P0277 – OBD-II DTC

OBD-II DTC P0277 – Cylinder 6 Injector Circuit Low

DTC P0277 meaning

DTC P0277 refers to a diagnostic trouble code indicating a low voltage condition in the injector circuit for cylinder 6. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various components of the vehicle’s engine and emissions systems. When the Engine Control Module (ECM) detects that the voltage in the injector circuit for cylinder 6 is below the expected threshold, it triggers this code.

DTC P0277 symptoms

Common symptoms associated with DTC P0277 may include:

• Engine misfires
• Rough idling
• Decreased engine performance
• Increased fuel consumption
• Check Engine Light (CEL) illuminated

DTC P0277 causes

Several factors can lead to the triggering of DTC P0277, including:

• Faulty fuel injector for cylinder 6
• Wiring issues, such as damaged or corroded connectors
• Short circuits in the injector circuit
• Faulty Engine Control Module (ECM)
• Low fuel pressure

DTC P0277 seriousness

DTC P0277 can be considered a serious issue as it may lead to engine performance problems. If left unaddressed, it can result in further engine damage, increased emissions, and potential failure to pass emissions tests. It is advisable to diagnose and repair the issue promptly to maintain vehicle performance and compliance with environmental regulations.

How to diagnose DTC P0277

To diagnose DTC P0277, follow these steps:

• Use an OBD-II scanner to confirm the presence of the code.
• Inspect the wiring and connectors for cylinder 6 injector for any visible damage or corrosion.
• Check the resistance of the injector to ensure it is within specifications.
• Test the voltage at the injector connector while the engine is running.
• Perform a fuel pressure test to ensure adequate fuel delivery.
• If necessary, check the ECM for faults or updates.

How to fix DTC P0277 step-by-step instructions

To fix DTC P0277, follow these step-by-step instructions:

1. Confirm the DTC using an OBD-II scanner.
2. Inspect the wiring and connectors for cylinder 6 injector for damage or corrosion.
3. Repair or replace any damaged wiring or connectors.
4. Test the fuel injector for cylinder 6 replace it if it is faulty.
5. Check and adjust the fuel pressure if it is low.
6. Clear the DTC using the OBD-II scanner.
7. Test drive the vehicle to ensure the issue is resolved and the code does not return.

Recommended tools for OBD-II diagnostics

Explore our expert picks: The Best OBD2 Scanners for 2025

Easy-to-use Multimeter for reliable diagnostics: AstroAI Auto-ranging Multimeter

Some of the links on this page may be affiliate links, which means we may earn a small commission if you make a purchase. This helps us keep our DTC database up to date and provide valuable content for free. We only recommend products that we have tested and believe to be the best in their class.