P0155 2017 GMC Sierra Code - HO2S Heater Performance Bank 2 Sensor 1
Quick Answer
Heated Oxygen Sensors (HO2S) are used for fuel control and post catalyst monitoring. Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 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
- P0155 2017 GMC Sierra indicates HO2S Heater Performance Bank 2 Sensor 1.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1, Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 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 P0155 2017 GMC Sierra Description
The Diagnostic Trouble Code (DTC) will be set when the ECM detects that the HO2S 1 heater current is out of factory specifications.
What are the Possible Causes of the DTC P0155 2017 GMC Sierra?
- Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 1
- Heated Oxygen Sensor Bank 2 Sensor 1 harness is open shorted
- Heated Oxygen Sensor Bank 2 Sensor 1 circuit poor electrical connection
- Heated Oxygen Sensor Bank 2 Sensor 1 circuit fuse
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0155 2017 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 P0155 2017 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 P0155 2017 GMC Sierra Code
What does the OBDII code P0155 mean for a 2017 GMC Sierra?
P0155 indicates an issue with the heater circuit of the oxygen sensor located on Bank 2 Sensor 1, which helps the sensor reach operating temperature for accurate readings.
What are the symptoms of code P0155 in a 2017 GMC Sierra?
Common symptoms include a check engine light, reduced fuel efficiency, possible rough idling, and increased exhaust emissions.
What causes the P0155 code in a 2017 GMC Sierra?
Causes can include a faulty oxygen sensor, damaged wiring or connectors in the heater circuit, a blown fuse, or issues with the engine control module (ECM).
How do you diagnose code P0155 on a 2017 GMC Sierra?
Diagnosis involves checking the oxygen sensor’s heater circuit, inspecting wiring and connectors for damage, testing the sensor with a multimeter, and verifying the ECM's functionality.
Can you drive a 2017 GMC Sierra with code P0155?
While the truck may still be driveable, it’s not recommended due to potential fuel inefficiency, increased emissions, and possible long-term damage to other components.
How do you fix the P0155 code on a 2017 GMC Sierra?
Repairs may include replacing the faulty oxygen sensor, repairing damaged wiring or connectors, checking and replacing blown fuses, or updating/replacing the ECM if needed.
How much does it cost to fix the P0155 code on a 2017 GMC Sierra?
Repair costs vary but typically range from $150 to $400, depending on whether you need a new oxygen sensor or additional wiring repairs.
Can a bad oxygen sensor cause other problems in a 2017 GMC Sierra?
Yes, a failing oxygen sensor can lead to poor fuel economy, increased emissions, and potential damage to the catalytic converter over time.
How can you prevent code P0155 on a 2017 GMC Sierra?
Regular maintenance, inspecting wiring for damage, and promptly addressing check engine light issues can help prevent this code.
Does code P0155 affect emissions testing for a 2017 GMC Sierra?
Yes, this code can cause your vehicle to fail emissions testing due to inaccurate readings from the oxygen sensor.
Discuss the causes and fixes for P0155 2017 GMC Sierra OBDII Code
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