why does my Honda Pilot YF4 (2023-Present) engine light keep coming back?

Solution

1. Preparation

• Gather tools: OBD-II scanner, socket set, multimeter, fuel pressure gauge, and safety glasses.
• Disconnect the battery to prevent electrical shorts during repair.

2. Address Diagnostic Codes

• Using the OBD-II scanner, document any error codes.
• Research the codes to determine the specific issue (e.g., P0420 for catalytic converter efficiency).

3. Inspect and Replace Components

• Gas Cap Inspection:
  • Remove the gas cap and inspect for cracks or damage.
  • Replace with a new gas cap if necessary.
• Oil Change:
  • If the oil is low or dirty, drain the old oil using a socket set, replace the oil filter, and refill with the manufacturer-recommended oil type.
• Air Filter Replacement:
  • Remove the air filter housing cover, replace the air filter with a new one, and secure the housing.
• Fuel System Check:
  • Attach the fuel pressure gauge to the fuel rail, turn the ignition on (do not start), and check for proper pressure (consult manufacturer specs).
  • If pressure is low, inspect the fuel pump and replace it if faulty.

4. Exhaust System Inspection

• Visually inspect the exhaust system for any visible cracks or holes.
• If a leak is found, replace the damaged section or the entire exhaust system as needed.

5. Reconnect Battery and Clear Codes

• Reconnect the battery terminals tightly.
• Clear the error codes using the OBD-II scanner and reset the check engine light.