The meaningful engine P2623 Code contains information about the car engine problem. The PCM has noticed an irregular reading from the injector control density regulator circuit. If this code is present, the driver should shut the engine off nearly! Catastrophic engine failure could result if this condition is not rectified at once. This type of code is incomplete wholly to diesel powered applications. If this code is exhibited in your car hybrid, gas or electric vehicle suspect a defective PCM. You should not try to check the car engine or solve the car engine if you do not know how to check the car engine or solve it.