why does my Honda Accord make a knocking noise when I accelerate

Honda Accord 10th Generation (2018-2022)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

511 words

Problem Statement

Learn how to diagnose and fix knocking noise during acceleration in Honda Accord. 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 the oil drain plug or inspecting engine components

Symptoms

•Knocking noise increases in frequency with acceleration
•Possible loss of power during acceleration
•Engine misfire or rough running conditions
•Vibration felt through the steering wheel or floor
•Check engine light may be illuminated

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored diagnostic trouble codes (DTCs)
2
Inspect the engine oil level and condition; low or dirty oil can lead to knocking noises
3
Check for loose or damaged engine mounts that may cause excessive movement and knocking
4
Examine the exhaust system for loose components or leaks that could cause noise under acceleration
5
Perform a visual inspection of the drive belts for wear or damage
6
Test the ignition system components (spark plugs, ignition coils) for wear or failure

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
•Screwdrivers
•Engine oil (if needed)
•Oil filter wrench

Parts Required

•Engine oil
•Oil filter
•Spark plugs
•Engine mounts (if required)

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to check for any stored diagnostic trouble codes (DTCs)
2
Inspect the engine oil level and condition; low or dirty oil can lead to knocking noises
3
Check for loose or damaged engine mounts that may cause excessive movement and knocking
4
Examine the exhaust system for loose components or leaks that could cause noise under acceleration
5
Perform a visual inspection of the drive belts for wear or damage
6
Test the ignition system components (spark plugs, ignition coils) for wear or failure

Solution

1. Preparation

Gather necessary tools and parts. Ensure the vehicle is parked on a level surface and the engine is turned off and cool.
Tools Required:
- OBD-II scanner
- Socket set
- Torque wrench
- Screwdrivers
- Engine oil (if needed)

2. Addressing Engine Oil Issues

Check Oil Level:
- Remove the dipstick, clean it, reinsert, and then remove it again to check the level.
- If low, add the appropriate type of engine oil as specified in the owner's manual.
Change Oil (if needed):
- Drain the old oil using a wrench to remove the oil drain plug.
- Replace the oil filter using an oil filter wrench.
- Reinstall the drain plug and refill with new oil.

3. Inspect and Replace Components

Check Engine Mounts:
- Visually inspect each mount for cracks or wear.
- If damaged, use a socket set to replace them with new mounts.
Examine the Exhaust System:
- Inspect for loose hangers or damaged sections. Tighten or replace as necessary.
Ignition System Check:
- Remove spark plugs using a socket. Inspect for wear, carbon buildup, or damage.
- Replace with new spark plugs if necessary. Torque to manufacturer specifications.