2004 Chrysler Sebring missing while cruising

Another explanation

P0601 OBD-II Trouble Code Technical Description
Internal Control Module Memory Check Sum Error

What does that mean?

Basically that means that there is an interal fault in the Powertrain Control Module (PCM). There have been many reported PCM failures on Chrysler/Dodge products although it is possible for this to happen on any vehicle. In Dodge/Chrysler products, a P0601 trouble code means that a serial communication failed inside the computer at least 6 times.

Symptoms

Likely, no symptoms will be discernible to the driver, other than the illuminated Check Engine Light. Typically the engine runs fine, gauges work, etc.

Causes

A code P0601 in most cases means the PCM has gone bad. This is possibly due to a short-circuit inside the PCM. Or, if you disconnect the wires/connector from the PCM while the battery is still connected, that may also cause this code.

Possible Solutions

With a P0601 OBD-II trouble code, the most common fix is to replace and reprogram the PCM. In a few cases the dealer may be able to reflash the PCM and get it working. But more than likely the PCM will need to be replaced and reprogrammed (we recommend you take it to a dealership for this). The good news is it *may* be covered under your emissions warranty. So even if you're out of bumper-to-bumper warranty or powertrain warranty, check your warranty guide or dealer to see if this is covered.

Other people have reported that they cleared the code only for it to return again and again. Keep in mind that most shops can replace the PCM but not all can program it.

[quote]updated 2/2/09
THANKS FOR YOUR REPLY. SINCE THE PCM FAILURE WOULD MOST LIKELY NOT BE THE CAUSE 0F THE ENGINE FAILING (SPEEDOMETER AND TACH HANDS DROPS DOWN AND CRUISE CONTROL LIGHT TEMPORARILY COMES ON) WHILE CRUISING, WHAT WOULD BE THE LIKELY CAUSE(s)?[Quote]

At the moment that the PCM receives the invalid signal (P0601), every PCM functions shut down momentarily while the PCM "reboots". While the PCM reboots, you feel the engine stalls, and catches back up once the PCM comes back on. The good thing about PCM reboots is that it only takes second or two, unlike your home computer which will take a minute or two.

It can be very frustrating to have your PCM reboots in the middle of trips. Unfortunately, once there is an internal failure in the PCM, you will notice the problem will be intermittent in the beginning and will become more commonplace as time goes by. There will be one point in time that, sad to say, your vehicle will quit on you.

There is no TSB for P0601 other than a visit back to your Chrysler dealership and have your PCM either reflashed or replaced (if the corrupted PCM cannot be re-programmed). I am not sure as to the cost of a remanufactured PCM from the dealership. Here is a site that an acquaintance had purchase his PCM from. There is a caveat though, do this at your own risk. Autotechmicro. Com, just add www. In the beginning.