why does my Toyota Corolla E170 (2013-2019) have a knocking sound when accelerating?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

569 words

Problem Statement

Learn how to diagnose and fix knocking sound during acceleration in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures and repair instructions.

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 inspecting components to avoid burns.

Symptoms

•Knocking or tapping noise when accelerating
•Noise may increase with engine RPM
•Potential vibration felt through the floor or steering wheel
•Loss of power during acceleration
•Check engine light may illuminate (if related to engine knock)

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any underlying engine issues.
2
Inspect the engine and transmission mounts for signs of wear or damage.
3
Check the oil level and condition; low or dirty oil can cause knocking sounds.
4
Inspect the ignition system, including spark plugs and ignition coils, for wear or malfunction.
5
Examine the exhaust system for loose components or damage that may cause noise.
6
Test drive the vehicle to replicate the noise under various acceleration conditions.

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
•Torque wrench
•Oil filter wrench
•Hydraulic jack
•Jack stands

Parts Required

•Engine oil (0W-20 or 5W-20)
•Oil filter
•Spark plugs
•Ignition coils (if defective)
•Engine/transmission mounts (if defective)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any underlying engine issues.
2
Inspect the engine and transmission mounts for signs of wear or damage.
3
Check the oil level and condition; low or dirty oil can cause knocking sounds.
4
Inspect the ignition system, including spark plugs and ignition coils, for wear or malfunction.
5
Examine the exhaust system for loose components or damage that may cause noise.
6
Test drive the vehicle to replicate the noise under various acceleration conditions.

Solution

1. Preparation

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

2. Inspect and Replace Engine Oil (if necessary)

Sub-steps:
1. Remove the oil drain plug using a socket set and drain the old oil into a suitable container.
2. Replace the oil filter using an oil filter wrench.
3. Reinstall the drain plug and torque to the manufacturer’s specifications (typically 30 ft-lbs).
4. Fill the engine with new oil as specified in the owner’s manual (typically 0W-20 or 5W-20).
5. Start the engine and let it run for a few minutes, then recheck oil level and top off if necessary.

3. Inspect and Replace Ignition Components (if necessary)

Sub-steps:
1. Remove the engine cover (if applicable) using the appropriate socket.
2. Disconnect the ignition coils and remove them using a socket set.
3. Inspect spark plugs for wear; replace if necessary by unscrewing them with a spark plug socket.
4. Install new spark plugs with a torque specification of 13 ft-lbs.
5. Reinstall ignition coils and reconnect electrical connectors.

4. Inspect and Replace Engine/Transmission Mounts (if necessary)

Sub-steps:
1. Lift the vehicle using a hydraulic jack and secure with jack stands.
2. Locate and inspect the engine and transmission mounts for cracks or deterioration.
3. Remove the bolts securing any damaged mounts using a socket set.
4. Replace with new mounts and torque to manufacturer specifications (typically 40-60 ft-lbs).
5. Lower the vehicle and test for noise.