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DTC - Diagnostic Trouble Codes information

P0605

Powertrain Codes

P0605 - MAZDA - Internal Control Module ROM Error

Symptoms

- Engine Light ON (or Service Engine Soon Warning Light) - Engine may not start

Possible Causes

- ECM Harness power supply circuit is open or shorted - ECM Programing - Faulty ECM

When Detected

Indicates the ECM has experienced an internal memory fault.

Tech Notes

Check the ECM fuse, if fuse is OK try erasing the code first and if the code comes back you may have to reprogram or replaced the ECM.

Description

The ECM continuously monitors its own internal memory status, internal circuits, and output signals transmitted to the throttle actuator. This self-check insures that the ECM is functioning properly. If any malfunction is detected, the ECM sets the appropriate DTC and illuminates the MIL.