Service bulletin KC-2107
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 | 10208548 |
| Published by NHTSA | 2022-03-03 |
| Manufacturer's number | KC-2107 |
| Manufacturer's date | 2022-02-18 |
| NHTSA component | UNKNOWN OR OTHER; ENGINE AND ENGINE COOLING |
NHTSA's summary
DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions and Newer
The document
The document is the manufacturer's. This site does not hold it. NHTSA files a document at one of these two addresses; we have not asked NHTSA which.
Components
Engine
| MACK ANTHEM (AN) | 2017 |
|---|---|
| MACK ANTHEM (AN) | 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| MACK CHU | 2017 to 2018 |
| MACK CXU | 2017 to 2018 |
| MACK GRANITE (GR) | 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| MACK GRANITE (GU) | 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| MACK GU | 2017 to 2018 |
| MACK LEU | 2017 |
| MACK LR | 2017, 2018, 2019, 2020, 2021, 2022 |
| MACK LR ELECTRIC | 2020 |
| MACK MD | 2020, 2021, 2022 |
| MACK MRU | 2017 to 2018 |
| MACK PINNACLE (CHU) | 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| MACK PINNACLE (CXU) | 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| MACK PINNACLE (PI/PN) | 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| MACK TD | 2017 to 2019 |
| MACK TE | 2019 to 2021 |
| MACK TERRAPRO (LEU/MRU) | 2017, 2018, 2019 (the catalog's model; the bulletin names a series or trim of it) |
| MACK TERRAPRO (MRU) | 2017, 2018, 2019, 2020, 2021, 2022 (the catalog's model; the bulletin names a series or trim of it) |
| MACK TERRAPRO (TE) | 2017, 2018 (the catalog's model; the bulletin names a series or trim of it) |
| MACK TERRAPRO (TE) | 2022 (the catalog's model; the bulletin names a series or trim of it) |
| MACK TITAN (TD) | 2017 to 2018 |
Listing a model year does not mean every vehicle of it is concerned: the document says which.
| 26V139000 | 2026-03-11. ENGINE AND ENGINE COOLING:ENGINE:ENGINE CONTROL MODULE (ECU/ECM):SOFTWARE |
|---|
A recall listed here may apply to some of the same vehicles. Only the manufacturer can say whether it applies to one vehicle.
| TSB M-913-001 202609 | 2026-10-02. Service bulletin. Parker engine-mounted hydraulic pump service bulletin. |
|---|---|
| M0304 EC0033 202606 | 2026-06-29. Emissions. Mack Trucks has determined that certain vehicles equipped with a model year (“MY”) 2017-2018 MP8 Turbo Compound (TC) engine may not meet California and Federal Regulations (CARB). This Recall is for updated software that will reduce the amount of time necessary for the system to operate in a cold engine warm-up strategy and provide health monitoring of the Selective Catalyst Reduction (SCR). |
| M0039 032026 | 2026-04-02. Emissions. Emissions - EC0039 MST21 Failure to Detect P20EE - AN, CHU. |
| M0302 022026 | 2026-03-03. Emissions. 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 | 2026-02-03. Service bulletin. 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 2128-7 202601 | 2026-02-03. Service bulletin. CBR - Engine Control Module (EMS) Software Information - Improvement List (Change Log), US21+OBD2021 Emissions ONLY |
| CBR 2107-22 202601 | 2026-02-02. Service bulletin. CBR - Mack DEF Level (UQLS) Sensor Troubleshooting Guide - US17+OBD16 Emissions to US22+OBD2023 (DOES NOT APPLY TO AN(4) and PR(4)). |
| CBR 199 202512 | 2026-01-05. Service bulletin. Vehicles affected by this issue will show coolant runoff on the front rights side of the engine. |
| CBR 2171-11 202511 | 2025-12-03. Service bulletin. CBR - Mack Temperature Sensor Troubleshooting Guide |
| CBR 199-6 202511 | 2025-12-03. Service bulletin. CBR - 13 Liter Engines ONLY - Engine Coolant Pump Housing Leak; Coolant Found Around The Oil Cooler Duct Cover Or In Between The Coolant Pump Housing And Oil Cooler Housing. |