why does my Toyota Corolla E170 (2013-2019) have a constant knocking noise?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

481 words

Problem Statement

Learn how to diagnose and fix a constant knocking noise in your Toyota Corolla E170. Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Suspension

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical systems.
•Allow the vehicle to cool before working on the engine or suspension components.

Symptoms

•Constant knocking noise, audible during acceleration and deceleration
•Possible vibration felt through the steering wheel or floorboard
•Increased noise when turning or going over bumps
•Potential loss of power or sluggish acceleration
•Abnormal tire wear or uneven traction

Diagnostic Steps

1
Inspect the engine bay for loose components or mounts.
2
Check the condition of the engine oil and its level.
3
Raise the vehicle and inspect the suspension components for wear or damage.
4
Examine the CV joints and axles for wear or damage.
5
Use a stethoscope or mechanic's listen to pinpoint the noise source.
6
Check for any error codes using an OBD-II scanner.

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

•Socket set
•Torque wrench
•OBD-II scanner
•Jack and jack stands
•Mechanic's stethoscope

Parts Required

•Engine oil (SAE 0W-20)
•Replacement suspension components (if needed)

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Diagnostic Steps

1
Inspect the engine bay for loose components or mounts.
2
Check the condition of the engine oil and its level.
3
Raise the vehicle and inspect the suspension components for wear or damage.
4
Examine the CV joints and axles for wear or damage.
5
Use a stethoscope or mechanic's listen to pinpoint the noise source.
6
Check for any error codes using an OBD-II scanner.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is cool.
Disconnect the battery to ensure safety during repairs.

2. Inspect and Tighten Components

Sub-steps:
- Visually inspect all accessible bolts and nuts in the engine bay, focusing on the engine mounts.
- Use a socket set to tighten any loose bolts found.

3. Check Engine Oil

Sub-steps:
- Remove the dipstick and check the oil level and condition.
- If oil is low, add the recommended oil type (SAE 0W-20 for E170).
- If the oil is dirty or contaminated, drain the old oil and replace it with new oil.

4. Inspect Suspension and Drivetrain

Sub-steps:
- Raise the vehicle using a jack and secure it with jack stands.
- Visually inspect struts, control arms, and bushings for signs of wear or damage.
- Check the CV joints and axles for any tears or leaks in the boots.
- Replace any damaged suspension components using a torque wrench to ensure proper tightening.

5. Test Drive

Sub-steps:
- Lower the vehicle and reconnect the battery.
- Start the engine and take a test drive to see if the knocking noise persists.