# Service bulletin TechTalk4638

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: 10183396
- Published by NHTSA: 2020\-12\-04
- Manufacturer's number: TechTalk4638
- Manufacturer's date: 2020\-11\-03
- NHTSA component: ENGINE AND ENGINE COOLING; EQUIPMENT

## NHTSA's summary

Tech Talk discussion on Intake manifold pressure too low.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183396-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10183396-9999.pdf)

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

## Components

Engine, Equipment and accessories

## Vehicles listed

- 2014 FREIGHTLINER CASCADIA

## Recalls for the same vehicles and component

- [17V810000](/recalls/nhtsa/17V810000.md), 2017-12-15: EQUIPMENT
- [15V816000](/recalls/nhtsa/15V816000.md), 2015-12-07: ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
- [14V680000](/recalls/nhtsa/14V680000.md), 2014-10-29: FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:MANIFOLD/HEADER/MUFFLER/TAIL PIPE
- [14V588000](/recalls/nhtsa/14V588000.md), 2014-09-23: EQUIPMENT:ELECTRICAL
- [14V080000](/recalls/nhtsa/14V080000.md), 2014-02-21: ENGINE AND ENGINE COOLING:ENGINE

## Other bulletins for the same vehicles and component

- [ICI24\-031](/bulletins/11007487.md), 2024-09-07, Other: ENGINE. Important Campaign Information letter for DDC D23M3 \- Campaign Reactivated and Extended. Field Service Campaign D23M3 \- GHG17 DETROITTM DD16® Vibration Damper Replacement has been extended for an additional 6 months.
- [SB83\-137](/bulletins/10209296.md), 2022-04-01, Service bulletin: ENGINE AND ENGINE COOLING. Revised Freightliner Service Bulletin for ParkSmart Eberspaecher Auxiliary Heater Service. This bulletin replaces the version dated May 2015. The note in General Information has been revised to include New Cascadia. Espar information has been changed to reflect a company name change to Eberspaecher.
- [SB49\-042](/bulletins/10208389.md), 2022-03-03, Service bulletin: ENGINE AND ENGINE COOLING. Freightliner Service Bulletin for DEF Connector Reinforcement Caps.
- [TechTalk8048](/bulletins/10194810.md), 2021-06-02, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM; EXTERIOR LIGHTING. Tech Talk continued discussion on Trailer ABS light on even when truck off.
- [FAB153](/bulletins/10193705.md), 2021-05-18, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM; FUEL SYSTEM, GASOLINE. Freightliner Action Bulletin FAB153 New Harness Highway for Cascadia
- [TSN 01\-07c](/bulletins/10193160.md), 2021-05-13, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY. Beyond routing and wiring concerns, the PCC system as previously implemented suffers from two timing / reporting issues. One stems from the long boot\-up time of the PCC module as compared to the CPC \(a.k.a. the 6N4C timer issue\), and the other stems from the potential of some PCC modules to lock\-up \(a.k.a. the NAND flash issue\). The timer concern is considered to primarily affect EPA10 units \(OBD13 already had a longer timer\) and most can be resolved by simply refreshing the CPC software \(even if an update is not available\). The module lock\-up software solution is currently being validated, so the PDC stock is not clean yet. However, lock\-up is anticipated to only be present in approximately 8% of PCC modules \(based on testing\), so \(ahead of a campaign\), here are instructions on how to reactivate a system, verify proper operation, and drive service actions.
- [TechTalk8121](/bulletins/10191779.md), 2021-05-06, Service bulletin: ELECTRICAL SYSTEM; SERVICE BRAKES; EQUIPMENT. Tech Talk continuing discussion on ABS 11 SPN 807.
- [D21R1](/bulletins/10191145.md), 2021-05-04, Service bulletin: ENGINE AND ENGINE COOLING. Detroit Emission Recall for GHG14 DETROIT DD13 with Two\-Box Aftertreatment Software Reprogramming. Certain Detroit Model Year 2013 to 2015 GHG14 DD13 engines that are registered in the state of California will require reprogramming to a minimum of the MCM and ACM software versions.
- [16TS\-08REV](/bulletins/10190555.md), 2021-04-24, Service bulletin: ENGINE AND ENGINE COOLING. Detroit Technical Service Letter for DD13 Cylinder Head and Cylinder Head Gasket Change.
- [WI21\-009](/bulletins/10190551.md), 2021-04-24, Service bulletin: ENGINE AND ENGINE COOLING. Warranty Information letter announcing that DTNA is increasing the Standard Diagnostic Times \(SDTs\) shown. The updated after treatment system \(ATS\) diesel exhaust fluid \(DEF\) pump times will be applied to repair orders opened on or after April 12, 2021.

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