P0601: Internal Control Module Memory Check Sum Error

What Does The P0601 Code 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.

Other internal control module error trouble codes include:

• P0602 – Control Module Programming Error
• P0603 – Internal Control Module Keep Alive Memory (KAM) Error
• P0604 – Internal Control Module Random Access Memory (RAM) Error
• P0605 – Internal Control Module Read Only Memory (ROM) Error

What Are The Symptoms Of The P0601 Code?

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

What Are The Potential Causes Of The P0601 Code?

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.

How Can You Fix The P0601 Code?

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.

Other PCM / ECM Codes: P0600, P0602, P0603, P0604, P0605, P0606, P0607, P0608, P0609, P0610.

Recommended Parts

Below are some recommended auto parts to help you address the trouble code affecting your vehicle and get it running smoothly again:

>>> Twippo 372Pcs Waterproof Wire Connectors Kit
>>> ECU

Note: During the purchasing process, please check carefully whether the part you want to buy fits your car!

Check This Video For Reference

Reference Sources

Diagnostic Chart with Trouble Code for LHD Vehicles for P0601 – Page 167.