P0300 Fault in 1996 Chrysler Sebring LXi: Misfire Not Present, Brake Light Switch or PCM Issue?

Hi everyone, I recently encountered a P0300 diagnostic code on my 1996 Chrysler Sebring LXi. After consulting with Kirkland Chrysler Jeep, I learned that the P0300 code was not indicative of actual engine misfiring in this vehicle. The code triggered when the engine was running at idle with no load. According to a Chrysler service bulletin, such cases may require updating the powertrain control module (PCM) or checking and replacing the brake light switch. A faulty brake light switch or a defective PCM can falsely trigger the P0300 code. I performed both actions: updated the PCM software and tested the brake light switch, which was found to be functioning correctly. After these steps, the code cleared and no further issues have been observed. This case highlights an important consideration—when a P0300 code appears but there is no detectable misfire, it's essential to investigate potential sensor or module faults rather than assume engine performance problems. I'm unsure whether this service bulletin applies only to the Sebring or to all Chrysler V6 models. This information may be helpful for others experiencing similar issues with P0300 on non-misfiring engines.