The EOBD/OBDII error code P0601 indicates an “Internal Control Module Memory Check Sum Error.” This essentially means a problem exists within the Powertrain Control Module (PCM), the car’s main computer. While this issue can occur in any vehicle, it has been frequently reported in Chrysler/Dodge products. In these vehicles, a P0601 code signifies a failure in internal serial communication within the PCM at least six times.
What Does a P0601 Code Mean for Your Vehicle?
Often, a P0601 code doesn’t present noticeable driving symptoms beyond the illuminated Check Engine Light. The engine might run smoothly, and gauges typically function normally. However, one reported symptom includes a complete engine shutdown, with electronics remaining functional but the starter unresponsive for a short period. This inability to crank or start the engine can be a direct result of the P0601 code.
Causes of the P0601 Error Code
The most common cause of a P0601 code is a faulty PCM, often due to an internal short circuit. Disconnecting the PCM’s wiring or connector while the battery remains connected can also trigger this error. This action can disrupt the delicate electronics within the module and lead to the memory checksum error.
Solutions for a P0601 Diagnostic Trouble Code
Replacing and reprogramming the PCM is the most frequent solution for a P0601 code. In some instances, a dealership might be able to reflash the PCM to restore functionality. However, replacement and reprogramming are usually necessary. Dealership service is recommended for this procedure to ensure proper installation and programming.
Importantly, this repair might fall under your vehicle’s emissions warranty. Even if your bumper-to-bumper or powertrain warranty has expired, consulting your warranty documentation or a dealership could reveal coverage for this specific issue. The PCM is a critical component of the emissions system, and its failure could impact emissions compliance.
Conclusion: Addressing the P0601 Code
A P0601 code signifies a serious issue within your vehicle’s PCM. While often presenting minimal noticeable symptoms initially, it can lead to significant drivability problems, including complete engine shutdown. Replacing the PCM is the most common solution. Check your vehicle’s warranty as it might cover the necessary repair. Consult a qualified mechanic or dealership for accurate diagnosis and repair to ensure your vehicle’s proper function and your continued safety on the road.
