P0059 GMC Code - HO2S Heater Resistance 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 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
- P0059 GMC indicates HO2S Heater Resistance 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
- 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.
Code P0059 GMC Description
The Diagnostic Trouble Code (DTC) will be set when the ECM detects the HO2S heater is not within a specified resistance range at engine start-up.
What are the Possible Causes of the DTC P0059 GMC?
- 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 P0059 GMC?
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 P0059 GMC 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 GMC Models
- P0059 2014 GMC Sierra — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 2015 GMC Sierra — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 2016 GMC Sierra — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 2017 GMC Sierra — HO2S Heater Resistance Bank 2 Sensor 1
- P0059 2018 GMC Sierra — HO2S Heater Resistance Bank 2 Sensor 1
Frequently Asked Questions about P0059 GMC Code
1. What does the OBDII code P0059 for a GMC mean?
This code indicates a malfunction in the HO2S (Heated Oxygen Sensor) heater circuit for Bank 2 Sensor 1.
2. What are the common symptoms of a P0059 error code?
Common symptoms include poor fuel economy, rough idling, stalling, and illuminated Check Engine Light.
3. What can cause the P0059 code to trigger in a GMC vehicle?
Possible causes include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the vehicle's computer system.
4. How can I diagnose the source of a P0059 trouble code?
Using a scan tool to retrieve the code and inspecting the oxygen sensor, wiring, and related components can help pinpoint the issue.
5. Can I continue driving with a P0059 error code present?
It is not recommended to drive for an extended period with this code as it can lead to poor engine performance and potential damage over time.
6. What is the typical repair for a P0059 GMC error code?
Repair usually involves replacing the faulty oxygen sensor, repairing damaged wiring, or addressing any other issues causing the heater circuit malfunction.
7. Are there any DIY repair tips for fixing a P0059 code?
While some may attempt to replace the oxygen sensor themselves, it's best to consult a professional to ensure proper diagnosis and repair.
8. Is it necessary to reset the error code after making repairs for P0059?
Yes, clearing the code with a scan tool after repairs allows the vehicle's computer to monitor the system for any recurring issues.
9. How much does it cost to fix a P0059 error in a GMC vehicle?
Costs can vary depending on the exact cause of the issue, but it typically ranges from $200 to $400 for parts and labor.
10. Can a P0059 error code be prevented in the future?
Regular maintenance and timely replacement of oxygen sensors can help prevent issues like the P0059 code from occurring in the future.
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