my Honda CR-V has a persistent check engine light, what could it be

Solution

1. Preparation

• Tools Required: OBD-II scanner, socket set, fuel pressure gauge, multimeter, basic hand tools.
• Allow the engine to cool before starting work.

2. Address Error Codes

• Use the OBD-II scanner to read error codes.
• Research the specific error codes to determine potential issues (e.g., P0420 for catalytic converter efficiency).

3. Inspect and Replace Spark Plugs

• Remove engine cover if applicable.
• Disconnect ignition coils and remove spark plugs using a socket.
• Inspect spark plugs for wear; replace if worn or fouled.
• Torque new spark plugs to the manufacturer’s specifications (typically around 13-15 ft-lbs).

4. Check and Replace Air Filter

• Locate the air intake box and release clips to open it.
• Remove the old air filter and inspect for dirt or damage.
• Install a new air filter, ensuring it is seated properly.

5. Fuel System Inspection

• Connect the fuel pressure gauge to the fuel rail.
• Turn the ignition to the “ON” position (do not start) to check fuel pressure.
• If pressure is low, check for clogged fuel filters or malfunctioning fuel pumps; replace as necessary.

6. Inspect Exhaust System

• Visually check for any holes or breaks in the exhaust pipes.
• Use a smoke test if necessary to identify leaks.
• Repair or replace damaged sections of the exhaust system.