Diagnostic trouble codes P0125,P0601 - 2004 Dodge Stratus

you probably mean THIS OBD-II code

The P0601 diagnostic trouble code is set when a memory check sum error is detected with the internal control module. This is a error internal to the ECU and is found when the ECU performs self-checks

Diagnostic trouble code (DTC) P0601 stands for "Internal Control Module Memory Checksum Error." It is triggered when the powertrain control module (PCM) detects an internal problem, typically a failed Memory checksum test. The PCM's memory checksum test is performed regularly.Oct 27, 2023

P0601 Code: Internal Control Module Memory Checksum Error

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[PDF]Dodge Motor Company Group Diagnostic Trouble Codes

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P1xxx Manufacturer codes for additional emission system function; not required but reported ... Dodge DTC Codes. 2. P0001 Fuel ... P0030 1/1 02 Sens Heater Relay Malfunction. P0031 HO2S ..... P0601,PCM Internal Ctrller Failure ..... P1599 A/C Press Sens Volts Too Low ... P1684 Battery Disconnected in the last 50 Starts.

Definition of Diagnostic Trouble Code P0601 Category: Powertrain Definition: Internal Control Module Memory Check Sum ErrorNote: This definition of P0601 is applied to all manufacturers

Hi Again,here's another link,to your P0601 code. P0601 OBD II Trouble Code

code P0601 control module ROM malfunction conditions.PCM has to be replaced with new correct software calibration.

I have a 96 Towncar, which had a P0125 trouble code set. I changed the thermostat and cleared the code - only to have it reset in a couple minutes after starting. The car was hard starting, and died several times before it actually ran. I did also noticed that while running the idle speed had risen to over 950 RPM.

I changed the Temperature sending unit located next to the thermostat housing, and again cleared the code. After starting the car again it performed excellently and did not reset the P0125 trouble code.

P0601 ENGINE CONTROL MODULE CHECKSUM ERROR

• The nerve center of the fuel injection system is the engine control module (ECM)
• The ECM constantly supervises the information from various sensors, and regulates the systems that start after vehicle performance.
• The ECM is also empowered to control all the diagnostic functions of the system.
• It can detect operational flaws and caution the driver through the Malfunction Indicator Lamp (MIL)
• It also records and stores a Diagnostic Trouble Code (DTC) which detects the likely problem- making parts to help the technician while repairing.
• In order to house the program information and the calibrations required for engine, trans-axle diagnostics operation an electrically erasable programmable read only memory (EEPROM) is used.
• For detecting errors in the software the ECM uses a specially devised value known as the checksum.
• The checksum (self explanatory) is a value that is the sum total of all the numbers in the software added together.
• If the values recorded by the ECM and the checksum do not match then a checksum error is highlighted.

P0601 - Internal Control Module Memory Check Sum Error

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 emmissions 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: P0602, P0603, P0604, P0605, P0606, P0607, P0608, P0609, P0610.

Hope this help to solve it (remember rated this).

SYMPTOM
P0601-PCM INTERNAL CONTROLLER FAILURE

TEST NOTE
This symptom is diagnosed using the test P0600-PCM FAILURE SPI COMMUNICATIONS.

WHEN MONITORED
Ignition key ON.

SET CONDITION
Internal checksum for software failed, does not match calculated value.

POSSIBLE CAUSES

• PCM internal or SPI