P2154 OBD II Trouble Code Fuel Injector Group C Circuit High

How to quickly diagnose, repair, and info on symptoms and causes of a P2154 code that means there is a high circuit condition within the C fuel injector group.

Symptoms of P2154 OBD II Trouble Code

  • Erratic engine performance
  • Misfire
  • Fuel economy reduced
  • Erratic idle
  • Excessive smoke
  • Engine noise(s)
  • Lack of power
  • Cannot climb steep hills
  • Reduced throttle response

Common Causes of P2154 OBD II Trouble Code

  • Defective or damaged fuel injector(s)
  • Damaged wiring harness
  • Internal wiring malfunction
  • Internal ECM issue
  • Connector problem

Severity of P2154 OBD II Trouble Code

Pretty severe I would say. In the field, we call a lack of fuel in the mixture being burnt, a "lean" condition. When you engine is running lean, you run the risk of causing extreme engine damage in both the immediate and distant futures. With that in mind, always keep up on your engine's maintenance. There needs to be a certain amount of diligence here, so let's keep our engines running smooth and efficient. After all, they ARE pulling our weight around to transport us on a daily basis.