Engine Oil Pressure Switch Guide for the 1985-1993 Chrysler Imperial
Is the oil light in your 1985-1993 Chrysler Imperial acting up? It might be time for a new engine oil pressure switch.
- A flickering oil light is the most common sign of a bad switch, but always check your oil level first.
- This is a simple and inexpensive DIY repair that most owners can perform in under 30 minutes.
- Quality aftermarket brands like Standard Ignition and Rostra Powertrain are reliable choices for this part.
- Do not ignore the warning light, as you can't be sure if it's a bad sensor or a real low-pressure problem that could destroy your engine.
Is Your Imperial's Oil Light On?
A flickering or constantly lit oil pressure light is one of the most common signs of a failing oil pressure switch. Because this part is relatively inexpensive and easy to replace, it's often the first thing to check if you're experiencing oil pressure warnings but your oil level is correct. Ignoring the warning can be risky; you won't know if a real, engine-destroying low-pressure situation occurs.
Symptoms of a Failing Oil Pressure Switch
- Flickering or Illuminated Oil Light: The most common symptom is an oil warning light that flickers or stays on, even when the oil level is full. This can happen when the internal components of the switch wear out and send false signals. 🎬 Watch this video to learn more about bad sensor symptoms.
- Incorrect Gauge Reading: If your Imperial has an oil pressure gauge, a bad switch can cause the needle to read zero, max out, or swing back and forth wildly.
- Visible Oil Leak: The switch itself can fail, causing oil to leak. You may see oily residue on the sensor or drips on the ground below it.
First, Check Your Oil Level
Before assuming the switch is bad, always check your engine's oil level with the dipstick. A low oil level is a serious issue that will also trigger the oil pressure light. If the oil level is low, top it off and see if the light goes out. If the level is correct, the switch is the likely culprit.
Choosing the Right Aftermarket Switch
For a vehicle like the 1985-1993 Chrysler Imperial, new OEM parts can be hard to find or discontinued. High-quality aftermarket parts are a reliable and cost-effective solution. The two main brands available are Standard Ignition and Rostra Powertrain.
- Standard Ignition (Standard Motor Products): Standard is a well-respected aftermarket brand with a long history of producing quality electronic components. Their oil pressure switches are known for robust design and are 100% tested to ensure they meet or exceed OE specifications for performance and durability. They are often a top choice for professional technicians. 🎬 See how Standard Ignition tests their switches for durability.
- Rostra Powertrain: Rostra is also a certified manufacturer of both OE and aftermarket parts, specializing in transmission and powertrain electronics. While well-known for transmission components, they also produce a range of sensors and switches that are tested to high standards. They represent a solid and dependable option for this repair.
Cost of Replacement
| Part Type | Estimated Cost |
|---|---|
| New Aftermarket | $15.27 - $42.74 |
| Shop Labor | $50 - $100 |
Cost estimates are for the part only and do not include taxes or shipping. Labor costs can vary by location.
Pro Tip: Switch vs. Sending Unit
These terms are often used interchangeably, but they are different. A switch is a simple on/off device for a warning light. A sending unit or sensor provides a variable signal for a moving gauge. Make sure you order the correct part for your Imperial's dashboard configuration (light or gauge).
Frequently Asked Questions
Can I replace the oil pressure switch myself?
Yes, this is a very DIY-friendly job for most home mechanics. It typically involves disconnecting the electrical connector, using a wrench or a special oil pressure switch socket to unscrew the old part, and installing the new one. The switch is usually located on the engine block, often near the oil filter.
Are there any recalls for the Chrysler Imperial oil pressure switch?
No, there are no specific recalls for the engine oil pressure switch on the 1985-1993 Chrysler Imperial. Any issues with this part are typically due to age and normal wear.
What happens if I ignore a bad oil pressure switch?
Ignoring it is a gamble. If the switch is faulty and stuck "on," you lose the ability to be warned of an actual low oil pressure problem, which can lead to catastrophic engine failure. If the switch has failed and doesn't turn the light on when pressure is truly low, severe engine damage can occur without warning.
🎬 Learn why you shouldn't ignore these nine warning signs.Can a bad oil pressure switch cause a Check Engine Light?
Yes. On some vehicles, a failing oil pressure sensor can send signals that the car's computer finds illogical, triggering the Check Engine Light. Diagnostic codes like P0520 or P0522 often point to a problem with the oil pressure sensor circuit.
Helpful Videos
Technical Specifications
OEM Part Numbers: 4687712 4707015 4707015AB 5233397
The part is a single-terminal switch that activates a dashboard warning light. It threads into the engine block. Some models may use a variable pressure sending unit for a gauge instead of a switch.
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.
- Chrysler Imperial: