why is my Toyota Corolla E170 (2013-2019) using so much gas lately

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

530 words

Problem Statement

Learn how to diagnose and fix fuel consumption issues in the 2013-2019 Toyota Corolla E170. Step-by-step guide with symptoms, diagnostic steps, and solutions.

Affected Component

Fuel System

Estimated Time

2-4 hours

⚠️ Safety Warnings

Important safety information - read before proceeding

•Disconnect the battery before working on electrical components.
•Allow the engine to cool before performing any inspections.

Symptoms

•Noticeable decrease in miles per gallon (MPG)
•Check engine light illuminated
•Rough idle or engine hesitation
•Unusual exhaust odor (e.g., strong fuel smell)
•Increased frequency of refueling
•Poor acceleration response

Diagnostic Steps

1
Scan the vehicle’s onboard computer for error codes using an OBD-II scanner.
2
Inspect the air filter for dirt or clogging that could restrict airflow.
3
Check the fuel pressure using a fuel pressure gauge to ensure it meets specifications.
4
Examine the fuel injectors for leaks or clogs.
5
Review tire pressure and condition; low tire pressure can affect fuel economy.
6
Inspect for exhaust leaks or issues with the catalytic converter.

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
•Basic hand tools
•Tire pressure gauge

Parts Required

•Air filter
•Fuel injector cleaner
•Fuel filter (if low pressure is detected)

Related Faults

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Diagnostic Steps

1
Scan the vehicle’s onboard computer for error codes using an OBD-II scanner.
2
Inspect the air filter for dirt or clogging that could restrict airflow.
3
Check the fuel pressure using a fuel pressure gauge to ensure it meets specifications.
4
Examine the fuel injectors for leaks or clogs.
5
Review tire pressure and condition; low tire pressure can affect fuel economy.
6
Inspect for exhaust leaks or issues with the catalytic converter.

Solution

1. Preparation

Gather tools and parts: OBD-II scanner, fuel pressure gauge, basic hand tools, replacement air filter, fuel injector cleaner.
Ensure the vehicle is parked on a level surface and the engine is cool.

2. Scan for Error Codes

Connect the OBD-II scanner to the vehicle’s diagnostic port.
Turn the ignition to the "ON" position without starting the engine.
Retrieve any stored error codes and note them for further inspection.

3. Inspect Air Filter

Locate the air filter housing and open it.
Remove the air filter and inspect it for dirt and debris.
Replace with a new air filter if it is clogged or dirty.

4. Check Fuel Pressure

Connect the fuel pressure gauge to the fuel rail’s service port.
Start the engine and observe the pressure reading; it should match the manufacturer’s specifications (typically around 43-50 psi).
If the pressure is low, check the fuel pump and fuel filter for issues.

5. Clean or Replace Fuel Injectors

If fuel injectors are suspected to be clogged, use a fuel injector cleaner or remove them for cleaning.
For removal, disconnect the fuel line, electrical connectors, and mounting bolts.
Clean with an ultrasonic cleaner or replace if necessary.

6. Inspect Tire Pressure and Condition

Check the tire pressure with a tire pressure gauge and inflate to the manufacturer's recommended PSI.
Inspect tires for wear and alignment issues; replace if necessary.