What does code P0137 mean?
Low voltage detected from the rear oxygen sensor indicating weak signal or lean condition
OBD-II Code
P0137 — Oxygen Sensor Circuit Low Voltage Bank 1 Sensor 2
Low voltage detected from the rear oxygen sensor indicating weak signal or lean condition
Common symptoms
- Irregular fuel consumption
- steady check engine light
Possible causes
- Weak oxygen sensor
- exhaust leak
- ground wiring issue
Initial recommendation
Check exhaust leaks and inspect wiring.
Safety notice
This information is for guidance only and does not replace a physical vehicle inspection or diagnosis by a qualified mechanic. If the vehicle has severe power loss, smoke, a fuel odor, overheating, brake or steering problems, or any unsafe behavior, avoid driving it and seek professional inspection.
Analyze this code with MecaOBD
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