P2146 — Fuel Injector Group A Supply Voltage Circuit/Open

P2146: Fuel Injector Group A Supply Voltage Circuit/Open — what it means, the affected system and what to check before replacing parts.

Meaning, symptoms, causes and checks

Fuel Injector Group A Supply Voltage Circuit/Open. Basic catalogue definition; diagnostic details have not yet been reviewed.

Affected system: Powertrain

Symptoms

  • A warning lamp may accompany rough running or loss of engine power.
  • An electrical fault in an injector group can contribute to misfires or stalling.

Possible causes

  • Broken group-A supply wiring, a poor injector connector or a relevant failed fuse.
  • Electrical failure of an injector or its driver circuit; controller failure is considered only after other checks.

What to check

  • Scan related injector and electrical-supply codes, then identify injector group A in the vehicle documentation.
  • Inspect injector harnesses, plugs and relevant fuses for damage or interruptions.
  • Verify group supply and wiring using the manufacturer's test procedure; do not assume a universal pinout.
  • Have a qualified technician test individual injectors and the driver circuit before replacing components.

Also written as: P2146-00, P214600 (some scan tools add the fault-type byte, e.g. -00).