how to fix P0134 code in BMW X5 G05 (2019-2024)

Solution

1. Preparation

• Gather necessary tools and parts.
• Park the vehicle on a level surface and engage the parking brake.
• Disconnect the negative battery terminal to prevent electrical shorts.

2. Inspect and Repair Wiring

• Tools Required: Wire stripper, soldering iron, electrical tape or heat shrink tubing.
• Inspect the wiring harness connected to the Bank 1 Sensor 1 oxygen sensor.
  • Look for frayed wires, loose connections, or corrosion.
  • Repair any damaged wiring by cutting out the affected section and splicing in new wire.
  • Use solder and heat shrink tubing to ensure a good connection, then wrap with electrical tape.

3. Replace Oxygen Sensor (if necessary)

• Tools Required: Oxygen sensor socket, ratchet and extension.
• If the sensor output is not within specifications or if the sensor is damaged, proceed with replacement.
  • Locate Bank 1 Sensor 1 oxygen sensor (usually before the catalytic converter).
  • Disconnect the electrical connector.
  • Use the oxygen sensor socket to unscrew the sensor from the exhaust pipe.
  • Apply anti-seize compound to the threads of the new sensor and install it securely.
  • Reconnect the electrical connector.

4. Reset the ECM

• Reconnect the negative battery terminal.
• Use the OBD-II scanner to clear any fault codes from the ECM.

5. Test Drive

• Perform a test drive to ensure that the vehicle operates smoothly and that the check engine light does not reappear.