why does my Toyota Corolla E170 (2013-2019) have a strange smell coming from the exhaust

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

567 words

Problem Statement

Discover how to diagnose and resolve strange exhaust smells in your Toyota Corolla E170 (2013-2019). Follow our step-by-step guide for effective solutions.

Affected Component

Exhaust System

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 inspecting the exhaust system.

Symptoms

•Unpleasant odor from the exhaust
•Decreased fuel efficiency
•Engine performance issues
•Check engine light illuminated
•Excessive smoke from the exhaust

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the fuel system for leaks or contamination, including checking the fuel injectors and fuel lines.
3
Check the engine oil for contamination, including coolant or fuel dilution.
4
Examine the catalytic converter for damage or blockage.
5
Inspect the exhaust system for leaks or damage that could alter exhaust flow and smell.
6
Conduct a visual check of the air filter and intake system for any obstructions or issues.

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
•Fuel pressure gauge
•Wrench set
•Oil dipstick
•Coolant tester
•Jack and jack stands
•Exhaust pipe cutter
•Socket set

Parts Required

•Oil filter
•Engine oil
•Fuel injectors (if leaks are found)
•Catalytic converter (if damaged)
•Exhaust gaskets or clamps (if leaks are found)

Related Faults

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Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the fuel system for leaks or contamination, including checking the fuel injectors and fuel lines.
3
Check the engine oil for contamination, including coolant or fuel dilution.
4
Examine the catalytic converter for damage or blockage.
5
Inspect the exhaust system for leaks or damage that could alter exhaust flow and smell.
6
Conduct a visual check of the air filter and intake system for any obstructions or issues.

Solution

1. Preparation

Gather necessary tools and parts.
Ensure the vehicle is parked on a level surface and the engine is off.
Disconnect the battery to ensure safety while working.

2. Fuel System Inspection

Tools Required: Fuel pressure gauge, wrench set
Remove the fuel pump fuse and start the engine until it stalls to relieve fuel pressure.
Visually inspect fuel lines and injectors for leaks.
If any leaks are found, replace the faulty components.

3. Oil and Coolant Inspection

Tools Required: Oil dipstick, coolant tester
Check the oil level and condition. If the oil smells burnt or has a milky appearance, it may be contaminated.
If contamination is found, perform an oil change and replace the oil filter.
Check coolant levels and inspect for leaks. If coolant is found in the oil, further investigation into head gasket integrity is required.

4. Catalytic Converter Examination

Tools Required: Jack and jack stands, exhaust pipe cutter
Raise the vehicle and inspect the catalytic converter for any physical damage or signs of overheating (discoloration).
If the catalytic converter is blocked or damaged, it needs to be replaced.

5. Exhaust System Check

Tools Required: Socket set, exhaust pipe clamp tool
Inspect the entire exhaust system for leaks or damaged components.
Tighten or replace any loose bolts or damaged sections.