P0056 2017 Chevrolet Silverado Code - HO2S Heater Control Circuit Bank 2 Sensor 2
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 2, Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 2 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
- P0056 2017 Chevrolet Silverado indicates HO2S Heater Control Circuit Bank 2 Sensor 2.
- Common causes
- Common causes include Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2, Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted, Heated Oxygen Sensor Bank 2 Sensor 2 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 P0056 2017 Chevrolet Silverado Description
The Diagnostic Trouble Code (DTC) will be set when the ECM detects an open circuit in the heater output low side driver circuit of the heated oxygen sensor when the heater is commanded OFF for greater than 5 s.
What are the Possible Causes of the DTC P0056 2017 Chevrolet Silverado?
- Faulty Heated Oxygen Sensor (H2OS) Bank 2 Sensor 2
- Heated Oxygen Sensor Bank 2 Sensor 2 harness is open shorted
- Heated Oxygen Sensor Bank 2 Sensor 2 circuit poor electrical connection
- Heated Oxygen Sensor Bank 2 Sensor 2 circuit fuse
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0056 2017 Chevrolet Silverado?
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 P0056 2017 Chevrolet Silverado 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 P0056 2017 Chevrolet Silverado Code
1. What does OBDII code P0056 on a 2017 Chevrolet Silverado mean?
- OBDII code P0056 refers to a fault in the HO2S heater control circuit for Bank 2 Sensor 2.
2. What are the common symptoms of OBDII code P0056 on a 2017 Chevrolet Silverado?
- Common symptoms include poor fuel economy, rough idling, and an illuminated check engine light.
3. What are the possible causes of OBDII code P0056 on a 2017 Chevrolet Silverado?
- Causes can include a faulty oxygen sensor, damaged wiring or connectors, a blown fuse, or issues with the engine control module (ECM).
4. How can I diagnose OBDII code P0056 on my 2017 Chevrolet Silverado?
- Diagnosis typically involves using an OBDII scanner to retrieve the code, inspecting the oxygen sensor and related components, and testing the wiring for continuity.
5. Can I still drive my 2017 Chevrolet Silverado with OBDII code P0056?
- It is generally not recommended to drive with this code present, as it can lead to decreased fuel efficiency and potential damage to the catalytic converter.
6. How do I repair OBDII code P0056 on a 2017 Chevrolet Silverado?
- Repair may involve replacing the Bank 2 Sensor 2 oxygen sensor, repairing damaged wiring, checking and replacing fuses if needed, or addressing any ECM issues.
7. Are there any DIY tips for fixing OBDII code P0056 on a 2017 Chevrolet Silverado?
- While some may attempt to replace the oxygen sensor themselves, it is recommended to consult a professional mechanic for proper diagnosis and repair.
8. Can a faulty HO2S heater cause other issues in my 2017 Chevrolet Silverado besides triggering code P0056?
- Yes, a malfunctioning HO2S heater can lead to poor engine performance, increased emissions, and potential damage to other engine components.
9. How much does it typically cost to repair OBDII code P0056 on a 2017 Chevrolet Silverado?
- Costs can vary depending on the exact cause of the issue, but expect to pay for parts and labor, with the total ranging from a few hundred to over a thousand dollars.
10. Is resetting the check engine light after fixing OBDII code P0056 on a 2017 Chevrolet Silverado necessary?
- Yes, resetting the check engine light is recommended after repairs to ensure the system recognizes that the issue has been addressed.
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