P0606 TOYOTA - ECM Processor Error
Possible causes
- Faulty Engine Control Module (ECM)
- Engine Control Module (ECM) Harness power supply circuit is open or shorted
- Engine Control Module (ECM) Programming
Tech notes
There is a factory service bulletin for the following Toyota models:
2005 Toyota Corolla
2006 Toyota Corolla
2007 Toyota Corolla
2005 Toyota Matrix
2006 Toyota Matrix
2007 Toyota Matrix
2005-2007 Toyota Corolla, Matrix Factory Service Bulletin OBDII code P0606
When is the code detected?
Possible symptoms
- Engine Light ON (or Service Engine Soon Warning Light)
- Engine may not start
P0606 Toyota Description
The Engine Control Module (ECM) continuously monitors its internal memory status, internal circuits, and output signals to the throttle actuator. This self−check insures that the ECM is functioning properly. If any malfunction is detected, the ECM will set the code and illuminate the engine light.
The ECM memory status is diagnosed by internal mirroring of the main CPU and the sub CPU to detect Random Access Memory (RAM) errors. The two CPUs also perform continuous mutual monitoring. The ECM illuminates the MIL and sets a DTC if: 1) outputs from the two CPUs are different or deviate from the standards, 2) the signals sent to the throttle actuator deviate from the standards, 3) a malfunction is found in the throttle actuator supply voltage, and 4) any other ECM malfunction is found.

P0606 Toyota Information for specific Toyota models
P0606 2007 TOYOTA CAMRY
P0606 2008 TOYOTA CAMRY
P0606 2009 TOYOTA CAMRY
P0606 2010 TOYOTA CAMRY
P0606 2011 TOYOTA CAMRY
P0606 2001 TOYOTA HIGHLANDER
P0606 2002 TOYOTA HIGHLANDER
P0606 2003 TOYOTA HIGHLANDER
P0606 2004 TOYOTA HIGHLANDER
P0606 2005 TOYOTA HIGHLANDER
P0606 2006 TOYOTA HIGHLANDER
P0606 2007 TOYOTA HIGHLANDER
P0606 2004 TOYOTA PRIUS
P0606 2005 TOYOTA PRIUS
P0606 2006 TOYOTA PRIUS
P0606 2007 TOYOTA PRIUS
P0606 2008 TOYOTA PRIUS
P0606 2009 TOYOTA PRIUS