P1137 GMC Code - HO2S Bank 1 Sensor 2 Lean System or Low Voltage
Quick Answer
The P1137 trouble code for GMC vehicles indicates an issue with the HO2S (Heated Oxygen Sensor) Bank 1 Sensor 2, specifically that the system is detecting a lean air/fuel mixture or low voltage from the sensor. Common causes include Faulty HO2S Bank 1 Sensor 2, Vacuum leak in the intake system, Clogged fuel injector. Severity is High - diagnose this code as soon as possible. Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
- What it means
- P1137 GMC indicates HO2S Bank 1 Sensor 2 Lean System or Low Voltage.
- Common causes
- Common causes include Faulty HO2S Bank 1 Sensor 2, Vacuum leak in the intake system, Clogged fuel injector.
- Severity
- High - diagnose this code as soon as possible.
- Can I drive?
- Driving is not recommended if the warning light is flashing, the engine runs poorly, or safety-related symptoms are present.
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Code P1137 GMC Description
The P1137 trouble code for GMC vehicles indicates an issue with the HO2S (Heated Oxygen Sensor) Bank 1 Sensor 2, specifically that the system is detecting a lean air/fuel mixture or low voltage from the sensor. This sensor is responsible for monitoring the oxygen levels in the exhaust gases after they have passed through the catalytic converter. The information provided by this sensor is crucial for the engine control module (ECM) to adjust the air/fuel mixture for optimal combustion.
Common Causes of P1137 GMC
- Faulty HO2S Bank 1 Sensor 2
- Vacuum leak in the intake system
- Clogged fuel injector
- Fuel pressure regulator malfunction
- Wiring or connection issues with the sensor
Symptoms of P1137 GMC
- Decreased fuel efficiency
- Rough idling or stalling
- Engine misfires
- Increased emissions
- Check Engine Light illuminated
How to Fix P1137 GMC
- Use an OBD-II scanner to confirm the P1137 code and determine the exact cause of the issue.
- Inspect the HO2S Bank 1 Sensor 2 and its wiring for any signs of damage or corrosion.
- Test the sensor's voltage output using a multimeter to verify its functionality.
- Replace the oxygen sensor if it is found to be faulty, making sure to install a quality OEM or aftermarket replacement.
- Clear the trouble code and test drive the vehicle to ensure the issue has been resolved.
Cost to Fix P1137 GMC
The typical repair costs for resolving a P1137 code can range from $150 to $400, depending on the specific cause of the issue and the cost of parts and labor in your area. It is advisable to contact local auto repair shops for accurate pricing information, as rates can vary based on location and other factors. Additionally, diagnostic time and labor rates at dealerships or independent shops may also impact the overall cost of the repair.
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