what does it mean if my Toyota Highlander Third Generation (2014-2019) is showing a low oil pressure...

Solution

1. Preparation

• Gather tools and materials: oil, oil filter, socket set, torque wrench, mechanical oil pressure gauge, multimeter.
• Ensure the vehicle is parked on a level surface and turn off the engine. Allow it to cool before starting work.

2. Check and Top Off Engine Oil

• Locate the oil filler cap on the engine.
• Remove the cap and add the recommended oil type if the level is low.
• Recheck oil levels with the dipstick, ensuring it is within the acceptable range.
• Replace the oil filler cap securely.

3. Replace Oil Filter

• Use a socket set to remove the old oil filter.
• Apply a thin layer of new oil to the gasket of the new oil filter.
• Install the new oil filter and tighten it according to the manufacturer’s specifications (typically hand-tight plus a quarter turn).

4. Change Engine Oil

• Place a drain pan under the oil pan and remove the drain plug with a socket wrench.
• Allow the old oil to fully drain.
• Reinstall the drain plug and torque it to the manufacturer's specifications.
• Fill the engine with fresh oil through the oil filler cap, using the recommended oil type and quantity.

5. Test Oil Pressure

• Remove the oil pressure sending unit.
• Install the mechanical oil pressure gauge in place of the sending unit.
• Start the engine and observe the oil pressure reading on the gauge. It should be within the specified range (typically 10-60 psi at idle).
• If pressure is low, further investigate the oil pump and internal engine components.