# Service bulletin PC1023

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: 10189657
- Published by NHTSA: 2021\-04\-02
- Manufacturer's number: PC1023
- Manufacturer's date: 2021\-03\-29
- NHTSA component: FUEL SYSTEM, DIESEL

## NHTSA's summary

DEF level sensor failure

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189657-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10189657-9999.pdf)

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

## Components

Fuel system

## Vehicles listed

- 2016 NOVA BUS LFS

## Recalls for the same vehicles and component

- [21V351000](/recalls/nhtsa/21V351000.md), 2021-05-14: FUEL SYSTEM, DIESEL:FUEL INJECTION SYSTEM:FUEL RAIL

## Other bulletins for the same vehicles and component

- [BS5467E](/bulletins/10244198.md), 2023-10-17, Service bulletin: STRUCTURE; FUEL SYSTEM, GASOLINE. Potential presence of a gap may cause frame crack. Only to perform during a frame crack repair process near front bolt of joint \#2.
- [FT4651](/bulletins/10240760.md), 2023-08-17, Service bulletin: FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM. Failure of DEF sensor GEN 6 within the expected 5\-years lifespan.
- [LI5228ER1](/bulletins/10214835.md), 2022-06-30, Service bulletin: FUEL SYSTEM, GASOLINE. DEF tank Head Unit GEN4
- [PC1022](/bulletins/10189655.md), 2021-04-02, Service bulletin: FUEL SYSTEM, DIESEL. DEF level sensor failure
- [LI4774E](/bulletins/10171329.md), 2020-02-10, Service bulletin: FUEL SYSTEM, GASOLINE. Bad torque sequence and engine rail flatness out of tolerance at fuel tank mounts created preload in the chassis leading to premature failure.
- [FT4598](/bulletins/10161096.md), 2019-06-10, Service bulletin: ENGINE; FUEL SYSTEM, GASOLINE. Ramp pump assembly with aluminum reservoir cracking
- [LI4289ER1](/bulletins/10135008.md), 2018-04-23, Service bulletin: FUEL SYSTEM, OTHER. Oil filler tube part number superceeded by improved tube
- [LI4263ER1](/bulletins/10130022.md), 2018-03-12, Service bulletin: FUEL SYSTEM, DIESEL; ENGINE AND ENGINE COOLING:EXHAUST SYSTEM; ENGINE. Subject to application and duty cycle, DEF dosing valve can clog up and cause engine to derate, stall, lose power and log FC3568. Increasing dosing valve and DEF hose angle can help reduce such occurrence. Vehicles reporting repetitive FC3568 can be modified according to procedure herein.
- [BS3887E](/bulletins/10117823.md), 2017-09-14, Service bulletin: FUEL SYSTEM, OTHER; FUEL SYSTEM, OTHER:STORAGE:TANK ASSEMBLY:PRESSURE RELIEF DEVICES. Dust cap from PRD vent pipe of rear regulator on CNG units may pull off
- [BS3785E](/bulletins/10083929.md), 2016-11-04, Service bulletin: FUEL/PROPULSION SYSTEM; FUEL SYSTEM, OTHER:DELIVERY:HOSES, LINES/PIPING, AND FITTINGS. "CNG FUEL LINE THAT RUNS TO THE SPHEROS AUX HEATER UNIT MAY COME INTO CONTACT WITH THE ENGINE CRADLE AND MAY CAUSE DAMAGE DUE TO CHAFFING."

JSON: [/v1/bulletins/10189657](/v1/bulletins/10189657)

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