P0137 GMC Code - HO2S Circuit Low Voltage Bank 1 Sensor 2
Quick Answer
The P0137 GMC code refers to a malfunction in the HO2S (Heated Oxygen Sensor) circuit for Bank 1 Sensor 2, indicating that the sensor is detecting a low voltage condition. Common causes include Faulty oxygen sensor, Damaged wiring or connectors in the sensor circuit, Issues with the engine control module. Severity is Moderate - service should be scheduled soon. The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
- What it means
- P0137 GMC indicates HO2S Circuit Low Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty oxygen sensor, Damaged wiring or connectors in the sensor circuit, Issues with the engine control module.
- Severity
- Moderate - service should be scheduled soon.
- Can I drive?
- The vehicle may still be drivable for short trips if it runs normally, but avoid hard driving and repair it soon.
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Code P0137 GMC Description
The P0137 GMC code refers to a malfunction in the HO2S (Heated Oxygen Sensor) circuit for Bank 1 Sensor 2, indicating that the sensor is detecting a low voltage condition. This sensor is responsible for monitoring the oxygen levels in the exhaust gases after they have passed through the catalytic converter. The data provided by this sensor is crucial for the engine control module to adjust the air-fuel mixture for optimal combustion.
Common Causes of P0137 GMC
- Faulty oxygen sensor
- Damaged wiring or connectors in the sensor circuit
- Issues with the engine control module
- Exhaust system leaks or damage
- Contaminated fuel affecting sensor readings
Symptoms of P0137 GMC
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Illuminated check engine light
- Increased emissions
How to Fix P0137 GMC
- Use an OBD-II scanner to confirm the P0137 GMC code.
- Inspect the wiring and connectors in the sensor circuit for any damage or corrosion.
- Test the oxygen sensor using a multimeter to check for proper voltage output.
- Replace the oxygen sensor if it is faulty or not providing accurate readings.
- Clear the code with the OBD-II scanner and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P0137 GMC
The typical repair costs for addressing the P0137 GMC code can range from $100 to $300, depending on the cost of the oxygen sensor and the labor rates at the auto repair shop. Additional costs may be incurred if there are other underlying issues contributing to the code. It is recommended to consult with a trusted mechanic to obtain an accurate estimate based on the specific make and model of the vehicle.
Tech Notes for P0137 GMC
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Information for Specific GMC Models
- P0137 2014 GMC Sierra — HO2S Circuit Low Voltage Bank 1 Sensor 2
- P0137 2015 GMC Sierra — HO2S Circuit Low Voltage Bank 1 Sensor 2
- P0137 2016 GMC Sierra — HO2S Circuit Low Voltage Bank 1 Sensor 2
- P0137 2017 GMC Sierra — HO2S Circuit Low Voltage Bank 1 Sensor 2
- P0137 2018 GMC Sierra — HO2S Circuit Low Voltage Bank 1 Sensor 2
Frequently Asked Questions about P0137 GMC Code
What does the OBDII code P0137 mean on a GMC vehicle?
P0137 indicates that the oxygen sensor (HO2S) in Bank 1, Sensor 2, is detecting a consistently low voltage, which suggests an issue with the sensor or the fuel mixture.
What are the symptoms of code P0137 on a GMC?
Symptoms may include the Check Engine Light turning on, reduced fuel efficiency, rough idling, hesitation during acceleration, or a failed emissions test.
What causes the P0137 code to appear on a GMC?
Common causes include a faulty oxygen sensor, damaged wiring or connectors, a vacuum leak, a clogged catalytic converter, or an exhaust leak.
How do I locate Bank 1, Sensor 2 on my GMC?
Bank 1 refers to the side of the engine with cylinder 1, and Sensor 2 is the downstream oxygen sensor located after the catalytic converter.
Can I drive my GMC with the P0137 code active?
While it may be possible to drive with this code active, it is not recommended as it can lead to poor fuel economy, increased emissions, and potential damage to the catalytic converter.
How can I fix the P0137 code on my GMC?
Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring or connectors, fixing exhaust or vacuum leaks, or replacing a clogged catalytic converter.
How can I test the oxygen sensor for P0137 on a GMC?
You can use a multimeter or scan tool to check the voltage readings of the downstream oxygen sensor. A consistent voltage below 0.1 volts suggests a problem.
Is the P0137 code related to the engine’s fuel mixture?
Yes, the code often indicates that the engine is running too lean (not enough fuel) or there is an issue with the oxygen sensor’s ability to measure the air-fuel mixture accurately.
How much does it cost to repair the P0137 code on a GMC?
Repair costs vary, but replacing an oxygen sensor typically costs between $150 and $300, including parts and labor. Additional repairs for wiring or leaks may increase the cost.
Can a bad catalytic converter trigger the P0137 code on a GMC?
Yes, a clogged or failing catalytic converter can cause low oxygen sensor voltage readings and trigger the P0137 code.
Discuss the causes and fixes for P0137 GMC OBDII Code
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