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Home >> Toyota >> 2015 >> Prius One >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 17 (Engine Control System (Diagnostic Codes (P0300-P0657)) (Except Plug-In)) >> SFI System >> DTC P0606: ECM / PCM Processor [08/2014 - ] >> Monitor Description
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Monitor Description

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The ECM continuously monitors its main and sub CPUs. This self-check ensures that the ECM is functioning properly. If outputs from these CPUs are different and deviate from the standard, the ECM illuminates the MIL and stores the DTC immediately.

DTC No. DTC Detection Condition Trouble Area
P0606 Either condition is met (1 trip detection logic):
  • There is an ECM main CPU error
  • There is an ECM sub CPU error
ECM