P02B4 OBD II Trouble Code Cylinder 7 Injector Restricted

How to quickly diagnose, repair, and info on symptoms and causes of a P02B4 code which indicates a restricted fuel injector on cylinder number 7.

Symptoms of P02B4 OBD II Trouble Code

  • Diminished engine performance
  • Reduced fuel efficiency
  • Lean exhaust codes
  • Misfire codes may also be stored

Common Causes of P02B4 OBD II Trouble Code

  • Defective and/or clogged fuel injector
  • Open or shorted fuel injector circuit(s)
  • Faulty oxygen sensor(s)
  • PCM or programming error
  • Mass air flow (MAF) or Manifold Air Pressure (MAP) sensor failure

Severity of P02B4 OBD II Trouble Code

A P02B4 should be classified as severe because a lean fuel condition could cause cylinder head or engine damage.