Chrysler LHS Engine Oil Pressure Switch Guide: 1994-2001
Understanding the signs of a failing oil pressure switch to protect your LHS engine.
- The most common symptoms are an erratic oil pressure gauge and a flickering oil warning light.
- The switch is located next to the oil filter, making it an easy DIY replacement with a special 1 1/16" socket.
- Always treat an oil pressure warning as a critical issue until you can confirm it's just a bad sensor.
- For a reliable repair, consider a premium aftermarket brand like Standard Ignition (SMP).
Is Your Oil Pressure Gauge Acting Up?
A faulty engine oil pressure switch on a 1994-2001 Chrysler LHS can cause symptoms that might be alarming. Because the part can fail in different ways, you might see a few different signs. The most common issues are directly related to the information you see on your dashboard.
Common Failure Symptoms
- Erratic Gauge Readings: The needle on your oil pressure gauge may behave strangely. It might drop to zero, shoot up to maximum, or bounce around randomly, even when the engine is running smoothly.
- Flickering or Constant Oil Light: The red oil warning light on your dash may flicker, especially at idle when the engine is warm. In other cases, it might stay on constantly, even if you have checked the oil level and it is full.
- Visible Oil Leaks: The switch itself can fail by developing a crack in its plastic housing or a bad seal. This will cause engine oil to leak from the sensor. You may notice an oily residue on the switch or drips on the ground below the engine.
Choosing the Right Aftermarket Switch
For a simple but critical sensor like an oil pressure switch, quality matters. While an OEM Mopar part is always an option, several aftermarket brands offer reliable replacements at a lower cost. Here’s a breakdown of available brand tiers based on general reputation.
- Tier 1 - Premium Aftermarket: Brands like Standard Ignition (Standard Motor Products) are often considered a top-tier aftermarket choice. They are known for extensive testing and quality control, with many parts manufactured in North America. For a critical sensor, this is a reliable choice that often meets or exceeds OEM specifications.
- Tier 2 - Standard Replacement: Brands such as Crown Automotive fall into this category. Crown is well-known for Jeep parts but also produces components for other Chrysler vehicles. User reviews are often mixed; some find the parts to be a good value, while others have reported issues with fitment or longevity. These can be a good budget-friendly option for a DIY repair.
- Tier 3 - Economy Brands: Other brands like Global Parts and Rostra Powertrain are typically focused on providing the most affordable option. While functional, they may not have the same level of engineering or long-term durability as more premium brands.
Cost of Replacing the Oil Pressure Switch
Replacing the oil pressure switch on a Chrysler LHS is an inexpensive repair, whether you do it yourself or take it to a shop. The part itself is affordable, and labor is minimal due to its easy-to-access location.
| Part/Service | Estimated Cost |
|---|---|
| New OEM (Mopar) Switch | $30 - $50 |
| New Aftermarket Switch | $13 - $30 |
| Shop Labor | $50 - $100 |
| Total Professional Repair | $63 - $150 |
Frequently Asked Questions (FAQ)
Where is the oil pressure switch on a 1994-2001 Chrysler LHS?
The oil pressure switch (or sending unit) is located on the engine block, right next to the oil filter. You will need to safely raise the front of the vehicle and look up at the area around the oil filter to see it.
Can I replace the LHS oil pressure switch myself?
Yes, this is a very DIY-friendly job. The location is easy to access. You will need a special deep socket, typically 1 and 1/16th inch, which is made specifically for oil pressure switches. Be prepared for a small amount of oil to spill when you remove the old sensor, so have a drain pan ready.
What tools are needed to replace the oil pressure switch?
The main special tool is a 1 1/16" deep well socket for oil pressure switches. You will also need a socket wrench with a short extension, a drain pan to catch oil, and rags for cleanup. It is also a good idea to wear safety glasses.
What does the trouble code P0520 mean?
The Diagnostic Trouble Code (DTC) P0520 indicates a malfunction in the Engine Oil Pressure Sensor/Switch Circuit. This code is set when the vehicle's computer (ECU) sees a voltage reading from the sensor that is outside the expected range, confirming an electrical problem with the sensor or its wiring.
Technical Specifications
OEM Part Numbers: 4608303AB 4707670AC 5149098AB
Location: Engine block, adjacent to oil filter. Socket Size: 1 1/16 inch, deep well.
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 LHS: