P0294 Cylinder 12 Injector Circuit Low

P0294 indicates a low injector circuit on cylinder 12. The injector 12 electrical 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 12 before tracing the low circuit through wiring and driver control.

Useful checks before replacing parts

Measure injector 12 feed voltage, control command, resistance, and current while checking for short-to-ground faults.
Compare cylinder 12 misfire counters, contribution data, injector pulse, fuel trims, and freeze-frame operating conditions.
Inspect connector terminals, harness routing to cylinder 12, shared injector feed, moisture, oil intrusion, 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.