what does P0302 code mean for Porsche Cayenne E3 (2018-Present)

Learn how to diagnose and fix P0302 cylinder 2 misfire in Porsche Cayenne E3. Step-by-step guide with diagnostic procedures and repair instructions.

Solution

1. Preparation

• Gather necessary tools and parts.
• Disconnect the battery to prevent electrical shorts.

2. Inspect and Replace Spark Plugs

• Sub-steps:
  1. Remove the engine cover if applicable, using the appropriate socket.
  2. Disconnect the ignition coil connector for cylinder 2.
  3. Remove the ignition coil using a socket wrench.
  4. Extract the spark plug using a spark plug socket.
  5. Inspect the spark plug for wear; replace if necessary with OEM specifications (typically NGK or Bosch).
  6. Reinstall the new spark plug and torque to manufacturer specifications (usually around 20 Nm).
  7. Reattach the ignition coil and its connector.

3. Check and Replace Ignition Coil

• Sub-steps:
  1. If the spark plug is in good condition, inspect the ignition coil for any cracks or signs of damage.
  2. Replace the ignition coil with a new one if defects are found.
  3. Ensure proper seating and torque (around 7 Nm) before reattaching the connector.

4. Inspect Fuel Injector

• Sub-steps:
  1. Disconnect the fuel injector connector for cylinder 2.
  2. Remove the fuel rail and inspect the injector.
  3. Test the fuel injector with a multimeter to ensure it receives proper voltage and resistance.
  4. Replace the injector if it is faulty, ensuring to use OEM parts.

5. Test Engine Compression

• Sub-steps:
  1. Remove the spark plugs from all cylinders for accurate compression testing.
  2. Insert a compression gauge into cylinder 2.
  3. Crank the engine and record the compression reading; it should be within manufacturer specifications (usually around 130-200 psi).
  4. If compression is low, further investigation of internal engine components may be necessary.

6. Reassemble and Clear Codes

• Sub-steps:
  1. Reinstall the engine cover if removed.
  2. Reconnect the battery.
  3. Use the OBD-II scanner to clear the fault codes.