Skoda Octavia NFL (2020-Present) hard to start in cold weather, what's the cause?

Solution

1. Preparation

• Gather necessary tools and parts.
• Ensure the vehicle is parked in a safe, well-ventilated area.
• Disconnect the battery to prevent electrical shocks.

2. Battery Inspection and Replacement

• Sub-steps:
  1. Remove the battery terminals, starting with the negative terminal.
  2. Use a multimeter to measure the battery voltage; it should be above 12.6 volts.
  3. If the battery is weak, replace it with a new one of the same specifications.
  4. Clean the battery terminals and cable ends with a wire brush to ensure a good connection.
  5. Reconnect the battery terminals, positive first, then negative.

3. Starter Motor Inspection

• Sub-steps:
  1. Locate the starter motor, typically near the engine block.
  2. Remove the wiring harness connected to the starter.
  3. Use a socket set to remove the mounting bolts and detach the starter motor.
  4. Test the starter motor with a bench test; replace if it fails to operate properly.

4. Fuel System Check

• Sub-steps:
  1. Locate the fuel pressure test port on the fuel rail.
  2. Attach a fuel pressure gauge and turn the ignition to the ON position (do not start).
  3. Check that the fuel pressure is within specifications (consult the service manual).
  4. If pressure is low, inspect the fuel pump and fuel filter for blockages or failures.

5. Coolant Temperature Sensor Inspection

• Sub-steps:
  1. Locate the coolant temperature sensor on the engine.
  2. Disconnect the electrical connector and remove the sensor.
  3. Test the sensor’s resistance with a multimeter; compare readings with specifications.
  4. Replace the sensor if it is out of range.

6. Ignition System Check

• Sub-steps:
  1. Remove the spark plugs using a socket wrench.
  2. Inspect the condition of the plugs for wear or fouling; replace as necessary.
  3. Check the ignition coils for proper operation with a multimeter.
  4. Reinstall spark plugs and reconnect the ignition coils.