my Tesla Outback 5th Generation (2015-2019) has a weird smell coming from the exhaust

Subaru Outback 5th Generation (2015-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

571 words

Problem Statement

Learn how to diagnose and fix unusual exhaust smells in Tesla Outback 2015-2019. 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

•Allow the engine to cool before working on the exhaust system.
•Disconnect the battery before performing any electrical work.

Symptoms

•Unusual smell from the exhaust, possibly resembling burning oil or sulfur
•Check engine light illuminated
•Decreased fuel efficiency
•Engine misfiring or rough running condition
•Visible smoke from the exhaust

Diagnostic Steps

1
Scan for diagnostic trouble codes (DTCs) using an OBD-II scanner to identify potential issues.
2
Inspect the exhaust system visually for any signs of leaks, corrosion, or damage.
3
Check the engine oil level and condition; look for signs of contamination or excessive consumption.
4
Measure the fuel trim using a scan tool to assess air-fuel mixture problems.
5
Inspect the spark plugs for wear or fouling that could indicate combustion issues.
6
Examine the catalytic converter for signs of failure or blockage.

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
•Spark plug socket
•Torque wrench
•Oil filter wrench

Parts Required

•Spark plugs
•Catalytic converter (if needed)
•Engine oil
•Oil filter

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Diagnostic Steps

1
Scan for diagnostic trouble codes (DTCs) using an OBD-II scanner to identify potential issues.
2
Inspect the exhaust system visually for any signs of leaks, corrosion, or damage.
3
Check the engine oil level and condition; look for signs of contamination or excessive consumption.
4
Measure the fuel trim using a scan tool to assess air-fuel mixture problems.
5
Inspect the spark plugs for wear or fouling that could indicate combustion issues.
6
Examine the catalytic converter for signs of failure or blockage.

Solution

1. Preparation

Gather tools and parts required for the repair.
Park the vehicle on a level surface and engage the parking brake.
Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Replace Spark Plugs

Remove the engine cover (if applicable) using a socket set.
Disconnect the ignition coils and remove them from the spark plugs.
Use a spark plug socket to remove the old spark plugs.
Inspect the old spark plugs; replace any that are fouled or worn.
Install new spark plugs, ensuring they are gapped correctly according to manufacturer's specifications (typically around 0.028-0.032 inches).
Reconnect the ignition coils and engine cover.

3. Inspect and Replace the Catalytic Converter (if required)

Locate the catalytic converter along the exhaust system.
Unbolt the catalytic converter from both the exhaust manifold and the exhaust piping using a socket set.
Inspect the old catalytic converter for damage or blockage.
Install the new catalytic converter, ensuring proper alignment and torque to the manufacturer's specifications (usually around 25-30 lb-ft).
Reattach any heat shields that were removed.

4. Check and Replace Engine Oil (if needed)

Remove the oil drain plug and let the old oil drain into a pan.
Replace the oil filter using an oil filter wrench.
Install a new oil filter and replace the drain plug.
Add new engine oil that meets the manufacturer's specifications (consult the owner's manual for type and capacity).