OBD-II Code · Fuel & Air
P0277
Cylinder 6 Injector Circuit High
Severity
high
Left alone, this one tends to take other parts with it.
Can you drive it
Not for long
Driving on this one risks further damage. Get it to a shop rather than carrying on with it.
Indicative cost (USD)
$50–$560
Varies by vehicle, diagnosis, parts, and local labor. This is not a repair quote.
Cyl 6 injector driver reads open.
How a shop works this
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed.
Note every code that is set, not just this one.
Codes that appear together usually narrow the cause faster than any one of them read alone.
Read the freeze frame — the conditions the fault was recorded under.
Cold or warm, idle or load, road speed and engine speed. A fault that only appears cold is a different fault from one that only appears under load, even with the same code on the scanner.
Confirm the fault is current rather than history.
Clear the code and see whether it returns under those same conditions. A code that does not come back may have been logged during a repair, a flat battery, or a bad connection that has since been disturbed.
Then work the likely-causes list in the order shown.
That order is what a shop checks first for this code — wiring and connections before the component they run to, because a connector costs nothing to inspect and is a common answer.
If the code comes back after a repair, the underlying fault is still there. That is the point to bring in a scanner with live data and freeze-frame, or a shop that has one.
Common symptoms
- Misfire cyl 6
- Check engine light
Likely causes
- Open windingMost common
- Broken trigger wire
Read the full diagnostic procedureP0277 indicates the cyl 6 injector driver circuit is reading high, meaning open circuit, broken winding, or a connector that is not making contact.
P0277 indicates the cyl 6 injector driver circuit is reading high, meaning open circuit, broken winding, or a connector that is not making contact.
Cheapest path
unplug the connector at injector 6, swap with a neighboring injector, and recheck; if the fault follows the injector the winding is open. Ohm the suspect winding: PFI saturated injectors should be 11 to 17 ohms, GDI peak-and-hold solenoids 1.5 to 4 ohms; an open winding reads OL (infinite). With the connector plugged in and engine cranking, scope or noid-test the driver line and expect a clean ground pulse at every other crank revolution; pulse width at warm idle is typically 2.5 to 4.5 ms PFI and 0.3 to 0.6 ms GDI. Caveat: a cracked PCB trace inside the PCM injector driver section can set this code intermittently with no harness fault present, especially on flood-damaged ECUs.
Vehicle-specific patterns2005 to 2009 Mustang GT 4.6L 3V has a recurring chafe point where the harness crosses the rear of the intake; 2003 to 2007 Ford 6.0L Powerstroke is n…
- 2005to 2009 Mustang GT 4.6L 3V has a recurring chafe point where the harness crosses the rear of the intake;
- 2003to 2007 Ford 6.0L Powerstroke is not applicable here since that uses HEUI, but 2008 to 2010 6.4L Powerstroke does see P0277 from cracked solder on injector pigtail under the valve cover, TSB 09-12-7;
- 2007to 2012 Nissan Titan 5.6L VK56DE has a known passenger-bank harness routing that rubs the EGR tube.
Estimated repair$50 to $560.
Look up another code
P0277 — frequently asked
What does a P0277 code mean?
Cyl 6 injector driver reads open.
What causes a P0277 code?
Common causes: Open winding; Broken trigger wire.
What are the symptoms of a P0277 code?
Typical symptoms: Misfire cyl 6; Check engine light.
Is it safe to drive with a P0277 code?
Not for long. Driving on this one risks further damage. Get it to a shop rather than carrying on with it. Estimated repair: $50-$560.
How do I diagnose a P0277 code?
Work from evidence to part, not the other way round. A code names a circuit or a symptom; it does not name the part that failed. 1. Note every code that is set, not just this one. 2. Read the freeze frame — the conditions the fault was recorded under. 3. Confirm the fault is current rather than history. 4. Then work the likely-causes list in the order shown.
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