# Service bulletin Dealer Best Prac

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: 10160156
- Published by NHTSA: 2019\-05\-20
- Manufacturer's number: Dealer Best Prac
- Manufacturer's date: 2019\-04\-30
- NHTSA component: ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING

## NHTSA's summary

Hyundai has launched a Service Campaign to update the ECM \(Engine Control Module\) software for DTC P0128: Coolant Thermostat \(Coolant Temp below Thermostat Regulating Temperature\) logic improvement.

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2019/MC-10160156-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2019/MC-10160156-9999.pdf)

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

## Components

Electrical system, Engine, Software

## Trouble codes named

P0128

## Vehicles listed

- 2018 HYUNDAI ELANTRA GT
- 2019 HYUNDAI VELOSTER

## 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.
- [21\-01\-023H\-4](/bulletins/10207803.md), 2022-02-08, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. Hyundai is conducting a campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp \(MIL\) will blink continuously, and the vehicle will be placed in Engine Protection Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Engine Protection Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800\-2000 RPM.
- [20\-01\-024H\-2](/bulletins/10185445.md), 2021-01-09, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. Applicable vehicles with 2.0L Turbo and 2.4L GDI engines may experience the Check Engine warning lamp illuminated with DTC P1326. Follow the procedure to inspect the vehicle and replace the engine or update the engine ECU software based on the inspection results. Consult the Hyundai Warranty Policy \& Procedures and the below chart to determine New or Reman engine usage.
- [20\-01\-004H\-2](/bulletins/10183957.md), 2020-12-08, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT; ENGINE AND ENGINE COOLING. Applicable vehicles with 2.0L Turbo and 2.4L GDI engines may experience the Check Engine warning lamp illuminated with DTC P1326. Follow the procedure to inspect the vehicle and replace the engine or update the engine ECU software based on the inspection results.
- [20\-FL\-006H\-1](/bulletins/10178182.md), 2020-08-07, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ENGINE AND ENGINE COOLING. This bulletin provides information related to the Engine Control Module \(ECM\) software logic update for DTC P0300\-P0304 Misfire. This update addresses the intermittent misfire that may only occur at cold engine warmup.
- [20\-FL\-006H](/bulletins/10177129.md), 2020-07-08, Service bulletin: ENGINE AND ENGINE COOLING; ELECTRICAL SYSTEM:SOFTWARE. This bulletin provides information related to the Engine Control Module \(ECM\) software logic update for DTC P0300\-P0304 Misfire. This update addresses an incident of intermittent misfire that may only occur at cold engine warmup.
- [20\-01\-004H\-1](/bulletins/10177126.md), 2020-07-08, Service bulletin: ELECTRICAL SYSTEM:SOFTWARE; ENGINE. Applicable vehicles with 2.0L Turbo and 2.4L GDI engines may experience the Check Engine warning lamp illuminated with DTC P1326. Follow the procedure to inspect the vehicle and replace the engine or update the engine ECU software based on the inspection results.
- [20\-01\-024H](/bulletins/10177125.md), 2020-07-08, Service bulletin: ENGINE; ELECTRICAL SYSTEM:SOFTWARE. Applicable vehicles with 2.0L Turbo and 2.4L GDI engines may experience the Check Engine warning lamp illuminated with DTC P1326. Follow the procedure to inspect the vehicle and replace the engine or update the engine ECU software based on the inspection results. Consult the Hyundai Warranty Policy \& Procedures and the below chart to determine New or Reman engine usage.
- [20\-01\-004H \- The](/bulletins/10172224.md), 2020-03-07, Service bulletin: EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING; EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE. Applicable vehicles with 2.0L Turbo and 2.4L GDI engines may experience the Check Engine warning lamp illuminated with DTC P1326. Follow the procedure to inspect the vehicle and replace the engine or update the engine ECU software based on the inspection results.
- [20\-01\-006H](/bulletins/10172223.md), 2020-03-07, Service bulletin: EQUIPMENT; ELECTRICAL SYSTEM:SOFTWARE; EQUIPMENT ADAPTIVE/MOBILITY; ENGINE AND ENGINE COOLING. Hyundai is conducting a product improvement campaign to enhance the knock sensor software to detect abnormal engine bearing noise before potentially severe engine damage occurs. If abnormal engine bearing noise is detected, the Malfunction Indicator Lamp \(MIL\) will blink continuously, a chime will sound on certain vehicles, and the vehicle will be placed in Engine Protection Mode allowing the customer to drive to the nearest Hyundai dealer for diagnosis and repair. In addition, DTC P132600 will be recorded in the ECM. The vehicle can continue to be operated for a limited time in Engine Protection Mode, but it will accelerate slower and have a reduced maximum speed. Engine RPMs will be limited to approximately 1800\-2000 RPM.

JSON: [/v1/bulletins/10160156](/v1/bulletins/10160156)

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