P0601: Internal Control Module Memory Check Sum Error
3 vehicles · 3 makes · $300-$1,500 repair
Most Reported On
P0601 is an OBD-II diagnostic trouble code meaning “Internal Control Module Memory Check Sum Error.” The control module ran an internal self-check (checksum) on its memory and the calculated value did not match the stored value, indicating corrupted or failed internal memory. It is an internal module integrity fault. This code is most commonly reported on 1999-2004 Jeep Grand Cherokee, 2020-2023 Hyundai Creta, and 1997-2002 Chrysler Prowler (Base, Plymouth Prowler, Chrysler Prowler), with repair costs ranging from $300 to $1,500.
Common Causes
Typical Repair Cost
Based on 3 documented vehicle-specific issues. Actual cost depends on root cause and vehicle.
Diagnostic Tools
This is a powertrain code, so a basic OBD-II reader can read it. These read P0601.
ANCEL AD310 Classic OBD-II Scanner
by ANCEL
A simple code reader for engine (P) codes on many compatible OBD-II vehicles. It does not support every vehicle or hybrid/EV application, and it does NOT read body, chassis or network codes; confirm exact-vehicle compatibility before buying.
- Read & clear engine (P) codes
- View freeze frame data
- I/M readiness status
- No batteries or app needed
BlueDriver Pro Bluetooth Scanner
by BlueDriver
Bluetooth scanner with a companion app that reads beyond the engine module — ABS, SRS and transmission — plus manufacturer-specific codes on many vehicles.
- Enhanced diagnostics (ABS, SRS, transmission)
- Repair Reports with verified fixes
- Smog check readiness
- Free app (iOS & Android)
LAUNCH CRP123X V3.0 Elite OBD-II Scanner
by LAUNCH
Handheld scanner covering the four major systems (engine, transmission, ABS, SRS) with live data streaming and graphing.
- Engine, transmission, ABS, SRS diagnostics
- Live data stream & graphing
- AutoVIN for vehicle identification
- Free lifetime updates via Wi-Fi
Autel MaxiCOM MK808S Diagnostic Tool
by Autel
Shop-level tablet with all-system coverage and bi-directional control, so you can command a module rather than only read it.
- All-system diagnostics (25+ modules)
- Bi-directional control & active tests
- Oil reset, EPB, BMS, TPMS, injector coding
- 7-inch touchscreen with Android OS
What you can do yourself, and what needs a shop
Reading the code, clearing it, and watching whether it returns is a driveway job with the right scanner. These steps are not:
- Module programming or software updates — needs the manufacturer software or a J2534 pass-through with a paid subscription.
- Replacing a control module — most are VIN-programmed and immobilizer-registered, so a new one does nothing until it is coded to your car.
- Airbag/SRS component work — a stored fault can deploy a live device.
If the vehicle is still under warranty, check for an open recall or technical service bulletin before buying anything — the repair may already be covered.
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Vehicles Affected (3)
FAQ
What does P0601 mean?
P0601 stands for "Internal Control Module Memory Check Sum Error." The control module ran an internal self-check (checksum) on its memory and the calculated value did not match the stored value, indicating corrupted or failed internal memory. It is an internal module integrity fault.
What are the most common causes of P0601?
The most common causes of P0601 are: Corrupted or failed internal PCM/ECM memory, Faulty/aborted software reflash or programming, Low or unstable battery/system voltage during operation, Corroded PCM ground or power connectors, Defective control module. The specific cause varies by vehicle.
How much does it cost to fix P0601?
Repair costs for P0601 range from $300 to $1,500, depending on the vehicle and root cause.
Which vehicles are affected by P0601?
Au7o has documented P0601 across 3 vehicle models from 3 manufacturers: Chrysler, Hyundai, Jeep.
Sources (9)
- ForumWJ 4.7 Intermittent Stalling Solved (bad PCM) - Jeep Garage
- articleJeep Grand Cherokee 1999-2004: Computer Problems Diagnostic Guide - CherokeeForum
- Forum6-month old Hyundai Creta 1.4 DCT develops powertrain failure (EDIT: Problems continue even after 2 years) — Team-BHP thread #237754
- ForumDCT failure on my 2020 Hyundai Creta SUV — Team-BHP
- ForumDCT on my Creta fails yet again, just a year after Hyundai repaired it — Team-BHP
- articleUsed Hyundai Creta: Top Hidden Costs (DCT replacement ₹80k–1.2L, overheat warnings in traffic) — Cars24
- ForumDCT issues in a brand new 2021 Hyundai Creta 1.4L — Team-BHP
- article6-month old Hyundai Creta 1.4 DCT develops powertrain failure — AutoMotoBuzz
- NHTSANHTSA Manufacturer Communications Data Corpus
Content compiled with AI assistance using NHTSA complaints, TSBs, and owner reports. May contain errors. Always verify with your vehicle's service manual.