my Toyota Corolla E170 (2013-2019) has a strong exhaust smell, what’s wrong

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

high

Severity

3 min read

562 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 to diagnose and fix strong exhaust smell in Toyota Corolla E170 (2013-2019). Step-by-step guide with diagnostic procedures and repair instructions.

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 exhaust system to cool before inspection or repair.

Symptoms

•Strong exhaust smell inside and outside the vehicle
•Potential check engine light illuminated
•Decreased fuel efficiency
•Engine misfiring or rough idle
•Increased emissions

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the exhaust system for visible leaks, cracks, or loose connections.
3
Check fuel pressure to ensure it is within manufacturer specifications.
4
Inspect the oxygen sensors for proper function and any signs of damage.
5
Examine the catalytic converter for blockages or failure.
6
Evaluate the fuel injectors for leaks or improper operation.

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
•Jack and jack stands
•Socket set
•Torque wrench
•Fuel pressure gauge
•Safety glasses
•Gloves

Parts Required

•Oxygen sensors (if faulty)
•Catalytic converter (if blocked or damaged)
•Fuel injectors (if leaking or malfunctioning)

Related Faults

Share this solution

Comments

No comments yet

Be the first to share your thoughts

Back to Generation

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify any stored trouble codes.
2
Inspect the exhaust system for visible leaks, cracks, or loose connections.
3
Check fuel pressure to ensure it is within manufacturer specifications.
4
Inspect the oxygen sensors for proper function and any signs of damage.
5
Examine the catalytic converter for blockages or failure.
6
Evaluate the fuel injectors for leaks or improper operation.

Solution

1. Preparation

Tools Required: OBD-II scanner, jack and jack stands, socket set, torque wrench, fuel pressure gauge, safety glasses, gloves.
Ensure the vehicle is on a flat surface and turn off the ignition. Disconnect the battery to ensure safety while working.

2. Inspect Exhaust System

Sub-steps:
1. Raise the vehicle using a jack and secure it with jack stands.
2. Visually inspect the entire exhaust system from the engine to the tailpipe for any signs of leaks, rust, or damage.
3. Use a smoke machine if available to detect leaks more effectively.
4. Tighten any loose connections and replace any damaged sections of the exhaust pipe or muffler.

3. Check Oxygen Sensors

Sub-steps:
1. Locate the oxygen sensors (pre-catalytic and post-catalytic) on the exhaust system.
2. Disconnect the electrical connectors and remove the sensors using a socket wrench.
3. Inspect the sensors for carbon buildup or damage; replace if necessary.
4. Install new oxygen sensors and reconnect the wiring.

4. Inspect Catalytic Converter

Sub-steps:
1. Carefully remove the catalytic converter from the exhaust system.
2. Check for blockages by looking inside the converter or using a vacuum gauge.
3. If blocked or damaged, replace the catalytic converter with a new unit.
4. Reinstall the catalytic converter securely and torque to manufacturer specifications.

5. Test Fuel Injectors

Sub-steps:
1. Remove the fuel rail to access the fuel injectors.
2. Inspect each injector for leaks or discoloration; replace any defective injectors.
3. Reinstall the fuel rail and ensure all connections are secure.