Cylinder 6 Injector Circuit Low
The engine computer detected that cylinder 6's fuel injector isn't receiving enough electrical current to open properly. Think of it like a door that won't unlock because the electrical signal is too weak.
The ECU monitors the voltage and current supplied to the cylinder 6 injector during activation. It measures the injector's response time and coil resistance to ensure adequate electrical flow. If voltage drops below threshold or resistance is too high, the fault code triggers.
| Parameter | Normal Range | Fault Condition |
|---|---|---|
| Injector Supply Voltage | 12-14V during operation | Below 10V or sporadic dropout |
| Injector Coil Resistance | 12-16 ohms | Above 20 ohms or open circuit |
Code P0277 is a moderate fault. You can generally drive to a workshop, but avoid long trips or high-load driving (motorway, uphill towing) until it is diagnosed. If the code keeps returning after clearing, or if you notice the symptoms listed above worsening, do not delay professional diagnosis. Many moderate codes have multiple possible root causes — a mechanic with live OBD data can identify the exact fault more efficiently than part-by-part trial and error.
Once the fault is repaired, P0277 can be cleared using any OBD-II scanner. Connect the scanner, navigate to "Clear Codes" or "Erase DTCs," and confirm. The check engine light turns off immediately.
The code will return if the root cause was not actually fixed. The ECM re-detects the fault within 1–3 drive cycles and sets the code again.