# Service bulletin 20\-FL\-007H

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: 10178170
- Published by NHTSA: 2020\-08\-07
- Manufacturer's number: 20\-FL\-007H
- Manufacturer's date: 2020\-07\-13
- NHTSA component: ENGINE AND ENGINE COOLING; EQUIPMENT ADAPTIVE/MOBILITY; ELECTRICAL SYSTEM:SOFTWARE

## NHTSA's summary

This bulletin provides information related to an ECM \(Engine Control Module\) software update for DTC P0128: Coolant Thermostat \(Coolant Temp below Thermostat Regulating Temperature\) logic revision. There are no drivability symptoms associated with DTC P0128.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178170-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2020/MC-10178170-9999.pdf)

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

## Components

Electrical system, Engine, Equipment and accessories, Software

## Trouble codes named

P0128

## Vehicles listed

- 2019 to 2020 HYUNDAI ELANTRA

## Other bulletins for the same vehicles and component

- [22\-01\-043H](/bulletins/10213718.md), 2022-06-10, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE AND ENGINE COOLING. Hyundai is conducting a service campaign to enhance the knock sensor logic with the Cylinder Noise Diagnostic System \(CNDS\) software update. CNDS is to detect abnormal cylinder wall scuffing or noise of the engine block before potentially severe engine damage occurs. If abnormal noise is detected, the Malfunction Indicator Lamp \(MIL\) will blink continuously. In addition, DTC P1327 will be recorded in the ECM.
- [Campaign T3W Dea](/bulletins/10172219.md), 2020-03-07, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE AND ENGINE COOLING. Hyundai is conducting a Service Campaign related to an Electronic Control Module \(ECM\) software update to include cylinder imbalance learning logic optimization for Malfunction Indicator Light illumination.
- [20\-01\-008H](/bulletins/10172215.md), 2020-03-07, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information related to the Engine Control Module \(ECM\) software update for 2018 \- 2019MY Elantra \(AD/ADA\) vehicles equipped with 2.0L engine. This software update includes cylinder imbalance learning logic optimization for Malfunction Indicator Light illumination with DTC P0300/P0301/P0302/P0303/P0304 \(Cylinder “X” – misfire detected\).

JSON: [/v1/bulletins/10178170](/v1/bulletins/10178170)

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