why does my Toyota Corolla E170 (2013-2019) check engine light come on after filling gas

Toyota Corolla E170 (2013-2019)

Error Codes

2-4 hours

Time

medium

Difficulty

medium

Severity

3 min read

562 words

Problem Statement

Learn how to diagnose and fix the check engine light issue after refueling in a 2013-2019 Toyota Corolla E170. Step-by-step guide included.

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.
•Ensure the vehicle is cooled down to avoid burns when working near the engine or fuel system.

Symptoms

•Check engine light illuminated
•Possible fuel odor from the vehicle
•Rough engine idle after refueling
•Difficulty starting the engine after refueling
•Fuel gauge not registering correctly
•Reduced fuel efficiency

Diagnostic Steps

1
Scan for error codes using an OBD-II scanner to identify specific codes related to the check engine light.
2
Inspect the fuel filler cap for cracks, damage, or improper sealing.
3
Check for any visible fuel leaks around the fuel tank and lines.
4
Test the evaporative emission control system (EVAP) for leaks using a smoke machine or pressure test.
5
Inspect the fuel tank pressure sensor and associated wiring for faults.
6
Examine the purge valve and vent valve operation for proper functionality.

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
•Smoke machine
•Socket set
•Torque wrench

Parts Required

•Fuel filler cap (if damaged)
•EVAP purge valve (if faulty)
•Fuel tank pressure sensor (if faulty)

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 specific codes related to the check engine light.
2
Inspect the fuel filler cap for cracks, damage, or improper sealing.
3
Check for any visible fuel leaks around the fuel tank and lines.
4
Test the evaporative emission control system (EVAP) for leaks using a smoke machine or pressure test.
5
Inspect the fuel tank pressure sensor and associated wiring for faults.
6
Examine the purge valve and vent valve operation for proper functionality.

Solution

1. Preparation

Gather necessary tools and parts.
Disconnect the negative battery terminal to prevent electrical shorts during the repair.
Allow the vehicle to cool if it has been running recently.

2. Inspect and Replace Fuel Filler Cap

Sub-steps:
1. Remove the fuel filler cap and visually inspect it for any signs of wear or damage.
2. Clean the sealing surface on the fuel filler neck to ensure a proper seal.
3. If damaged, replace it with a new OEM fuel filler cap.
Tools Required: None specific, but a cleaning cloth may be useful.

3. Test and Repair EVAP System

Sub-steps:
1. Connect a smoke machine to the EVAP service port to check for leaks in the system.
2. Observe for smoke escaping from any potential leak points (hoses, valves, or the charcoal canister).
3. If a leak is found, replace the damaged component (purge valve or charcoal canister, as needed).
Tools Required: Smoke machine, basic hand tools for component removal.

4. Check and Replace Fuel Tank Pressure Sensor

Sub-steps:
1. Locate the fuel tank pressure sensor, typically near the fuel pump assembly.
2. Disconnect the electrical connector and remove the sensor using appropriate tools.
3. Install the new sensor and reconnect the electrical connector.
Tools Required: Socket set, torque wrench (if specified by manufacturer).

5. Clear Error Codes

Sub-steps:
1. Reconnect the negative battery terminal.
2. Use the OBD-II scanner to clear any stored trouble codes.
Tools Required: OBD-II scanner.