why does my Toyota Corolla E170 (2013-2019) emit a burning smell while driving?

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

4 min read

643 words

⚠️ Safety Warning

This issue requires immediate attention. If you are not experienced with automotive repairs, consult a professional mechanic. Working on critical systems can be dangerous.

Problem Statement

Learn how to diagnose and fix a burning smell in your Toyota Corolla E170 (2013-2019). Step-by-step guide with symptoms, diagnostic steps, and repair instructions.

Affected Component

Engine

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Engine oil can be hot; allow time to cool before handling.
•Ensure the vehicle is securely supported before working underneath it.

Symptoms

•Burning odor noticeable inside or outside the vehicle
•Smoke rising from the engine bay or undercarriage
•Increased engine temperature
•Unusual noises from the engine or transmission
•Warning lights illuminated on the dashboard (e.g., check engine or oil pressure)

Diagnostic Steps

1
Inspect engine oil level and condition to check for leaks or burning.
2
Scan for error codes using an OBD-II scanner to identify any issues.
3
Visually inspect the engine bay for signs of burnt wiring, plastic components, or fluid leaks.
4
Examine the brake system for overheating or sticking calipers that may produce a burning smell.
5
Check the transmission fluid level and condition, looking for signs of overheating or burning.
6
Inspect the exhaust system for signs of leaking fluids or damaged components.

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
•Multimeter
•Inspection mirror

Parts Required

•Engine oil (SAE 0W-20)
•Oil filter
•Transmission fluid (Toyota ATF WS)
•Brake pads (if necessary)
•Wiring harness (if damaged)

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Diagnostic Steps

1
Inspect engine oil level and condition to check for leaks or burning.
2
Scan for error codes using an OBD-II scanner to identify any issues.
3
Visually inspect the engine bay for signs of burnt wiring, plastic components, or fluid leaks.
4
Examine the brake system for overheating or sticking calipers that may produce a burning smell.
5
Check the transmission fluid level and condition, looking for signs of overheating or burning.
6
Inspect the exhaust system for signs of leaking fluids or damaged components.

Solution

1. Preparation

Tools Required: OBD-II scanner, socket set, jack and jack stands, multimeter, inspection mirror
Park the vehicle on a level surface and engage the parking brake.
Allow the engine to cool before starting any inspections.

2. Check and Replace Engine Oil

Sub-steps:
1. Open the hood and remove the dipstick to check the oil level.
2. If low, add oil of the recommended type (SAE 0W-20).
3. If oil appears burnt (dark and has a burnt smell), perform an oil change.
  - Drain the old oil using an oil drain pan.
  - Replace the oil filter and refill with new oil.
Safety Warning: Engine oil can be hot; allow time to cool before handling.

3. Inspect and Repair Wiring

Sub-steps:
1. With the engine off, visually inspect all wiring harnesses for any signs of melting or fraying.
2. Use a multimeter to check for short circuits or damaged connections.
3. Repair or replace any damaged wiring as necessary.
Tools Required: Multimeter, electrical tape or heat-shrink tubing for repairs.

4. Brake Inspection and Adjustment

Sub-steps:
1. Lift the vehicle using a jack and secure it with jack stands.
2. Remove the wheel to access the brake components.
3. Inspect brake calipers for sticking or overheating; check brake pads for excessive wear.
4. Replace any worn components and ensure calipers are functioning properly.
Safety Warning: Ensure the vehicle is securely supported before working underneath it.

5. Transmission Fluid Check and Change

Sub-steps:
1. Check the transmission fluid level via the dipstick while the engine is running.
2. If the fluid is low or burnt, drain the transmission fluid.
3. Replace it with the manufacturer-recommended transmission fluid (typically Toyota ATF WS).
Tools Required: Transmission fluid pump, socket set.