Check the Engine Control Module (ECM) fuse, if the fuse is OK then try erasing the code first and if the code comes back you may have to reprogram or replace the ECM.
Check the 'Possible Causes' listed above. Visually inspect the related wiring harness and connectors. Check for damaged components and look for broken, bent, pushed out, or corroded connector pins.
The cost to diagnose the P1607 Toyota code is 1.0 hour of labor. The diagnosis time and labor rates at auto repair shops vary depending on the location, make and model of the vehicle, and even the engine type. Most auto repair shops charge between $75 and $150 per hour.
The Engine Control Module (ECM) continuously monitors its main and sub-CPUs for cruise control. This self-check ensures that the ECM is functioning correctly. If outputs from the CPUs differ and deviate from the standards, the ECM will illuminate the MIL and set the Diagnostic Trouble Code (DTC) immediately.
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