Pontiac Grand Am theft system issue caused by ignition sensor malfunction leading to fuel cut off on Pontiac Grand Am

Some Pontiac Grand Am owners report experiencing issues with the theft system that causes a fuel cut-off, which is often linked to a malfunction in the ignition sensor. This problem may arise from a faulty passlock sensor in the ignition lock cylinder, leading to a no-start condition as the anti-theft system is erroneously triggered. When the passlock sensor or control module fails, it can activate the anti-theft mode, disabling fuel delivery or ignition even when the correct key is used. To resolve this issue, it is advisable for owners to have the ignition lock cylinder replaced by a qualified technician.