P0151 Chevrolet 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 Chevrolet 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 Chevrolet 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 Chevrolet?
- 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 Chevrolet?
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 Chevrolet 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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Information for Specific Chevrolet Models
- P0151 2014 Chevrolet Silverado — HO2S Circuit Low Voltage Bank 2 Sensor 1
- P0151 2015 Chevrolet Silverado — HO2S Circuit Low Voltage Bank 2 Sensor 1
- P0151 2016 Chevrolet Silverado — HO2S Circuit Low Voltage Bank 2 Sensor 1
- P0151 2017 Chevrolet Silverado — HO2S Circuit Low Voltage Bank 2 Sensor 1
- P0151 2018 Chevrolet Silverado — HO2S Circuit Low Voltage Bank 2 Sensor 1
Frequently Asked Questions about P0151 Chevrolet Code
1. What does OBDII code P0151 Chevrolet mean?
The code P0151 for Chevrolet indicates a low voltage condition in the HO2S (Heated Oxygen Sensor) circuit of bank 2 sensor 1.
2. What are the common symptoms of a P0151 Chevrolet code?
Common symptoms include poor fuel economy, rough idling, engine misfires, and the illumination of the Check Engine Light.
3. What are the possible causes of a P0151 Chevrolet trouble code?
Possible causes include a faulty oxygen sensor, damaged wiring or connectors in the sensor circuit, exhaust leaks, or issues with the engine's fuel system.
4. How can I diagnose a P0151 Chevrolet code?
Diagnosing the code involves inspecting the oxygen sensor, checking the sensor's wiring and connector, examining the exhaust system for leaks, and testing the fuel system's performance.
5. Can a P0151 Chevrolet code be caused by a bad catalytic converter?
Yes, a failing catalytic converter can sometimes lead to a P0151 code due to affecting the oxygen sensor's readings and performance.
6. How do I repair a P0151 Chevrolet code?
Repair options include replacing the bank 2 sensor 1 oxygen sensor, repairing damaged wiring or connectors, fixing any exhaust leaks, and addressing fuel system issues.
7. Is it safe to continue driving with a P0151 Chevrolet trouble code?
It is generally not recommended to drive for an extended period with a P0151 code, as it can lead to decreased fuel efficiency and potential engine performance issues.
8. How much does it cost to fix a P0151 Chevrolet code?
The cost of fixing a P0151 code can vary depending on the specific issue causing the code, but it typically ranges from $100 to $300 for parts and labor.
9. Can I reset a P0151 Chevrolet trouble code with a simple OBDII scanner?
Yes, you can reset the code using an OBDII scanner, but it's important to address the underlying issue causing the code to prevent it from reoccurring.
10. How often should I replace the oxygen sensors in my Chevrolet vehicle?
Oxygen sensors generally have a lifespan of about 60,000 to 100,000 miles, but it's recommended to follow the manufacturer's guidelines and replace them as needed to maintain optimal engine performance.
Discuss the causes and fixes for P0151 Chevrolet OBDII Code
-
Was getting this P0151 code along with P0131 on my 1997 Chevy K2500 truck and replaced all four O2 sensors and now am still occasionally getting this code.
Should I assume fuel injection problems? Is it ever caused by a faulty PCM? -
Are you getting the same codes? do you have any aftermarket exhaust system?
Bad fuel injector or PCM shouldn't cause that code.
-
Can I get a PO151 code because I live in a high altitude area, I have a 2001 Camaro with a 3.8, Everything seems to run fine, sometime the code will come on then someday it will shut off. I do have a aftermarket exhaust and a K&N air filter.
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It's possible, but not a common problem. Could be that the O2 is about to fail
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