# Service bulletin K59752430

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: 10141402
- Published by NHTSA: 2018\-06\-18
- Manufacturer's number: K59752430
- Manufacturer's date: 2018\-04\-20
- NHTSA component: EQUIPMENT; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM:EMISSION CONTROL

## NHTSA's summary

Mack Chassis \- Diagnostic Trouble Code \( DTC \) P20CF, Diagnosis And Repair \- US14\+OBD15, Commonly Model Year 2016

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2018/MC-10141402-9999.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2018/MC-10141402-0001.pdf)

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

## Components

Engine, Equipment and accessories, Exhaust and emissions

## Trouble codes named

P20CF

## Vehicles listed

- 2016 MACK CHU
- 2016 MACK CXU
- 2016 MACK GU
- 2016 MACK LR
- 2016 MACK MRU

## Recalls for the same vehicles and component

- [15V702000](/recalls/nhtsa/15V702000.md), 2015-10-26: ENGINE AND ENGINE COOLING:ENGINE:OTHER FUEL TYPES:TURBO/SUPERCHARGER

## Other bulletins for the same vehicles and component

- [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 2171\-11 202511](/bulletins/11026025.md), 2025-12-03, Service bulletin: ENGINE; ELECTRICAL SYSTEM. CBR \- Mack Temperature Sensor Troubleshooting Guide
- [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 \(Low Oil Pressure\) \(Possible Related Codes \- SPN4811 , SPN 100 , PID 100\)
- [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.
- [CBR\-561 202408](/bulletins/11006925.md), 2024-09-04, Service bulletin: ENGINE. CBR: 11L, 13L, And 16L Engine Oil Analysis Specifications \- US10 And Newer Emissions
- [CBR\-2139 202405](/bulletins/11000831.md), 2024-06-04, Service bulletin: FUEL/PROPULSION SYSTEM; ENGINE. CBR: Vehicles built with an 11 liter engine may experience a complaint of excessive fuel in the oil. It is possible that the source of the fuel is the rear fuel galley plug in the cylinder head. A new and improved fuel galley plug has been developed to resolve this issue.
- [EC0028M 202312](/bulletins/10248108.md), 2024-01-03, Service bulletin: ENGINE AND ENGINE COOLING; UNKNOWN OR OTHER. Emissions Campaign: Mack Trucks has determined that certain 2014 \- 2018 commercial model year CXU, GU, LEU, LR, MRU Vehicles require a replacement Diesel Particulate Filter \(DPF\) along with updated software.
- [CBR\-2320 202312](/bulletins/10248101.md), 2024-01-03, Service bulletin: ENGINE AND ENGINE COOLING. CBR: For vehicles equipped with an 11L engine, the plastic saddle bracket holding the a/c line on the left side of the engine may move excessively and rub the area where it secures the line.
- [M\-258\-014 202309](/bulletins/10243453.md), 2023-10-03, Service bulletin: ENGINE AND ENGINE COOLING:ENGINE:DIESEL; ENGINE AND ENGINE COOLING. TSB: Aftertreatment Diesel Exhaust Fluid \(DEF\) Tank, Level Sensor, Replacement

JSON: [/v1/bulletins/10141402](/v1/bulletins/10141402)

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