosing a quality part is critical to avoid doing the work twice. The biggest cost isn't the part; it's the time it takes to install it.
- OEM (Mopar): Mopar is the original equipment manufacturer. Many owners and mechanics prefer to stick with the OEM part to ensure compatibility, and it comes with a factory warranty. While generally reliable, even OEM sensors can fail.
- Premium Aftermarket (Standard Ignition, Walker Products): Brands like Standard Ignition (SMP) and Walker Products have a solid reputation. They design their parts to meet or exceed OEM specifications and are often a reliable, cost-effective alternative to the dealer part.
- Budget Aftermarket (Crown Automotive, Holstein): These brands offer a more affordable price point. While they can provide significant savings, there is less specific feedback available for them on this particular ProMaster application. They are a viable option if budget is the primary concern.
Pro Tip: It's All About the Labor
The cost of the sensor itself is small compared to the 3-5 hours of labor a shop will charge to get to it. Spending a little extra on a high-quality Mopar or premium aftermarket sensor is a smart investment to ensure you won't be paying for the same repair again in the near future.
Installation: This is Not a 10-Minute Job
Replacing the oil pressure switch on the ProMaster 2500 is difficult. The sensor is buried deep in the engine valley, underneath the upper and lower intake manifolds. This is a job for an experienced DIYer 🎬 See this replacement walkthrough to prepare for the installation process. or a professional mechanic.
The basic steps involve:
- Disconnecting the battery.
- Removing the upper and lower intake manifolds. This requires new gaskets for reassembly.
- The sensor is located on the oil cooler assembly in the 'V' of the engine.
- Unplug and unscrew the old sensor (a special socket may be needed).
- Install the new sensor and reassemble everything in reverse order.
While you have the intake manifold off, it's a great time to also replace the PCV valve, which is also hard to access.
| Part Type | Estimated Cost |
|---|---|
| New OEM (Mopar) | $60 - $110 |
| New Aftermarket | $40 - $135 |
| Shop Labor | $323 - $474 |
Frequently Asked Questions (FAQ)
Can I ignore a P0520 code?
Some sources suggest the engine computer can estimate oil pressure using other sensors if the main one fails. However, this is risky. A P0520 code means you have no reliable way of knowing your actual oil pressure. You should diagnose the problem immediately to avoid the risk of severe engine damage.
Where is the oil pressure switch located?
It is located in the valley of the 3.6L V6 engine, between the cylinder heads. It's screwed into the oil filter/cooler housing, underneath the intake manifolds.
Is this a DIY job?
For most people, no. Due to the location, it requires significant disassembly of the top part of the engine. If you are not comfortable removing intake manifolds, this job is best left to a professional. The difficulty rating is high.
What tools are needed for the replacement?
You will need a comprehensive socket set, torque wrench, E-torx sockets, and potentially a special deep socket (often 27mm) 🎬 Watch a mechanic demonstrate the tools and steps for this fix. or crowfoot wrench for the sensor itself. You will also need new upper and lower intake manifold gaskets for reassembly.
Helpful Videos
Technical Specifications
OEM Part Numbers: 5149062AA 68334877AA 68295556AA 68095487AA
Located in the engine valley on the oil cooler housing. Requires removal of the upper and lower intake manifolds for access.
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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.
- Ram ProMaster 2500:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Ram ProMaster 2500 Oil Pressure Switch Failing?
- Top 3 Symptoms of a Bad Switch
- A Note on Serious Symptoms
- Known Issues: TSB for 2014 ProMaster
- Choosing the Right Aftermarket Oil Pressure Switch
- Pro Tip: It's All About the Labor
- Installation: This is Not a 10-Minute Job
- Frequently Asked Questions (FAQ)
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