P0277 2018 Chevrolet Silverado Code - Cylinder 6 Injector Control Circuit High Voltage
Quick Answer
The Engine Control Module (ECM) supplies voltage to each Fuel Injector on the high control circuits. Common causes include Dirty Fuel Injector 6, Faulty Fuel Injector 6, Plugged Fuel Injector 6. 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 2018 Chevrolet Silverado indicates Cylinder 6 Injector Control Circuit High Voltage.
- Common causes
- Common causes include Dirty Fuel Injector 6, Faulty Fuel Injector 6, Plugged Fuel Injector 6.
- 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 P0277 2018 Chevrolet Silverado Description
What are the Possible Causes of the DTC P0277 2018 Chevrolet Silverado?
- Dirty Fuel Injector 6
- Faulty Fuel Injector 6
- Plugged Fuel Injector 6
- Fuel injector 6 harness is open or shorted
- Fuel injector 6 circuit poor electrical connection
- Faulty Engine Control Module (ECM)
How to Fix the DTC P0277 2018 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 P0277 2018 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.
Need more information about the P0277 2018 Chevrolet Silverado code?
Need more information on how to fix the P0277 2018 Chevrolet Silverado code? Get Access to Factory Service Manuals
Need Help with the Code?
Get the P0277 2018 Chevrolet Silverado code diagnosed by a professional: Find a repair shop in your area
Frequently Asked Questions about P0277 2018 Chevrolet Silverado Code
1. What does OBDII code P0277 mean on a 2018 Chevrolet Silverado?
Code P0277 indicates a "Cylinder 6 Injector Control Circuit High Voltage," meaning the powertrain control module (PCM) has detected unusually high voltage in the injector circuit for cylinder 6.
2. What are the symptoms of code P0277 in a 2018 Chevrolet Silverado?
Common symptoms include rough idling, reduced engine performance, poor fuel economy, misfires, and possibly an illuminated check engine light.
3. What causes code P0277 in a 2018 Chevrolet Silverado?
Possible causes include a faulty fuel injector, damaged wiring or connectors in the injector circuit, a malfunctioning PCM, or electrical issues such as short circuits.
4. Can I drive my 2018 Chevrolet Silverado with code P0277?
Driving with code P0277 is not recommended, as it can lead to decreased engine performance, potential engine damage, and increased emissions.
5. How do I diagnose code P0277 on a 2018 Chevrolet Silverado?
Diagnosis involves inspecting the wiring and connectors for cylinder 6, testing the fuel injector for proper operation, and checking for voltage irregularities using a multimeter or diagnostic scanner.
6. How can I fix code P0277 on my 2018 Chevrolet Silverado?
Repairs may include replacing the cylinder 6 fuel injector, repairing or replacing damaged wiring, cleaning corroded connectors, or reprogramming/replacing the PCM if necessary.
7. How much does it cost to repair code P0277 on a 2018 Chevrolet Silverado?
Repair costs vary, but replacing a fuel injector typically costs $150–$400 (including labor), while wiring repairs could cost $50–$200. PCM replacement can exceed $500.
8. Can a bad PCM cause code P0277 in a 2018 Chevrolet Silverado?
Yes, a malfunctioning PCM can cause code P0277 by failing to regulate the injector circuit voltage properly.
9. Is a special tool needed to fix code P0277 on a 2018 Chevrolet Silverado?
Yes, tools such as a diagnostic scanner, multimeter, and possibly an injector tester may be required for proper diagnosis and repair.
10. Can low fuel pressure trigger code P0277 on a 2018 Chevrolet Silverado?
Low fuel pressure is unlikely to trigger this specific code, as P0277 is related to the electrical circuit of the injector rather than fuel delivery.
Discuss the causes and fixes for P0277 2018 Chevrolet Silverado OBDII Code
Code P0277 2018 Chevrolet Silverado comments
No comments found for this page.
Fix Your Car Smarter
Try the New AutoCodes App!
Get complete OBDII diagnostics, repair solutions, and cost estimates, plus AI chat support on demand.
