O2 Sensor Low Voltage (Bank 1 Sensor 2)
The engine computer is seeing a very low signal from the oxygen sensor after the catalytic converter on Bank 1. This usually means the sensor, wiring, exhaust, or exhaust leak is causing the reading problem.
You can often drive short distances, but the problem should be diagnosed soon. Fuel economy and emissions may be affected, and an exhaust leak or wiring issue can get worse.
P0137 means the powertrain control module has detected low voltage from the Bank 1 Sensor 2 oxygen sensor circuit. This sensor is located after the catalytic converter and is used to monitor catalyst efficiency and exhaust oxygen content. A low-voltage condition can be caused by a failed sensor, damaged wiring, a poor connection, or an exhaust leak affecting the sensor reading.
Not usually. P0137 points to a low-voltage problem in the downstream oxygen sensor circuit, though a leak or exhaust issue can affect readings.
Yes. If the sensor signal is wrong, the engine computer may adjust fueling incorrectly and reduce fuel economy.
No. The code will usually come back if the underlying sensor, wiring, or exhaust problem is not repaired.
It is the oxygen sensor after the catalytic converter on the Bank 1 side of the engine.