Error code

OBD2 P0279

OBD2P0279
Diagnostic Trouble Code· Standard OBD-II fault code read from the vehicle's onboard diagnostics.

What it means

Cylinder 7 Injector Circuit Low.

Severity

moderateThe vehicle can be driven, but performance issues and potential engine damage may occur if not addressed.

Summary

P0279 indicates a low voltage issue with the fuel injector circuit for cylinder 7 in the powertrain system.

Symptoms

  • Engine knock or detonation
  • Rough engine operation and lack of power, especially during acceleration
  • Reduced fuel economy

Common Causes

  • Faulty or dirty fuel injector in cylinder 7
  • Corroded or loose electrical connectors to the fuel injector circuit
  • Open circuits or short circuits in the wiring harness for the fuel injector
  • Faults in the fuel injection control module (FICM)

Diagnosis

  1. Inspect electrical connectors and wiring for corrosion or looseness.
  2. Use a voltmeter to check for power at the fuel injector.
  3. Listen for clicking sounds from the fuel injector while the engine is running.
  4. Check other related OBD-II codes (P0325, P0301, P0281, P0280) if present.

Fixes

  • Clean or replace the faulty fuel injector in cylinder 7.

FAQ

What should I do if my Check Engine light comes on with P0279?

Inspect the electrical connections and wiring for corrosion or looseness. Use a voltmeter to check power at the fuel injector, listen for clicking sounds while the engine is running, and consider cleaning or replacing the faulty fuel injector.

View source

Not affiliated with OBD2. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.

More OBD2 codes

All OBD2 codes →Search more codes →