# Service bulletin 11\-183\-18R

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: 10146481
- Published by NHTSA: 2018\-11\-05
- Manufacturer's number: 11\-183\-18R
- Manufacturer's date: 2018\-09\-27
- NHTSA component: ENGINE AND ENGINE COOLING:ENGINE:GASOLINE:TURBO/SUPERCHARGER

## NHTSA's summary

This bulletin announces reprogramming file availability to optimize the ECM. These new files involve the ECM?s diagnosis of DTC P0045: TURBOCHARGER / SUPERCHARGER BOOST CONTROL ?A? CIRCUIT OPEN and DTC P2196: A/F O2 SENSOR SIGNAL BIASED / STUCK RICH BANK 1 SENSOR 1. For P0045, in some cases, an engine RPM drop may occur when selecting D or R range too quickly following ignition on and before the engine reaches full operation during the ECM?s initial control of the waste gate valve. Should this occur P0045 may set the next time the engine is started. For P2196, if the driver "snaps" the throttle open and shut rapidly, normal judgement of the A/F sensor data may be inaccurate and cause the code to be detected in error.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10146481-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10146481-0001.pdf)

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

## Components

Engine, Turbocharger or supercharger

## Trouble codes named

P0045, P2196

## Vehicles listed

- 2019 SUBARU ASCENT

JSON: [/v1/bulletins/10146481](/v1/bulletins/10146481)

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