# Service bulletin B18100D

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: 10146073
- Published by NHTSA: 2018\-10\-29
- Manufacturer's number: B18100D
- Manufacturer's date: 2018\-10\-16
- NHTSA component: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\)

## NHTSA's summary

Servicenews article \- Is the MIL on with DTC P2271 \(secondary HO2S \[sensor 2\] circuit signal stuck rich\)? What's likely causing this is the PCM is misinterpreting the A/F sensor \(sensor 1\) signals, causing the PCM to think that sensor 2 is stuck rich.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10146073-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10146073-0001.pdf)

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

## Components

Electrical system, Transmission and driveline, Automatic transmission, Transmission control module

## Trouble codes named

P2271

## Vehicles listed

- 2007 to 2008 ACURA TSX

## Other bulletins for the same vehicles and component

- [BTS180603](/bulletins/10142451.md), 2018-07-02, Service bulletin: ELECTRICAL SYSTEM; POWER TRAIN:AUTOMATIC TRANSMISSION:CONTROL MODULE \(TCM/PCM/TECM\). Tech line summary article \- Is the MIL on with DTC P2271 \(secondary HO2S \[sensor 2\] circuit signal stuck rich\)? What's likely causing this is the PCM is misinterpreting the A/F sensor \(sensor 1\) signals, causing the PCM to think that sensor 2 is stuck rich. To fix this issue, replace both sensors.

JSON: [/v1/bulletins/10146073](/v1/bulletins/10146073)

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