P0601: owner reports and bulletins

Powertrain (generic, all makes). We haven't written the explanation for this code yet. Below is what owners and manufacturers have filed with NHTSA.

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What owners report to NHTSA

18 complaints filed with NHTSA mention P0601, 8 of them since 2015, across 15 different models. The component owners most often filed it under: electrical system.

Most-reported models

VehicleComplaintsModel years reported
CHEVROLET IMPALA32009

Manufacturer service bulletins that name P0601

22 technical service bulletins and manufacturer communications filed with NHTSA mention P0601, from 10 makes. A bulletin means the manufacturer has documented a known cause or a fix procedure for that model. Examples:

  • RAM PROMASTER (2022), bulletin 10223799: Flash: Powertrain Control Module (PCM) Updates This bulletin involves reprogramming the PCM with the latest available software. Customers may experience a Malfunction Indicator Lamp (MIL) illumination. Upon further inves…
  • GMC ENVOY (2007, 2008, 2009, 2010), bulletin 10113571: This informational bulletin communicates Information to technicians on control module Diagnostic Trouble Code(s) (DTC)(s) P0601, P0602, P0603, P0604, P0606, P062F, P06F3, P1621 which can be shared in multiple modules.
  • BUICK ENCLAVE (2008, 2009, 2010, 2011), bulletin 10113571: This informational bulletin communicates Information to technicians on control module Diagnostic Trouble Code(s) (DTC)(s) P0601, P0602, P0603, P0604, P0606, P062F, P06F3, P1621 which can be shared in multiple modules.
  • CADILLAC ATS (2013, 2014, 2015, 2007), bulletin 10113571: This informational bulletin communicates Information to technicians on control module Diagnostic Trouble Code(s) (DTC)(s) P0601, P0602, P0603, P0604, P0606, P062F, P06F3, P1621 which can be shared in multiple modules.
  • CHEVROLET AVALANCHE (2007, 2008, 2009, 2010), bulletin 10113571: This informational bulletin communicates Information to technicians on control module Diagnostic Trouble Code(s) (DTC)(s) P0601, P0602, P0603, P0604, P0606, P062F, P06F3, P1621 which can be shared in multiple modules.
  • GMC ACADIA (2007, 2008, 2009, 2010), bulletin 10125933: This Preliminary Information communication provides information to the technician about vehicle that have a Malfunction Indicator Lamp on. Technician may find Diagnostic Trouble Codes P0601, P0603, P0604, P062F or P1621 …

Sources: NHTSA Office of Defects Investigation complaint database and manufacturer communications file, snapshots September 2026. A complaint or bulletin that mentions a code is a report about that vehicle, not a statement that the code has one cause.