Powertrain, generic · Computer and auxiliary outputs

P06AF Torque Management System Forced Engine Shutdown

Check engine lightOn
EmissionsRelevant
Drive cycleNot required
Limp modePossible

GM uses P06AF for a cross-check between two control modules: the monitored module (engine or transmission module, each with main and secondary processor) sends a fixed answer sequence over CAN only if both its processors work together correctly; the monitoring module (engine, transmission or hybrid control module) sets P06AF if the pattern is wrong or missing. In all GM tables from 2016 to 2025 it is type A – lamp in the first trip – and the torque management may shut the engine down for safety. Typical causes are processor or software faults in one of the modules, communication problems or supply interruptions. Look for further processor codes (P0606, P060A, P060B) and software bulletins. No other manufacturer document available to us uses P06AF.

Likely causes

Software fault in engine, transmission or hybrid module
Processor fault in one of the modules
CAN communication disturbance between the modules
Supply interruption or poor ground of a module

Symptoms

  • Check engine light
  • Engine shuts off or does not start
  • Reduced power
  • Further processor or communication codes

Repair estimate

DifficultyHardWorkshop job
Parts and labour€100–1,500
Time0.5–3 h

Typical range across vehicles; the real cost depends on what the testing finds.

Parts involved

engine control moduletransmission control modulecan bus

Related codes

P0606P060AP060BP061AP0700

References: law.cornell.edu, gsi.ext.gm.com, gsi.ext.gm.com, gsi.ext.gm.com.