Question

2007 Hyundai Accent code P0001, what does this mean? Engine light on and running rough out of the blue

Answer 1

The code 7E9 is not an OBDII code. When the OBDII scanner plugs in your vehicle, the OBDII scanner gets the 7E9 ($7E9) code from the ECM. The code is a menu of systems that the OBDII scanner can access. OBDII scanner interprets the code and displays the menu. Some scanners can't solve these codes and show the codes instead of the interpretation. Clicking on the code menu will read the OBDII codes (e.g. P0420 or P0455), if any, from that system.

Menu Code 7E8 ($7E8): Engine System
Menu Code 7E9 ($7E9): Transmission System
Menu Code 7EA ($7EA): Engine Management

Answer 2

Hi there,

This code points towards a problem with the fuel volume regulator. Here is some info for you.

P0001 - Fuel Volume Regulator Control Circuit/Open

Read more: https://www.autocodes.com/p0001.html