# Service bulletin P4 Trailer Hold

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: 10146344
- Published by NHTSA: 2018\-10\-29
- Manufacturer's number: P4 Trailer Hold
- Manufacturer's date: 2018\-05\-21
- NHTSA component: EXTERIOR LIGHTING:BRAKE LIGHTS; PARKING BRAKE

## NHTSA's summary

Trailer Hold System Testing

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10146344-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10146344-0001.pdf)

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

## Components

Brakes, Lighting, Brake lights, Parking brake

## Vehicles listed

- 2019 FREIGHTLINER CASCADIA

## Recalls for the same vehicles and component

- [20V567000](/recalls/nhtsa/20V567000.md), 2022-02-16: EXTERIOR LIGHTING:BRAKE LIGHTS

## Other bulletins for the same vehicles and component

- [CALFTL54\-002](/bulletins/10194444.md), 2021-05-25, Service bulletin: ELECTRICAL SYSTEM; PARKING BRAKE. Customer Advisory Letter on Enabling Horn Alarm with the Door Open and the Park Brake Set
- [DOC\-1034225](/bulletins/10161117.md), 2019-06-10, Service bulletin: PARKING BRAKE:INDICATOR LIGHT. Accent / Park Light Function Disable Accent / Park Light Function Disable
- [ICI19\-009 FL799](/bulletins/10160782.md), 2019-06-03, Service bulletin: EXTERIOR LIGHTING:BRAKE LIGHTS:SWITCH. Steer Axle Brake Chatter
- [York Loose Calip](/bulletins/10151567.md), 2018-12-10, Service bulletin: PARKING BRAKE. York Loose Caliper Letter to Customer
- [DOC\-1033416](/bulletins/10141865.md), 2018-06-18, Service bulletin: PARKING BRAKE; ELECTRICAL SYSTEM:SOFTWARE. SS 1033416 New Cascadia ICUC Brake Drag Warning Message Appears For Approximately 3 Seconds When Applying Or Releasing The Parking Brake

JSON: [/v1/bulletins/10146344](/v1/bulletins/10146344)

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