why does my Toyota Corolla E170 (2013-2019) make a knocking noise when I accelerate

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

582 words

Problem Statement

Learn to diagnose and fix knocking noise during acceleration in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic 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 engine to cool before inspecting or working on it.

Symptoms

•Knocking or banging noise during acceleration
•Noise increases with engine RPM
•Possible vibrations felt through the floor or steering wheel
•Reduced power during acceleration
•Possible check engine light illuminated

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related engine or transmission issues.
2
Inspect engine mounts for signs of wear or damage, as faulty mounts can cause knocking noises.
3
Check for loose or damaged exhaust components that may cause noise during acceleration.
4
Examine the suspension system for worn bushings, struts, or other components that could lead to knocking sounds.
5
Test drive the vehicle to replicate the noise and determine if it correlates with engine load or speed.
6
Inspect the transmission fluid level and condition, as low or dirty fluid can lead to transmission issues.

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
•Jack and jack stands
•Torque wrench

Parts Required

•Engine mounts (if damaged)
•Exhaust hangers or components (if needed)
•Suspension bushings or struts (if worn)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related engine or transmission issues.
2
Inspect engine mounts for signs of wear or damage, as faulty mounts can cause knocking noises.
3
Check for loose or damaged exhaust components that may cause noise during acceleration.
4
Examine the suspension system for worn bushings, struts, or other components that could lead to knocking sounds.
5
Test drive the vehicle to replicate the noise and determine if it correlates with engine load or speed.
6
Inspect the transmission fluid level and condition, as low or dirty fluid can lead to transmission issues.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, jack and jack stands, torque wrench.
Safely park the vehicle on a level surface and engage the parking brake.
Disconnect the battery to prevent any electrical issues.

2. Inspect Engine Mounts

Locate the engine mounts, typically found on either side of the engine.
Visually inspect for any cracks, breaks, or excessive wear.
Sub-steps:
1. Remove any components obstructing access to the mounts (e.g., air intake).
2. Use a socket set to unbolt the mounts if replacement is necessary.
3. Install new engine mounts if found defective, ensuring proper alignment and torque as per manufacturer specifications.

3. Check Exhaust System

Visually inspect the exhaust system from the manifold to the tailpipe.
Sub-steps:
1. Look for loose hangers, cracks, or holes in the exhaust pipes and muffler.
2. Tighten any loose bolts or replace damaged exhaust components as necessary.

4. Inspect Suspension Components

Check the suspension components, especially the struts and bushings.
Sub-steps:
1. Lift the vehicle using a jack and secure it with jack stands.
2. Inspect bushings for signs of wear or damage and replace them if necessary.
3. Check the struts for leaks or physical damage and replace if needed.

5. Transmission Fluid Check

Check the transmission fluid level and condition.
Sub-steps:
1. Locate the transmission dipstick and remove it.
2. Wipe it clean, reinsert, and remove to check the fluid level.
3. If low, add the appropriate type of transmission fluid (consult the owner’s manual).
4. If dirty, consider a transmission fluid change.