how to fix the dashboard warning lights on Porsche Cayenne E3 (2018-Present)

Solution

1. Preparation

• Gather tools: OBD-II scanner, multimeter, basic automotive toolset, torque wrench.
• Ensure the vehicle is parked on a level surface and engage the parking brake.
• Disconnect the battery negative terminal to prevent electrical shorts.

2. Address Error Codes

• Connect the OBD-II scanner to the vehicle's diagnostic port.
• Turn the ignition to the "ON" position without starting the engine.
• Clear any error codes and note any persistent codes.
• Investigate the meaning of persistent codes using manufacturer service documentation.

3. Inspect and Repair Battery and Alternator

• Use a multimeter to measure the battery voltage; it should be around 12.6 volts when the vehicle is off and 13.7-14.7 volts when running.
• If the voltage is low, replace the battery or alternator as needed.
• Reconnect the battery.

4. Fluid Level Check

• Open the hood and check the engine oil, coolant, and brake fluid levels.
• Top off any low fluids with the appropriate type (e.g., 5W-40 engine oil, OEM coolant, DOT 4 brake fluid).
• Close the hood securely.

5. Brake System Inspection

• Inspect the brake system for any leaks or worn components, including brake pads and rotors.
• Ensure the brake lights are functioning properly; replace any burnt-out bulbs.
• Check brake sensors for damage and replace as needed.

6. Wiring and Connector Inspection

• Visually inspect wiring harnesses and connectors for wear, corrosion, or disconnection.
• Repair any damaged wiring or secure loose connections.