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DTC P1644-00: ECU Malfunction (Starter Circuit) [10/2022 - 11/2023]: Description

If a malfunction is detected in the starter circuit, the engine stop and start ECU stores DTC P1644-00.

DTC No. Detection Item DTC Detection Condition Trouble Area MIL Warning Indicate Note
P1644-00 ECU Malfunction (Starter Circuit) Both of the following conditions are met for 0.2 seconds or more (1 trip detection logic):
  • Ignition switch ON
  • Malfunction in starter circuit (STA)
  • Wire harness or connector
  • ST relay
  • Engine stop and start ECU
Comes on Does not come on SAE Code: P1644