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Engine-Codes – GMC – P0283 2018 GMC Sierra

P0283 2018 GMC Sierra Code - Cylinder 8 Injector Control Circuit High Voltage

Quick Answer

The P0283 diagnostic trouble code (DTC) in a 2018 GMC Sierra indicates a problem with the Cylinder 8 Injector Control Circuit High Voltage. Common causes include Faulty fuel injector in cylinder 8, Wiring or connector issues in the injector control circuit, Malfunctioning engine control module (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
P0283 2018 GMC Sierra indicates Cylinder 8 Injector Control Circuit High Voltage.
Common causes
Common causes include Faulty fuel injector in cylinder 8, Wiring or connector issues in the injector control circuit, Malfunctioning engine control module (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.
What is this?
Table of contents Created and updated by William Orellana on Sep 12, 2024
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Code P0283 2018 GMC Sierra Description

The P0283 diagnostic trouble code (DTC) in a 2018 GMC Sierra indicates a problem with the Cylinder 8 Injector Control Circuit High Voltage. This code specifically points to an issue with the fuel injector located in cylinder 8 of the engine. The fuel injector is responsible for delivering the precise amount of fuel into the combustion chamber at the correct time to ensure optimal engine performance. When the control circuit for this injector has a high voltage reading, it means that the injector is likely staying open for longer than necessary, leading to an excessive amount of fuel being injected into the cylinder.

OBDII Code P0283 2018 GMC Sierra - Cylinder 8 Injector Control Circuit High Voltage
P0283 2018 GMC Sierra Code - Cylinder 8 Injector Control Circuit High Voltage

Common Causes of P0283 2018 GMC Sierra

  1. Faulty fuel injector in cylinder 8
  2. Wiring or connector issues in the injector control circuit
  3. Malfunctioning engine control module (ECM)
  4. Fuel injector driver circuit malfunction
  5. Fuel system contamination or blockage

Symptoms of P0283 2018 GMC Sierra

  1. Rough idle or engine misfires
  2. Decreased fuel efficiency
  3. Engine stalling or hesitation
  4. Check Engine Light illuminated
  5. Strong fuel odor from the exhaust

How to Fix P0283 2018 GMC Sierra

  1. Diagnose the issue using a scan tool to confirm the P0283 code and perform further testing to identify the root cause.
  2. Inspect the wiring and connectors associated with the fuel injector in cylinder 8 for any damage or corrosion. Repair or replace as needed.
  3. Test the fuel injector in cylinder 8 for proper operation and resistance. Replace if found to be faulty.
  4. Check the engine control module (ECM) for any stored codes or issues related to the injector control circuit. Repair or replace the ECM if necessary.
  5. Clear the DTC and perform a test drive to verify that the repair successfully resolved the high voltage condition in the cylinder 8 injector control circuit.

Cost to Fix P0283 2018 GMC Sierra

The typical repair costs for addressing a P0283 code in a 2018 GMC Sierra can vary depending on the exact cause of the issue. Parts such as a new fuel injector, wiring harness, or ECM can range from $100 to $500 or more. Labor costs at an auto repair shop can range from $200 to $500 or more, depending on the shop's hourly rates and the complexity of the repair. It's advisable to consult with a trusted mechanic or dealership for a more accurate estimate based on your specific vehicle and location.

What does this mean?

Tech Notes for P0283 2018 GMC Sierra

A clogged or partially clogged fuel injector can cause this code. Start by performing an injector flush before replacing the injector.

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About the author: William Orellana is a Master Mechanic and Mechanical Engineer with over 30 years of experience diagnosing and repairing vehicles. Learn more about his background.

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