my Ford Mustang S650 (2024-Present) displays a "service engine soon" message, what to check?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked on a level surface and the engine is cool.
• Disconnect the battery before starting any electrical work.

2. Scan and Interpret Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Turn on the ignition (not starting the engine) and retrieve the trouble codes.
• Document the codes and refer to a service manual for specific diagnostics related to those codes.

3. Address Identified Issues

• If codes indicate a faulty sensor (e.g., MAF, O2 sensor):
  • Remove the faulty component.
  • Install a new sensor using the manufacturer’s specifications for torque values.
• If codes suggest a misfire:
  • Replace spark plugs and ignition coils if necessary.
  • Ensure proper gap settings for spark plugs as per manufacturer specifications.

4. Fluid and System Checks

• Check engine oil and replace if dirty or low.
• Inspect the coolant level and top off if necessary.
• Change the air filter if it is clogged or dirty.
• Ensure fuel injectors are clean; consider using a fuel injector cleaner if needed.

5. Reassemble and Reconnect

• Reconnect the battery and ensure all connections are secure.
• Close the hood and prepare for testing.