LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Lexus >> 2023 >> NX 250 AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Stop And Start System - Diagnostic Codes (1 Of 2) >> Stop And Start System >> DTC P0606-29: Backup Boost Converter "A" Control CPU Signal Invalid [11/2021 - 03/2023] >> Description
April 5, 2026: LEMON Manuals is launched! Read the announcement.

DTC P0606-29: Backup Boost Converter "A" Control CPU Signal Invalid [11/2021 - 03/2023]: Description

The engine stop and start ECU can detect open circuits when signals such as the boost, standby request or overheating signal cannot be sent to the backup boost converter control IC from the stop and start control IC in the engine stop and start ECU.

If a CPU duty malfunction is detected, the engine stop and start ECU stores DTC P0606-29 and blinks the stop and start cancel indicator.

DTC No. Detection Item DTC Detection Condition Trouble Area Warning Indicate Note
P0606-29 Backup Boost Converter "A" Control CPU Signal Invalid The following condition continues for 1 second or more (2 trip detection logic):
  • CPU duty malfunction is detected.
  • Wire harness or connector
  • Engine stop and start ECU
Blinks SAE Code: P0606