# Service bulletin U112 202309

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: 10243526
- Published by NHTSA: 2023\-10\-04
- Manufacturer's number: U112 202309
- Manufacturer's date: 2023\-09\-28
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

Owner Notification Letter, Extended Warranty Coverage U112. The Pre\-SCR NOx Sensor is the component provided coverage under this warranty extension.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243526-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2023/MC-10243526-9999.pdf)

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

## Components

Engine

## Vehicles listed

- 2017 MACK ANTHEM \(AN\)
- 2017 MACK CHU
- 2017 MACK CXU
- 2017 MACK GRANITE \(GR\)
- 2017 MACK GRANITE \(GU\)
- 2017 MACK GU
- 2017 MACK LEU
- 2017 MACK LR
- 2017 MACK MRU
- 2017 MACK PINNACLE \(CHU\)
- 2017 MACK PINNACLE \(CXU\)
- 2017 MACK TD
- 2017 MACK TERRAPRO \(LEU/MRU\)
- 2017 MACK TERRAPRO \(MRU\)
- 2017 MACK TERRAPRO \(TE\)
- 2017 MACK TITAN \(TD\)

## Other bulletins for the same vehicles and component

- [M0302 022026](/bulletins/11029451.md), 2026-03-03, Emissions: ENGINE. Emissions \- Mack Trucks has determined that certain vehicles equipped with a model year \(“MY”\) 2017\-2018 MP7 engine may not meet California and Federal Regulations \(CARB\).
- [CBR 820\-9 202601](/bulletins/11028051.md), 2026-02-03, Service bulletin: ENGINE; VEHICLE SPEED CONTROL. CBR \- Mack Chassis \- Engine Brake Only Works With The Brake Pedal, No Function During Cruise. US07 And Newer Emissions, Model Year 2008 And Newer.
- [CBR 2107\-22 202601](/bulletins/11028032.md), 2026-02-02, Service bulletin: ENGINE. CBR \- Mack DEF Level \(UQLS\) Sensor Troubleshooting Guide \- US17\+OBD16 Emissions to US22\+OBD2023 \(DOES NOT APPLY TO AN\(4\) and PR\(4\)\).
- [CBR 2171\-11 202511](/bulletins/11026025.md), 2025-12-03, Service bulletin: ENGINE; ELECTRICAL SYSTEM. CBR \- Mack Temperature Sensor Troubleshooting Guide
- [CBR 2107\-21 202505](/bulletins/11018813.md), 2025-06-02, Service bulletin: FUEL/PROPULSION SYSTEM; ENGINE. Mack DEF Level \(UQLS\) Sensor Troubleshooting Guide \- US17\+OBD16 Emissions and Newer
- [CBR 170\-8 202505](/bulletins/11018804.md), 2025-06-02, Service bulletin: ENGINE. Inactive Code P25AE00 Being Generated After A Hard Pull And A Momentary Drop In Engine Oil Pressure \(Low Oil Pressure\) \(Possible Related Codes \- SPN4811 , SPN 100 , PID 100\)
- [M0350 202504](/bulletins/11017732.md), 2025-05-05, Emissions: ENGINE. ER \- Mack Trucks has identified that the Selective Catalyst Reduction \(SCR\) system in certain vehicles equipped with the MY 2017 or 2018 MP8 VGT and Turbo Compound \(TC\) engines are not meeting California and EPA emissions standards, or Mack cannot confirm its compliance.
- [CBR\-561 202503](/bulletins/11016342.md), 2025-04-02, Service bulletin: ENGINE. If oil dilution is suspected refer to the applicable CBR solution below: ∙ CBR\-659􀁡Mack Chassis \- Oil Diluted With Fuel; Fuel In Oil, Diagnostic Information \- All Emissions, All Model Years
- [CBR\-997 202411](/bulletins/11010857.md), 2024-12-02, Service bulletin: ENGINE. Vehicles may present with oil leak coming from the clutch/flywheel housing and observation of burned clutch smell or clutch slipping. These symptoms can be mistaken as a crankshaft rear main seal leak, when the actual cause is the crankshaft adaptor O\-ring.
- [M0310 202410](/bulletins/11009710.md), 2024-11-04, Emissions: ENGINE. EMISISON RECALL \- SCR Replacement.

JSON: [/v1/bulletins/10243526](/v1/bulletins/10243526)

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