my Toyota Camry XV70 (2018-2024) has a strange smell coming from the engine, what could it be?

Toyota Camry XV80 (2025-Present)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

523 words

Problem Statement

Learn how to diagnose and fix strange smells from the engine in a 2018-2024 Toyota Camry XV70. 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 hood to prevent burns
•Ensure proper ventilation when working in the engine compartment

Symptoms

•Strange odor from the engine compartment
•Possible overheating of the engine
•Fluid leaks under the vehicle
•Check engine light illuminated
•Smoke or steam visible from the engine area

Diagnostic Steps

1
Inspect the engine bay for visible fluid leaks (oil, coolant, or transmission fluid)
2
Check the coolant level and inspect the radiator for any signs of damage or leaks
3
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs)
4
Inspect the condition of belts and hoses for any signs of wear or melting
5
Look for signs of burnt oil or overheated components, such as discoloration or a burnt smell
6
Verify the condition of the exhaust system for leaks or unusual smells

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
•Screwdrivers
•Pliers
•Belt tensioner tool
•Hose clamp pliers

Parts Required

•Replacement belts and hoses (if damaged)
•Coolant
•Radiator or water pump (if necessary)

Related Faults

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Diagnostic Steps

1
Inspect the engine bay for visible fluid leaks (oil, coolant, or transmission fluid)
2
Check the coolant level and inspect the radiator for any signs of damage or leaks
3
Use an OBD-II scanner to check for any diagnostic trouble codes (DTCs)
4
Inspect the condition of belts and hoses for any signs of wear or melting
5
Look for signs of burnt oil or overheated components, such as discoloration or a burnt smell
6
Verify the condition of the exhaust system for leaks or unusual smells

Solution

1. Preparation

Ensure the engine is cool before starting any work.
Disconnect the battery to prevent electrical shorts.
Gather tools and parts for the repair.

2. Identify and Fix Fluid Leaks

Sub-steps:
1. Clean the engine bay with a degreaser to remove old oil or fluid residues.
2. Use a flashlight to inspect for leaks; focus on gaskets, seals, and hoses.
3. Replace any damaged hoses or gaskets using the appropriate OEM parts.
  - Tools Required: Socket set, screwdrivers, and pliers.

3. Replace Overheated Components

Sub-steps:
1. If any belts are worn or melted, replace them with new belts.
2. Inspect and replace any hoses that show signs of damage.
  - Tools Required: Belt tensioner tool, hose clamp pliers.

4. Address Coolant Issues

Sub-steps:
1. If coolant levels are low, refill with the manufacturer-recommended coolant.
2. If any leaks are found in the radiator or water pump, replace the damaged component.
  - Parts Required: New coolant, radiator or water pump (if necessary).

5. Clean and Test

Sub-steps:
1. After repairs, clean any spilled fluids from the engine bay.
2. Reconnect the battery and start the engine, allowing it to reach operating temperature.
3. Monitor for any strange smells or leaks.
  - Safety Warnings: Ensure proper ventilation when working in the engine compartment.