Fault code P0137 is called “Oxygen O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)” but in different programs it may be called differently. This fault designation applies to all vehicles equipped with OBD-II.
Technical description and explained code P0137
This Diagnostic Trouble Code (DTC) is a generic powertrain code. Error P0137 is considered a general code because it applies to all makes and models of vehicles. Although the specific repair steps may vary slightly depending on the model.
Diagnostic code P0137 refers to the second oxygen sensor (O₂), located on Bank 1, after the catalytic converter. This sensor measures the amount of oxygen entering the exhaust gases.
It plays an important role in the control circuit, which constantly checks the correctness of the fuel-air mixture. It sends a signal that is used to support fuel feedback.
The meaning of this code is that the O₂ (oxygen sensor) voltage has been low for more than 2 minutes. This is perceived by the engine control module (ECM) as a low voltage condition and consequently error code P0137 OBD2 is set.
Symptoms of vehicle malfunctions
The main signal that an error P0137 has occurred is the Malfunction Indicator Lamp (MIL) is also known as the CheckEngine Light.
It can also be warning signs such as:
- Check engine indicator light on the control panel is on.
- Increased fuel consumption.
- Excessive smoke from the exhaust pipe.
Fault P0137 may indicate a failure of the oxygen sensor, so the ECM will not be able to adjust the air-fuel mixture ratio normally. This may result in increased fuel consumption, as well as problems with the vehicle’s engine and exhaust system performance.
Factors that can cause this error code
The error code P0137 can mean that one or more of the following problems have occurred:
- The oxygen sensor O₂ may be defective.
- There may be a voltage short circuit in the oxygen sensor signal circuit O₂.
- High resistance or open circuit in the oxygen sensor signal circuit O₂.
How to fix or reset OBD-2 code P0137
Some suggested steps for troubleshooting and fix the error code P0137:
- Replace the faulty sensor.
- Eliminate short circuit, open circuit or high resistance in the signal circuit O₂.
Diagnose and repair of problems
It is necessary to read out all saved data and error codes with an OBD-II scanner. Clear the error codes from the computer memory and test-drive the vehicle. To find out if code P0137 appears again.
To check the oxygen sensor voltage in real time using a scan tool. To find out if the sensor is working properly. Inspect the oxygen sensor electrical wires and connector for corrosion and damage.
Inspect the oxygen sensor for fluid contamination and damage. Test the exhaust system for exhaust gas leaks, repairing any leaks present if necessary.
On which vehicles does this problem occur most frequently
Fault code P0137 can occur on different vehicles but there are statistics on which brands this occurs most often. Here is a list of some of them:
- Buick (Parck Avenue)
- Cadillac
- Chevrolet (Aveo, Camaro, Cruze, Impala, Lanos, Silverado)
- Chrysler
- Citroen (Berlingo)
- Daewoo (Gentra, Nexia)
- Dodge (Caravan, Charger, Stratus)
- Ford (Focus)
- Geely (MK)
- Great Wall
- Honda (CR-V)
- Hover
- Hyundai
- Kia (Sportage)
- Land Rover (Range Rover)
- Lexus
- Lifan (Solano)
- Mazda
- Mercedes-Benz
- Mitsubishi (ASX, Galant, Lancer, Outlander)
- Nissan (Juke, Teana)
- Opel (Astra, Corsa)
- Peugeot (206)
- Renault (Duster)
- Saab
- Skoda (Octavia)
- Subaru (Forester, Outback)
- Suzuki
- Toyota (Camry, Prado, Prius, RAV4)
- Volkswagen (Jetta, Polo)
- Volvo
- LADA (Kalina)
- VAZ
Fault code P0137 can sometimes be found with other errors. The most common are the following: P0131, P0134, P0136, P0138, P0139, P0141, P0157, P0171, P0174, P0175, P0300, P0336, P0480, P0742, P2096, P2270, C1500.
