P0277

Cylinder 6 Injector A Circuit High

Q: Is it safe to drive with P0277?

Short-term yes, but the affected cylinder can misfire, and sustained misfiring can overheat and damage the catalytic converter. Fix it promptly.

Q: Can I just clear P0277?

It returns quickly if the injector circuit fault is still there. Repair the wiring or injector first.

Fuel injection — cylinder 6 Generic OBD-II High

What it means

P0277 means the ECM detected a high-voltage condition — usually an open or a short-to-power — in the cylinder 6 fuel injector control circuit. This is an electrical fault in the injector wiring or coil rather than a fuel-pressure issue, and it typically causes a misfire and rough running on that single cylinder.

High

Can I keep driving? Drivable but not ideal — cylinder 6 may misfire, causing rough running and reduced power. Prolonged misfiring can damage the catalytic converter, so repair it soon.

Real-world scan data

Seen in

112

scans in the past year

Found in

<0.1%

of scans

<0.1%

of scans that found faults

Appears alongside · share of P0277 scans

P0274in 88.4% of scans

P1002in 79.5% of scans

P0206in 78.6% of scans

Figures reflect only diagnostic scans recorded through our own apps and tools. Cars are typically scanned because a symptom or warning light prompted it, so these counts describe our scan records — not the incidence of faults in any model, and not the quality, reliability, or safety of any vehicle. No comparison between manufacturers or models is implied. All trademarks belong to their respective owners; no affiliation or endorsement is implied.

Common symptoms

What you'll notice

Check-engine light on
Rough idle or misfire on cylinder 6
Reduced power and hesitation
Possible increased fuel consumption or fuel smell

Common causes

Most likely first

Open or short-to-voltage in the cylinder 6 injector control wiringLikely
Corroded or loose injector connectorCommon
Failed injector solenoid (open/high-resistance coil)Common
Chafed wiring contacting a power sourceLess often
Faulty ECM injector driver (least likely)Less often

How to diagnose & fix

Work through it in order

Read freeze-frame data and inspect the cylinder 6 injector connector and wiring for an open or short-to-voltage.
Measure the injector coil resistance and compare with the other injectors.
Check the control circuit for continuity and correct voltage.
Replace the injector if its coil is out of spec, or repair the wiring fault.
Clear the code and confirm the misfire and code stay gone on a road test.

FAQ

Quick answers

Is it safe to drive with P0277?+

Short-term yes, but the affected cylinder can misfire, and sustained misfiring can overheat and damage the catalytic converter. Fix it promptly.

Can I just clear P0277?+

It returns quickly if the injector circuit fault is still there. Repair the wiring or injector first.

Read & clear P0277 yourself

Scan your car, confirm the code, and clear it once it's fixed — with OBD DashX on your phone.

▶ Get it on Google Play

✓ Verified name — SAE J2012 / ISO 15031-6Guidance reviewed by OBD DashX