DTC P0601 Internal Control Module Memory Check Sum Error

DTC P0601 indicates an Internal Control Module Memory Check Sum Error. Understanding the implications, potential causes, observable symptoms, diagnostic procedures, and resolution methods associated with this code is crucial in effectively addressing this issue.

1. What Does P0601 Code Mean?

DTC P0601 denotes an error within the control module’s memory. The Check Sum Error specifically highlights an inconsistency between the calculated and expected values in the module’s memory, suggesting potential corruption or malfunction.

2. What Are the Causes of DTC P0601?

Several factors could lead to the occurrence of this code:

  • Faulty Control Module: A malfunctioning or damaged control module could result in memory errors.
  • Electrical Issues: Voltage fluctuations, power surges, or electrical disruptions might corrupt the module’s memory.
  • Software or Programming Errors: Glitches or errors within the module’s software or programming could cause Check Sum discrepancies.

3. What Are the Symptoms of DTC P0601?

Observable symptoms associated with DTC P0601 may include:

  • Check Engine Light: The illumination of the check engine light or other warning lights indicating a system malfunction.
  • Reduced Performance: The vehicle might experience decreased performance or inefficient operation due to compromised module functions.
  • Unusual Behavior: Erratic behavior or irregularities in vehicle operation might occur intermittently.

4. How to Diagnose DTC P0601?

Systematic diagnostic steps are crucial in identifying the root cause of DTC P0601:

  • OBD-II Scanner: Utilize an OBD-II scanner to retrieve the trouble code and any associated codes for a comprehensive understanding of the issue.
  • Inspect Control Module: Examine the control module for physical damage, loose connections, or signs of water or heat damage.
  • Check Electrical System: Inspect the vehicle’s electrical system for any anomalies that might affect the module’s function or memory.
  • Software Assessment: Evaluate the module’s software or programming for errors or inconsistencies.

5. How to Fix DTC P0601 Problem?

Addressing DTC P0601 necessitates precise measures:

  • Control Module Replacement: If the control module is confirmed faulty, consider replacing it with a new or reprogrammed unit.
  • Repairing Electrical Issues: Rectify any electrical problems that might affect the module’s memory, ensuring stable voltage supply.
  • Reprogramming Software: Update or reprogram the module’s software to resolve any programming errors or glitches.
  • Clearing Error Codes: After repairs or replacements, use the OBD-II scanner to clear the trouble codes and verify if the issue persists.


DTC P0601, an Internal Control Module Memory Check Sum Error, signifies potential memory discrepancies within the vehicle’s control module. Understanding the code’s implications, underlying causes, observable symptoms, systematic diagnostic procedures, and effective resolution methods is vital in successfully addressing and rectifying this issue. Rectifying DTC P0601 ensures optimal module functionality, contributing to the vehicle’s efficient operation and performance.