Ram 4000 Engine Oil Pressure Switch Guide for 2011-2017 Models
Seeing your oil pressure gauge jump around or the warning light flicker on your Ram 4000?
- An erratic oil pressure gauge is the most common symptom of a failing sensor on these trucks.
- This is a known issue, and a Technical Service Bulletin (TSB) was issued for similar Ram models.
- While a manageable DIY repair, many owners strongly suggest using an OEM Mopar sensor for best results.
- Never ignore an oil pressure warning; a faulty sensor prevents you from knowing if there's a real, engine-damaging problem.
Is Your Oil Pressure Gauge Lying to You?
A faulty engine oil pressure switch is a common issue on Ram heavy-duty trucks from this generation. The most frequent complaint is an oil pressure gauge that gives wild, erratic readings—often jumping from zero to the maximum of 99 psi and back again for no reason. This can be alarming, but it often points to a bad sensor rather than a true engine oil pressure problem. The sensor can also fail and cause the red oil warning light to flicker or stay on. In some cases, the sensor may leak oil externally, which you might see on the sensor itself or as drips under the truck.
Choosing the Right Aftermarket Part: OEM vs. Standard Ignition
When replacing this sensor, you have a choice between Original Equipment (OEM) from Mopar and aftermarket brands. Many experienced Ram owners and mechanics recommend using the Mopar OEM part, as they have found some aftermarket sensors to be unreliable or fail prematurely for this specific application.
However, reputable aftermarket brands like Standard Ignition offer a quality alternative. Standard Ignition (also known as Standard Motor Products) has been manufacturing parts for over 100 years and produces its sensors in certified facilities. They use durable materials designed to resist heat and prevent the common oil leaks that cause these sensors to fail. An aftermarket part from a known brand like Standard Ignition can be a reliable, cost-effective repair.
Estimated Cost Comparison
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket (Standard Ignition) | $56.71 - $58.27 |
| New OEM (Mopar) | $70 - $110 |
| Shop Labor | $100 - $180 |
Frequently Asked Questions (FAQ)
What are the main signs of a bad oil pressure switch?
The most common signs are an oil pressure gauge that reads erratically (jumping to 0 or 99 psi), a flickering or constant oil warning light, a check engine light with code P0520, and sometimes a visible oil leak from the sensor itself.
Can I replace the oil pressure switch myself?
Yes, this is a DIY-friendly job for someone with basic mechanical skills. The main challenge is the tight access to the sensor, which is typically located just above the oil filter on 5.7L HEMI engines. You will need a special 1-1/16 inch deep socket designed for oil pressure switches.
What happens if I ignore a bad oil pressure switch?
The biggest risk is that you won't know if you have a real low-oil-pressure problem. If the sensor is faulty and you ignore its warnings, you might not be alerted when the engine is actually starving for oil, which can lead to catastrophic engine failure.
Why do so many people recommend an OEM Mopar sensor?
Some owners have reported issues with aftermarket sensors for this specific part, such as incorrect readings or early failure. While quality aftermarket brands exist, the OEM Mopar sensor is often seen as the most reliable, 'one-and-done' fix by the community.
Technical Specifications
OEM Part Numbers: 5149062AA 5149062AB 68060337AA 4799758AD 4799758AF
Fitment and part numbers can vary between the 5.7L HEMI V8 and 6.7L Cummins Diesel engines. The 5.7L HEMI commonly uses part numbers like 5149062AA/AB. The 6.7L Cummins may use a different sensor, such as 4799758AD/AF. Always verify the correct part for your specific engine before ordering.
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.
- Ram 4000: