P0137 2014 GMC Sierra Code - HO2S Circuit Low Voltage Bank 1 Sensor 2
Quick Answer
The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection. 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 2014 GMC Sierra indicates HO2S Circuit Low Voltage Bank 1 Sensor 2.
- Common causes
- Common causes include Faulty Rear Heated Oxygen Sensor Bank 1, Rear Heated Oxygen Sensor Bank 1 harness is open or shorted, Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection.
- 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.
Code P0137 2014 GMC Sierra Description
The heating elements inside each HO2S heat the sensor to bring the sensor up to operating conditions faster. This allows the system to enter Closed Loop earlier and the ECM to calculate the air-to-fuel ratio sooner.
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the heated oxygen sensor is shorted to ground if the HO2S voltage is less than 50 mV.
What are the Possible Causes of the DTC P0137 2014 GMC Sierra?
- Faulty Rear Heated Oxygen Sensor Bank 1
- Rear Heated Oxygen Sensor Bank 1 harness is open or shorted
- Rear Heated Oxygen Sensor Bank 1 circuit poor electrical connection
- Low or high fuel system pressure
- Fuel contamination
- Faulty fuel injectors
- Exhaust gas leaks
- Engine vacuum leaks
How to Fix the DTC P0137 2014 GMC Sierra?
Review the 'Possible Causes' above and visually examine the corresponding wiring harness and connectors. Check for damaged components and inspect connector pins for signs of being broken, bent, pushed out, or corroded.
Code Tech Notes
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What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0137 2014 GMC Sierra code, it typically requires 1.0 hour of labor. Rates vary by location, vehicle, and shop. Many shops charge between $80–$150 per hour; dealerships and metro areas may be higher, independents may be lower.
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Frequently Asked Questions about P0137 2014 GMC Sierra Code
1. What does the OBDII code P0137 mean on a 2014 GMC Sierra?
P0137 indicates low voltage in the HO2S (Heated Oxygen Sensor) circuit for Bank 1 Sensor 2, meaning the sensor is reporting lower-than-expected voltage.
2. What are the common symptoms of code P0137 in a 2014 GMC Sierra?
Symptoms may include the Check Engine Light turning on, reduced fuel efficiency, poor engine performance, or a failed emissions test.
3. Which sensor does P0137 refer to on my 2014 GMC Sierra?
P0137 refers to the downstream oxygen sensor (Sensor 2) on Bank 1, which monitors the catalytic converter's efficiency.
4. What causes the P0137 code on a 2014 GMC Sierra?
Common causes include a faulty oxygen sensor, damaged wiring or connectors, exhaust leaks, or a malfunctioning catalytic converter.
5. Can a dirty or clogged catalytic converter trigger the P0137 code?
Yes, a clogged or failing catalytic converter can cause incorrect readings from the downstream oxygen sensor, triggering P0137.
6. How do I diagnose the P0137 code on my 2014 GMC Sierra?
Start by inspecting the oxygen sensor and its wiring for damage, check for exhaust leaks, and use a multimeter to measure sensor voltage.
7. Can I drive my 2014 GMC Sierra with the P0137 code?
While it may be safe to drive short-term, ignoring the issue can lead to reduced fuel efficiency and potential damage to the catalytic converter.
8. How do I fix the P0137 code on a 2014 GMC Sierra?
Repairs may include replacing the oxygen sensor, repairing wiring, fixing exhaust leaks, or replacing a failing catalytic converter.
9. How much does it cost to fix the P0137 code on a 2014 GMC Sierra?
Replacing the oxygen sensor typically costs $200–$400, while addressing wiring or exhaust issues may vary depending on the extent of the damage.
10. Will clearing the P0137 code with a scan tool fix the problem permanently?
No, clearing the code will remove it temporarily, but the underlying issue must be repaired to prevent the code from returning.
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