why does my Toyota Corolla E170 (2013-2019) have a low oil pressure light on

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

609 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix low oil pressure light issues in Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostics, and repairs.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the engine to cool before opening the oil drain plug or oil filter.

Symptoms

•Low oil pressure warning light on the dashboard
•Engine noise, particularly ticking or knocking sounds
•Decreased engine performance or power loss
•Oil leak under the vehicle
•Engine overheating
•Increased fuel consumption

Diagnostic Steps

1
Check the engine oil level using the dipstick; ensure it is within the recommended range.
2
Inspect the oil for contamination (metal shavings, sludge) and verify its viscosity.
3
Scan the vehicle’s onboard computer with an OBD-II scanner for any error codes related to oil pressure or engine function.
4
Inspect the oil pressure sending unit for leaks or damage.
5
Check the oil pump operation by monitoring oil pressure with a manual gauge.
6
Examine oil passages for blockages or buildup of sludge.

Solution

💡 Expert Tip

For complex repairs like this, consider taking photos at each step. This helps if you need to reverse a step or consult with a mechanic. Also, keep all removed parts organized - you may need to reference them during reassembly.

Verification

After completing the repair, verify that the issue has been resolved:

✓Test the affected component to ensure it functions correctly
✓Check for any error codes or warning lights
✓Monitor the vehicle for a few days to ensure the issue does not recur

Prevention Tips

To prevent this issue from occurring again:

•Follow the manufacturer's recommended maintenance schedule
•Address warning signs early before they develop into major issues
•Use quality parts and fluids recommended for your vehicle
•Keep detailed records of all repairs and maintenance

Tools & Equipment Required

•OBD-II scanner
•Socket set
•Oil filter wrench
•Torque wrench
•Manual oil pressure gauge
•Oil drain pan

Parts Required

•Engine oil (0W-20)
•Oil filter
•Oil pressure sending unit (if needed)
•Oil pump (if needed)

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Diagnostic Steps

1
Check the engine oil level using the dipstick; ensure it is within the recommended range.
2
Inspect the oil for contamination (metal shavings, sludge) and verify its viscosity.
3
Scan the vehicle’s onboard computer with an OBD-II scanner for any error codes related to oil pressure or engine function.
4
Inspect the oil pressure sending unit for leaks or damage.
5
Check the oil pump operation by monitoring oil pressure with a manual gauge.
6
Examine oil passages for blockages or buildup of sludge.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface with the engine off and cool.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Check and Replace Oil

Sub-steps:
1. Remove the oil drain plug using a socket set and allow the old oil to drain completely into a pan.
2. Replace the drain plug and torque it to the manufacturer’s specification (usually around 30 ft-lbs).
3. Replace the oil filter using an oil filter wrench; make sure to lubricate the rubber gasket of the new filter with fresh oil before installation.
4. Refill the engine with the correct grade of engine oil (typically 0W-20 for this model) through the oil filler cap.

3. Inspect and Replace Oil Pressure Sending Unit

Sub-steps:
1. Locate the oil pressure sending unit, typically near the oil filter or engine block.
2. Disconnect the electrical connector and remove the sending unit using a socket.
3. Install the new oil pressure sending unit and reconnect the electrical connector.

4. Test and Replace Oil Pump (if necessary)

Sub-steps:
1. Attach a manual oil pressure gauge to the oil pressure sending unit port.
2. Start the engine and observe the oil pressure reading; it should be within the manufacturer's specified range (usually 10-60 PSI at idle).
3. If pressure is low, the oil pump may need to be replaced. Drain the oil, remove the oil pan, and replace the oil pump following the specific service manual instructions.