What does fault code p0605 for a 2001 Chrysler Sebring transmission problem indicate is wrong?

A P0605 code on a 2001 Chrysler Sebring (or any vehicle) doesn't directly indicate a transmission problem. Instead, it points to a problem with the Powertrain Control Module (PCM) internal control module itself. The code specifically means there's a PCM processor malfunction.

While the PCM controls many aspects of the vehicle, including the transmission, the problem isn't necessarily *in* the transmission. The issue lies within the PCM's internal circuitry, possibly due to a failing processor, internal memory fault, or a power supply issue. A faulty PCM could lead to erratic transmission behavior *as a symptom*, but the root cause is the PCM itself.