Powertrain
Generic/SAE
OBD-II Fault Code
P0274: Cylinder 5 Injector Circuit High
Meaning, symptoms, likely causes, diagnostic checks and repair guidance for P0274.
Fuel system
Use this category to narrow your checks before replacing parts.
High
Severity is a general guide. Confirm with scan-tool data and vehicle symptoms.
What P0274 usually means
Cylinder 5 Injector Circuit High.
Common symptoms
Check Engine light; Poor drivability or reduced fuel economy depending on fault; Hard start, hesitation, stalling or inaccurate fuel reading depending on component
Likely causes
Low fuel pressure; Faulty pump/regulator/sensor; Wiring fault; Clogged filter; Injector fault; High signal voltage; Open ground; Short to voltage; Failed sensor
Diagnostic checks
Scan all modules and record freeze-frame data before clearing codes; Check battery voltage and related fuses; Check fuel pressure and sensor data; Inspect pump/injector fuses, relay, wiring and grounds; Check sensor ground and signal circuit for short to voltage
Repair guidance
Repair wiring/relay issues, replace clogged filter, failed pump/sensor/injector only after testing; Repair ground/signal circuit or replace confirmed faulty sensor
Verification after repair
Clear code, road-test through the same drive condition, then rescan