P0137 OBD-II Trouble Code: O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)

Our certified mechanics come to you · 12-month, 12,000-mile warranty

SCHEDULE P0137 DIAGNOSTIC Get a fair and transparent estimate upfront
Red-stars EXCELLENT RATING ON

Cost of diagnosing the P0137 code

P0137 is a diagnostic trouble code (DTC) for "O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)". This can happen for multiple reasons and a mechanic needs to diagnose the specific cause for this code to be triggered in your situation. Our certified mobile mechanics can come to your home or office to perform the Check Engine Light diagnostic for $70.00. Once we are able to diagnose the problem, you will be provided with an upfront quote for the recommended fix and receive $30.00 off as a credit towards the repair. All our repairs are backed by our 12-month / 12,000-mile warranty.

Cars Estimate Credit towards follow-up repair Earliest Availability
Ford$70.00$30.00
Toyota$70.00$30.00
BMW$70.00$30.00
SCHEDULE P0137 DIAGNOSTIC Get a fair and transparent estimate upfront

Check Engine Light

P0137 code definition

O2 Sensor Circuit Low Voltage (Bank 1, Sensor 2)

What the P0137 code means

P0137 is the OBD-II generic code indicating the O2 sensor for bank 1 sensor 2 is failing to increase the voltage output above .21 volts indicating excessive oxygen in the exhaust.

This code occurs when the engine control module (ECM) sees the voltage of the O2 sensor for bank 1 sensor 2 below .21 volts when the ECM has commanded the fuel to a targeted rich condition on that bank of the engine.

What causes the P0137 code?

  • The ECM detects the low voltage problem and turns on the Check Engine Light.

  • The ECM uses other O2 sensors to try and control the fuel injection with their values.

  • Exhaust leaks

What are the symptoms of the P0137 code?

  • The engine will run rich during the testing of the sensor for problems.
  • The Check Engine Light will be illuminated.
  • You may have exhaust leaks before or near the O2 sensor in question.

How does a mechanic diagnose the P0137 code?

  • Scans codes and documents freeze frame data then clears codes to verify failure.

  • Monitors O2 sensor data to see if the voltage is switching back and forth between low and high at a fast rate compared to other sensors.

  • Checks the O2 sensor wiring and the harness connections for any corrosion in the connections.

  • Checks the O2 sensor for any physical damage or fluid contamination.

  • Checks for exhaust leaks before the sensor.

  • Follows the manufacturer's specific pinpoint tests for further diagnosis.

Common mistakes when diagnosing the P0137 code?

Follow these simple guidelines to prevent misdiagnosis:

  • Repair any exhaust leaks before the sensor to prevent excess oxygen getting into the exhaust stream causing the low voltage readings.

  • Check the O2 sensor for oil or coolant contaminants that could foul the sensor.

  • Repair any harness that is damaged properly to prevent erratic readings from the sensors.

  • Check the removed O2 sensor for damage from a broken catalyst and replace the catalyst if it has come apart.

How serious is the P0137 code?

  • The voltage output from the O2 sensor may be due to exhaust leaks causing the O2 sensors to give low output voltages.

  • The ECM cannot correctly control the fuel-to-air ratio of the engine fuel mixture if any O2 sensor is malfunctioning. This leads to poor fuel mileage and possible premature failure for some engine components.

What repairs can fix the P0137 code?

Additional comments for consideration regarding the P0137 code

The O2 sensor circuit for bank 1 sensor 2 is used to give a voltage feedback to the ECM showing how much oxygen is in the exhaust stream to help the engine control the fuel-to-air ratio better. The low voltage condition is excessive oxygen in the exhaust or problems causing the issue.

Need help with a P0137 code?

YourMechanic offers certified mobile mechanics who will come to your home or office to diagnose and repair your vehicle. Get a quote and book an appointment online or speak to a service advisor at 1-800-701-6230.

P0137
Check Engine Light
trouble codes

Fast and easy Check Engine Light is on Inspection service at your home or office.

SCHEDULE P0137 DIAGNOSTIC
Get a fair and transparent estimate upfront

Recent Check Engine Light is on Inspection reviews

Excellent Rating


YourMechanic Check Engine Light is on Inspection Service

Average Rating

4.5/5

Number of Reviews

3,901

Rating Summary
3,566
166
43
25
101
3,566
166
43
25
101

Brikk

15 years of experience
299 reviews
Brikk
15 years of experience
Very good one.Arrived on time and explained everthing very clearly.
2000 HONDA ACCORD - CHECK ENGINE LIGHT IS ON - CHARLOTTE, NORTH CAROLINA

Ben

38 years of experience
883 reviews
Ben
38 years of experience
Mr. Smith is extremely professional and his work ethics are impeccable. I cannot that he is Auto Mechanic. Mr Smith left the are that he working in cleaner than I had when he arrived as well I could find or see and fluids or traces of old auto parts. Mr. Smith will be the mechanic requested to service the other 17 vans in our delivery fleet. Thank You, Oscar Basden / Ob Transport
2005 DODGE GRAND CARAVAN - CHECK ENGINE LIGHT IS ON - HUMBLE, TEXAS

James

27 years of experience
349 reviews
James
27 years of experience
Awesome mechanic, very professional and knowledgeable, will definitely be using James again.....he’s my new mechanic for ALL my vehicles
1997 DODGE B3500 - CHECK ENGINE LIGHT IS ON - ORLANDO, FLORIDA

Jose

14 years of experience
433 reviews
Jose
14 years of experience
Jose was fantastic! He checked everything out and let me know the full picture of what was going on with my car. I would have him work on my car again.
2000 TOYOTA COROLLA - CHECK ENGINE LIGHT IS ON - GRESHAM, OREGON

More related articles

Insurance Requirements for Car Registration in Kentucky
The Kentucky Transportation Cabinet requires that all drivers in Kentucky carry liability automotive insurance, or “financial responsibility” in order to operate a vehicle legally and maintain vehicle...
The Traveler’s Guide to Driving in Malaysia
CraigBurrows / Shutterstock.com Malaysia is a popular destination for many tourists today. The country has amazing sights and attractions that you will want to explore....
How to Get a Louisiana Driver's Permit
s licensing program. The first step in this program is to obtain...

Related questions

Q: Trouble running when the engine warms up, dash lights on - 2007 Subaru B9 Tribeca

The P0137/P0157 codes indicate the "rear" (behind the catalytic converters) oxygen sensors are not functioning properly. In turn, they are signaling (incorrectly) for more fuel, which is causing the P0172/P0175 over-rich codes. This is clogging your converters, as well as...

Q: Q: My car is shaking.

Hello. the Diagnostic Trouble Codes would have to be retrieved to begin the diagnosis. Unless the shop retrieved all codes and performed a diagnosis and tested the coils (there are six of them on your engine), what they have told...

Q: 2010 Mini Cooper S - P0974 Trouble Code: Shift Solenoid A Control Circuit High

Hello - there are known issues with the valve body wearing out faster than should be normal on this transmission. I would check with a reputable transmission shop in your area for a rebuilt valve body. these are available with...

How can we help?

Our service team is available 7 days a week, Monday - Friday from 6 AM to 5 PM PST, Saturday - Sunday 7 AM - 4 PM PST.

1-800-701-6230 · hi@yourmechanic.com