P0279 Cylinder 7 Injector Circuit Low

P0279 points to a low injector circuit on cylinder 7. The injector 7 control path is grounded, missing voltage, or below expected current.

Code status

Needs verification

Not yet verified against SAE J2012_202509 / J2012DA. Treat unverified rows as a lookup aid, not repair authority.

System: Injector
Scope: iso-sae-controlled-p0
Standard: SAE J2012 / ISO 15031-6
Source: legacy-import

Diagnostic boundary

A diagnostic trouble code reports that a monitored test failed. It does not prove one specific part is bad, and manufacturer logic can add vehicle-specific conditions.

Do not replace injector 7 before confirming the low circuit path through power feed, wiring, and driver output.

Useful checks before replacing parts

Measure cylinder 7 injector feed, control voltage, resistance, and current while checking for short-to-ground conditions.
Compare cylinder 7 misfire counters, balance, injector pulse, contribution data, and freeze-frame load conditions.
Inspect injector 7 connector terminals, harness routing, shared feed circuits, oil intrusion, moisture, and rubbed insulation.

Related OBD-II codes

These nearby injector entries can help compare wording and fault area. They may share the same verification status as the source database.