P0277 2016 GMC Sierra Code - Cylinder 6 Injector Control Circuit High Voltage
Quick Answer
The P0277 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates an issue with the Cylinder 6 Injector Control Circuit High Voltage. Common causes include Faulty fuel injector in cylinder 6, Damaged wiring or connectors in the injector control circuit, Malfunctioning ECM. 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
- P0277 2016 GMC Sierra indicates Cylinder 6 Injector Control Circuit High Voltage.
- Common causes
- Common causes include Faulty fuel injector in cylinder 6, Damaged wiring or connectors in the injector control circuit, Malfunctioning ECM.
- 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.
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Code P0277 2016 GMC Sierra Description
The P0277 diagnostic trouble code (DTC) for a 2016 GMC Sierra indicates an issue with the Cylinder 6 Injector Control Circuit High Voltage. This means that the Engine Control Module (ECM) has detected a higher than normal voltage in the control circuit for the fuel injector in cylinder 6. The fuel injector is responsible for delivering the precise amount of fuel into the combustion chamber at the right time. When the voltage in the control circuit is too high, it can lead to improper fuel delivery, affecting the engine's performance and efficiency.
Common Causes of P0277 2016 GMC Sierra
- Faulty fuel injector in cylinder 6
- Damaged wiring or connectors in the injector control circuit
- Malfunctioning ECM
- Issue with the fuel injector driver within the ECM
- Electrical short or open circuit in the injector control circuit
Symptoms of P0277 2016 GMC Sierra
- Rough idling or engine misfires
- Decreased fuel efficiency
- Engine stalling or hesitation
- Check Engine Light illuminated
- Emissions issues or failed emissions tests
How to Fix P0277 2016 GMC Sierra
- Begin by diagnosing the specific cause of the high voltage in the injector control circuit using a scan tool to retrieve freeze frame data and perform a visual inspection of the wiring and connectors.
- Test the fuel injector in cylinder 6 to determine if it is functioning properly or needs replacement.
- Inspect the wiring and connectors in the injector control circuit for any damage or corrosion, repairing or replacing as necessary.
- If the issue lies with the ECM or fuel injector driver, they may need to be replaced or reprogrammed by a professional technician.
- Clear the DTC and test drive the vehicle to ensure the issue has been resolved and the Check Engine Light does not reappear.
Cost to Fix P0277 2016 GMC Sierra
The typical repair costs for addressing a P0277 code on a 2016 GMC Sierra can range from $150 to $500, depending on the specific cause of the issue and the cost of parts and labor. This estimate includes the cost of diagnosing the problem, replacing a faulty fuel injector, repairing damaged wiring or connectors, and potentially reprogramming or replacing the ECM. It's important to note that labor rates at auto repair shops can vary, with hourly rates typically ranging from $80 to $150. Factors such as location, vehicle make and model, and engine type can also impact the overall repair costs. For a more precise estimate, it is recommended to consult with a local auto repair shop.
Tech Notes for P0277 2016 GMC Sierra
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