What does p001 mean?
What does p001 mean? What the P0001 code means. P0001 is the OBD-II generic code describing an issue with the circuit which runs from your engine computer (ECM) to your fuel pressure regulator on your fuel injection rail on your engine. The ECM regulates your fuel pressure from your fuel pump going to your engine through this circuit. What does the p code mean on a check engine light? Step 2: Determine the meaning of the letter. There are four possible letters that can be displayed in the first section. The letter “P” indicates powertrain-related codes such as those involving...