P2628 OBD II Trouble Code O2 Sensor Pumping Current Trim Circuit High Bank 1 Sensor 1

How to quickly diagnose, repair, and info on symptoms and causes of a P2628 code means there is a sensed high circuit in the O2 sensor pumping current trim on B1S1.

Symptoms of P2628 OBD II Trouble Code

  • Poor performance that progresses
  • The engine will run lean
  • The engine will run rich
  • Check Engine Light illuminated
  • Smoke from tailpipe
  • Increased fuel consumption

Common Causes of P2628 OBD II Trouble Code

  • Faulty O2 Sensor
  • Carbon Buildup on O2 Sensor
  • Blown fuse (if applicable)
  • Fuel pressure too high
  • Fuel pressure too low
  • Vacuum leak on the engine
  • Excessive exhaust leak
  • Corroded or damaged connector
  • Faulty or damaged wiring
  • Faulty PCM

Severity of P2628 OBD II Trouble Code

The severity of this code is moderate, but will progress if not corrected in a timely manner. Symptoms of a P2628 trouble code may include: