my Genesis G70 IG (2017-2023) has a check engine light and P0138 code

• •Check engine light illuminated
• •Poor fuel economy
• •Rough idle
• •Increased emissions
• •Engine stalling at low speeds

1. 1Use an OBD-II scanner to confirm the P0138 code and check for any additional error codes.
2. 2Inspect the wiring and connectors leading to the upstream oxygen sensor for any visible damage or corrosion.
3. 3Check the oxygen sensor signal voltage using a multimeter to confirm it is high (above 0.9 volts).
4. 4Inspect the vehicle's exhaust system for leaks that could affect sensor readings.
5. 5Verify the engine's fuel trim values to see if they are outside the normal range, indicating a rich condition.
6. 6Clear the codes and conduct a test drive to see if the P0138 code returns.

After completing the repair, verify that the issue has been resolved:

• ✓Test the affected component to ensure it functions correctly
• ✓Check for any error codes or warning lights
• ✓Monitor the vehicle for a few days to ensure the issue does not recur

To prevent this issue from occurring again:

• •Follow the manufacturer's recommended maintenance schedule
• •Address warning signs early before they develop into major issues
• •Use quality parts and fluids recommended for your vehicle
• •Keep detailed records of all repairs and maintenance

• •OBD-II scanner
• •Oxygen sensor socket
• •Multimeter
• •Torque wrench
• •Electrical contact cleaner

• •New upstream oxygen sensor