For Shop Owners

P1600 TOYOTA - ECM BATT Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3 What does this mean?

Possible causes

  • Open in back up power source circuit
  • Faulty Engine Control Module (ECM)
  • Engine Control Module (ECM) harness is open or shorted
  • Engine Control Module (ECM) circuit poor electrical connection
What does this mean?

Tech notes

Start by checking the EFI fuse.
What does this mean?

Possible symptoms

  • Engine Light ON (or Service Engine Soon Warning Light)

P1600 TOYOTA Description

Battery positive voltage is supplied to terminal BATT of the Engine Control Module (ECM) even when the ignition switch is OFF for use by the Diagnostic Trouble Code (DTC) memory and air–fuel ratio adaptive control value memory, etc.
OBDII Code P1600 Toyota - ECM BATT Malfunction -

P1600 TOYOTA Information for specific Toyota models

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P1600 TOYOTA Comments

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Any information is appreciated. Thanks
Repair Importance Level: 3
1=Low 2=Medium 3=High
Repair Difficulty Level: 3
1=Easy 2=Moderate 3=Hard

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