P0601 Internal Control Module Memory Checksum Error
Description and meaning of DTC p0601
This diagnostic trouble code (DTC) is a generic powertrain code, which means that it applies to OBD-II equipped vehicles. Although generic, the specific repair steps may vary depending on make/model. Basically that means that there is an interal fault in the Powertrain ControlModule (PCM). There have been many reported PCM failures on Chrysler/Dodge productsalthough it is possible for this to happen on any vehicle. In Dodge/Chryslerproducts, a P0601 trouble code means that a serial communication failed insidethe computer at least 6 times. Other internal control module error trouble codes include:P0602 Control Module Programming ErrorP0603 Internal Control Module Keep Alive Memory (KAM) ErrorP0604 Internal Control Module Random Access Memory (RAM) ErrorP0605 Internal Control Module Read Only Memory (ROM) Error
p0601 diagnostic trouble code symptoms
Likely, no symptoms will be discernible to the driver, other than the illuminatedCheck Engine Light. Typically the engine runs fine, gauges work, etc.
DTC p0601 - possible causes
A code P0601 in most cases means the PCM has gone bad. This is possibly dueto a short-circuit inside the PCM. Or, if you disconnect the wires/connectorfrom the PCM while the battery is still connected, that may also cause thiscode.
How to fix OBD-II diagnostic trouble code p0601
With a P0601 OBD-II trouble code, the most common fix is to replace and reprogramthe PCM. In a few cases the dealer may be able to reflash the PCM and get itworking. 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 emmissions warranty. So even if you're out of bumper-to-bumperwarranty or powertrain warranty, check your warranty guide or dealer to seeif this is covered. Other people have reported that they cleared the code only for it to returnagain and again. Keep in mind that most shops can replace the PCM but not allcan program it. Source: DakotaForumsOther PCM / ECM Codes: P0600, P0602, P0603, P0604, P0605, P0606, P0607, P0608, P0609, P0610.