P0151 2016 GMC Sierra Code - HO2S Circuit Low Voltage Bank 2 Sensor 1
Quick Answer
The Heated Oxygen Sensors (HO2S) are used for fuel control and catalyst monitoring. Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 2 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
- P0151 2016 GMC Sierra indicates HO2S Circuit Low Voltage Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty Front Heated Oxygen Sensor Bank 2, Front Heated Oxygen Sensor Bank 2 harness is open or shorted, Front Heated Oxygen Sensor Bank 2 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 P0151 2016 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 P0151 2016 GMC Sierra?
- Faulty Front Heated Oxygen Sensor Bank 2
- Front Heated Oxygen Sensor Bank 2 harness is open or shorted
- Front Heated Oxygen Sensor Bank 2 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 P0151 2016 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
What is the Cost to Diagnose the Code?
Labor: 1.0
To diagnose the P0151 2016 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 P0151 2016 GMC Sierra Code
What does the OBDII code P0151 mean for a 2016 GMC Sierra?
P0151 indicates that the oxygen sensor (HO2S) on Bank 2, Sensor 1 is detecting a voltage that is lower than expected, suggesting a lean fuel condition or sensor malfunction.
What are the common symptoms of the P0151 code on a 2016 GMC Sierra?
Symptoms may include poor fuel economy, rough idle, hesitation during acceleration, or the Check Engine Light being illuminated.
What causes the P0151 code on a 2016 GMC Sierra?
Common causes include a faulty oxygen sensor, damaged wiring, exhaust leaks, or issues with the fuel delivery system, such as low fuel pressure or clogged injectors.
How do I locate Bank 2 Sensor 1 on a 2016 GMC Sierra?
Bank 2 refers to the side of the engine opposite the cylinder with the #1 piston, and Sensor 1 is the upstream oxygen sensor located before the catalytic converter on that side.
Can I drive my 2016 GMC Sierra with the P0151 code?
While the vehicle may still run, driving with this code can lead to reduced performance and fuel efficiency. Prolonged operation may cause further damage, especially to the catalytic converter.
How do you fix the P0151 code on a 2016 GMC Sierra?
Repairs may include replacing the oxygen sensor, repairing damaged wiring, fixing exhaust leaks, or addressing issues with the fuel system.
How do you diagnose the P0151 code on a 2016 GMC Sierra?
Diagnosis involves using a scan tool to monitor sensor data, inspecting wiring and connectors, checking for exhaust leaks, and verifying proper fuel pressure.
What tools are needed to repair the P0151 code on a 2016 GMC Sierra?
You may need an OBDII scanner, basic hand tools, a voltmeter for testing wiring, and potentially replacement parts like an oxygen sensor or wiring harness.
How much does it cost to fix the P0151 code on a 2016 GMC Sierra?
The cost can vary, but replacing an oxygen sensor typically costs $100-$300, plus labor. Wiring repairs or fuel system fixes may increase the price.
Can a P0151 code cause long-term damage to my 2016 GMC Sierra?
If unaddressed, P0151 can lead to poor engine performance and potentially damage the catalytic converter, which is costly to replace.
Discuss the causes and fixes for P0151 2016 GMC Sierra OBDII Code
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