What does the p2509 diagnostic trouble code mean?
What does the p2509 diagnostic trouble code mean? The P2509 diagnostic trouble code is an indication that the ECM/PCM power input signal is having an intermittent problem. The powertrain control module (PCM/ECM) receives information from several circuits. A contact relay is used to supply voltage to the PCM. What should I do if p2509 comes back? A fix should be implemented methodically, checking and reparing each component as needed. Once you finish each fix, clear the codes and do a test drive, then check if the P2509 code comes back. If it does, go to the next fix. Check the...