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

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

528 words

Problem Statement

Learn how to diagnose and fix a 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 opening any components.

Symptoms

•Knocking or tapping noise when accelerating
•Noise increases with engine RPM
•Possible vibrations felt through the cabin
•Loss of power during acceleration
•Check engine light may be illuminated
•Unusual smells or smoke from the engine compartment

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related issues.
2
Inspect the engine mounts for signs of wear or damage.
3
Check the condition of the transmission fluid and inspect for leaks.
4
Examine the exhaust system for loose components or damage.
5
Inspect the drive axles and CV joints for wear or damage.
6
Perform a visual inspection of the engine components for any loose or damaged parts.

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
•Jack
•Jack stands
•Pry bar
•Funnel
•Transmission fluid
•Clean rag
•Wrench set
•Socket set

Parts Required

•Engine mounts (if damaged)
•Transmission fluid (if low or burnt)
•CV joints or axles (if damaged)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any related issues.
2
Inspect the engine mounts for signs of wear or damage.
3
Check the condition of the transmission fluid and inspect for leaks.
4
Examine the exhaust system for loose components or damage.
5
Inspect the drive axles and CV joints for wear or damage.
6
Perform a visual inspection of the engine components for any loose or damaged parts.

Solution

1. Preparation

Gather necessary tools and parts.
Park the vehicle on a flat surface, engage the parking brake, and disconnect the battery.
Allow the engine to cool down before starting work.

2. Inspect Engine Mounts

Sub-steps:
1. Lift the vehicle using a jack and secure it on jack stands.
2. Visually inspect all engine mounts for cracks or separation.
3. Use a pry bar to check for excessive movement in the mounts.
Tools Required: Jack, jack stands, pry bar.

3. Check Transmission Fluid

Sub-steps:
1. Locate the transmission dipstick or fill cap.
2. Remove the dipstick, clean it, and reinsert it to check fluid level.
3. Inspect the fluid for discoloration or burnt smell.
4. If needed, drain and replace the transmission fluid.
Tools Required: Funnel, transmission fluid, clean rag.

4. Examine Exhaust System

Sub-steps:
1. Inspect the exhaust pipes, muffler, and catalytic converter visually.
2. Check for any loose brackets or hangers.
3. Tighten or replace any damaged components.
Tools Required: Wrench set, socket set.

5. Inspect Drive Axles and CV Joints

Sub-steps:
1. Lift the front of the vehicle and secure it on jack stands.
2. Inspect the CV joint boots for tears or grease leakage.
3. Check for play in the axles by wiggling them.
4. Replace any damaged axles or CV joints as necessary.
Tools Required: Jack, jack stands, socket set.