Chevrolet P1601: PCM Serial Communications Malfunction

Is your scanner showing Chevrolet P1601?
No worries. We'll show you what it means and how to deal with it.

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OBDCodex, Editor

Chevrolet P1601: PCM Serial Communications Malfunction

DIY Difficulty Level
Repair Cost
Can I Still Drive?
Yes (Short-term only)

What Does The Chevrolet P1601 Code Mean?

Key on, and the PCM did not receive 25 valid responses from the IPC system, condition met for 5-10 seconds during the CCM test.

What Are The Potential Causes Of The Chevrolet P1601 Code?

  • Inspect the serial data line for an open or shorted condition
  • Determine if the BCM (module) is pulling the data line down
  • Determine if the EBCM (module) is pulling the data line down
  • TSB 61-65-67 contains a repair procedure for this code

Recommended Parts

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

>>> WORKPRO 582-piece Crimp Terminals, Wire Connectors, Heat Shrink Tube, Electrical Repair Kit
>>> ACDelco GM Original Equipment 20896914 Electronic Brake and Traction Control Module with 4 Bolts
>>> GM Genuine Parts 22860591 Body Control Module

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

Reference Sources

GM, 2013, Service Bullettin – Prior To Any Circuit Testing.

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