My engine check light came on so I used a diagnostic tool which said mass air flow sensor defective. I replace the mass air flow sensor and the egr valve, disconnected the negative pole on the battery and when all was done I reconnected the negative pole and started the engine.. The light did not go away, so I decided to trouble shoot. I left the engine idling and disconnected the mass airflow sensor, the engine did not stop running, I also disconnected the throttle body sensor and the same happened. Here I am with both sensors disconnected and the engine running with no idea what could be the problem.
may need some help on this one