OBDII Code List

P1600 SCION - ECM BATT Malfunction

Repair Importance Level: 3/3
Repair Difficulty Level: 3/3   
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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

Tech notes

Start by checking the EFI fuse.

Possible symptoms

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

P1600 Scion 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 Scion - ECM BATT Malfunction -

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P1600 SCION Comments

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