p0137
Moderate
Mercedes-Benz · SUVs
O2 Sensor Circuit Low Voltage Bank 1 Sensor 2
Quick Answer
Error code P0137 on your Mercedes-Benz SUVs means: O2 Sensor Circuit Low Voltage Bank 1 Sensor 2. This is usually fixable — see the step-by-step guide below.
Affected Models
Applies to all models
X243X247X254V167X167AMG GLB35 4MATIC 2024AMG GLC43 4MATIC 2024AMG GLC63 S 2024AMG GLE53 4MATIC+ 2024AMG GLE63 S 2024AMG GLS63 2024EQB 250+ 2024EQB 300 4MATIC 2024EQB 350 4MATIC 2024GLB250 2024GLB250 4MATIC 2024GLC300 2024GLC300 4MATIC 2024GLE350 4MATIC 2024GLE450 4MATIC 2024GLS450 4MATIC 2024GLS580 4MATIC 2024Maybach GLS600 2024
Likely Causes
How to Fix It
1
Monitor the Bank 1 Sensor 2 O2 voltage with a scan tool under various conditions
2
Inspect the O2 sensor wiring harness and connector for physical damage
3
Check for exhaust leaks around the sensor bung and surrounding pipe joints
4
Test the O2 sensor heater circuit for proper resistance and power supply
5
Replace the downstream O2 sensor if voltage remains fixed at low reading
Pro Tip
This fix requires some technical knowledge. If you're unsure about any step, consider contacting support or a qualified technician.
Parts You May Need
Downstream O2 sensor (Bank 1 Sensor 2)
O2 sensor socket
Anti-seize compound
Wiring repair connectors
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