# Service bulletin TTT074523

A bulletin is a manufacturer's communication to its dealers, as NHTSA indexes it. The summary is NHTSA's. The document is the manufacturer's: read it at NHTSA. A bulletin is not a recall, and listing a model year does not mean every vehicle of it is concerned.

- Type: Service bulletin
- NHTSA id: 10249326
- Published by NHTSA: 2024\-01\-29
- Manufacturer's number: TTT074523
- Manufacturer's date: 2024\-12\-18
- NHTSA component: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

## NHTSA's summary

TSB: Some 2023 model year RX 500h vehicles may exhibit a MIL ON condition with Diagnostic Trouble Code \(DTC\) P24517F ? Evaporative Emission System Switching Valve Actuator Stuck Off present. This DTC may erroneously be displayed when the fault is related to DTC P14502A ? Fuel Tank Pressure Sensor Signal Stuck in Range. The Engine Control Model \(ECM\) \(SAE term: Powertrain Control Module/PCM\) logic has been modified so DTC P24517F will not be erroneously detected. Follow the Repair Procedure in this bulletin to address these conditions.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249326-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2024/MC-10249326-9999.pdf)

The document is the manufacturer's. This site does not hold it.

## Components

Engine, Exhaust and emissions

## Trouble codes named

P1450, P2451

## Vehicles listed

- 2023 LEXUS RX HYBRID

JSON: [/v1/bulletins/10249326](/v1/bulletins/10249326)

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