my Toyota Camry XV70 (2018-2024) has a knocking noise when I accelerate, why?

Toyota Camry XV80 (2025-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

545 words

Problem Statement

Learn how to diagnose and fix knocking noise during acceleration in Toyota Camry XV70 (2018-2024). 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 noise from the engine compartment during acceleration
•Possible loss of power or hesitation
•Vibration felt through the accelerator pedal
•Unusual engine sounds at idling
•Check engine light may illuminate

Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes.
2
Inspect engine mounts for wear or damage.
3
Check the condition of the transmission fluid and level.
4
Listen for noise while stationary, revving the engine to isolate the source.
5
Inspect the exhaust system for loose components or leaks.
6
Check for any loose or damaged components in the drivetrain, such as CV joints.

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
•Hydraulic jack
•Jack stands
•Socket set
•Torque wrench
•Fluid pump for transmission fluid
•Screwdrivers

Parts Required

•Engine mounts (if damaged)
•Transmission fluid (Toyota WS)
•CV axle (if defective)

Related Faults

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Diagnostic Steps

1
Scan the vehicle's OBD-II system for error codes.
2
Inspect engine mounts for wear or damage.
3
Check the condition of the transmission fluid and level.
4
Listen for noise while stationary, revving the engine to isolate the source.
5
Inspect the exhaust system for loose components or leaks.
6
Check for any loose or damaged components in the drivetrain, such as CV joints.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface, and the engine is turned off.
Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Engine Mounts (if needed)

Sub-steps:
- Raise the vehicle using a hydraulic jack and secure it with jack stands.
- Locate the engine mounts (typically at the front and rear of the engine).
- Visually inspect the mounts for cracks or deterioration.
- If damaged, remove the bolts securing the mounts using a socket set.
- Replace with new engine mounts from an authorized dealer.
- Torque the bolts to the manufacturer’s specifications (usually around 40-50 ft-lbs).

3. Check and Replace Transmission Fluid (if needed)

Sub-steps:
- Locate the transmission fluid dipstick under the hood.
- Remove the dipstick and check the fluid level and condition.
- If low or burnt, drain the old fluid using a fluid pump.
- Replace with new ATF fluid specified for the Camry (usually Toyota WS).
- Reinsert the dipstick and check the level after refilling.

4. Inspect Drivetrain Components

Sub-steps:
- Check CV joints and axles for wear or damage.
- If knocking noise is associated with a CV joint, remove the wheel and inspect the joint boot for tears.
- If damaged, replace the CV axle with a new unit, ensuring to torque the axle nut to manufacturer specifications (typically around 150 ft-lbs).