my Honda Civic 9th Generation (2012-2015) engine light keeps coming back after reset

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the negative battery terminal to prevent electrical shock.
• Allow the engine to cool if it has been running.

2. Address Trouble Codes

• Sub-step 1: Refer to the OBD-II scanner results and note all trouble codes.
• Sub-step 2: Research specific fixes related to the trouble codes retrieved (e.g., P0420 for catalytic converter efficiency).
• Sub-step 3: Correct any issues indicated by the codes, such as replacing faulty sensors or components.

3. Inspect and Repair Wiring

• Sub-step 1: Visually inspect the engine harness and connectors for frayed wires or corrosion.
• Sub-step 2: Clean any corroded connectors with electrical contact cleaner.
• Sub-step 3: Repair or replace any damaged wiring as necessary.

4. Check Air Intake System

• Sub-step 1: Inspect the air filter and replace it if dirty or clogged.
• Sub-step 2: Use a smoke machine to check for vacuum leaks in the intake manifold and hoses.
• Sub-step 3: Seal any leaks found with appropriate gasket maker or replace damaged hoses.

5. Test Fuel System

• Sub-step 1: Connect a fuel pressure gauge to the fuel rail.
• Sub-step 2: Start the engine and observe the pressure reading; it should match manufacturer specifications.
• Sub-step 3: If pressure is low, inspect the fuel pump and filter for issues.

6. Inspect Ignition System

• Sub-step 1: Remove the spark plugs and inspect them for wear or fouling.
• Sub-step 2: Replace any faulty spark plugs with new ones that match specifications.
• Sub-step 3: Test ignition coils with a multimeter to ensure they are functioning properly; replace if necessary.

Tools Required:

• OBD-II scanner
• Multimeter
• Fuel pressure gauge
• Socket set
• Torque wrench
• Electrical contact cleaner

Parts Required:

• Spark plugs
• Ignition coils (if faulty)
• Air filter
• Fuel filter
• Wiring connectors (if damaged)

Estimated Repair Time: 2-4 hours

Safety Warnings:

• Disconnect the battery before working on electrical systems.
• Allow the engine to cool before inspecting components to avoid burns.