# Service bulletin 21\-01\-041H

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: 10196482
- Published by NHTSA: 2021\-06\-10
- Manufacturer's number: 21\-01\-041H
- Manufacturer's date: 2021\-05\-18
- NHTSA component: ENGINE AND ENGINE COOLING

## NHTSA's summary

This bulletin provides information related to the Engine Control Module \(ECM\) software update for 2020MY Elantra \(AD/ADA\) vehicles equipped with 2.0L engine to revise the logic for the DTCs listed below. • P0068 \- Manifold Pressure \(MAP\) Sensor/Mass Air flow \(MAF\) Sensor \- Throttle Position Correlation • P0101 \- Mass Air flow \(MAF\) Sensor \- Range/Performance • P0106 \- MAP Sensor / Baro Pressure \(BARO\) Sensor B \(\#1\) \- Range/Performance

## The document

- [NHTSA's copy of the document (PDF)](https://static.nhtsa.gov/odi/tsbs/2021/MC-10196482-0001.pdf)
- [If that address does not open, try this one](https://static.nhtsa.gov/odi/tsbs/2021/MC-10196482-9999.pdf)

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

## Components

Engine

## Trouble codes named

P0068, P0101, P0106

## Vehicles listed

- 2020 HYUNDAI ELANTRA

## Recalls for the same vehicles and component

- [2021252](/recalls/tc/2021252.md), 2021-04-28: Engine
- [21V301000](/recalls/nhtsa/21V301000.md), 2021-04-28: ENGINE

## Other bulletins for the same vehicles and component

- [26\-EM\-016H TSB](/bulletins/11038458.md), 2026-10-14, Service bulletin: ENGINE. Some vehicles equipped with internal combustion engines may exhibit higher\-than\-expected engine oil consumption. This bulletin outlines the combustion chamber cleaning procedure for vehicles diagnosed with this condition. All internal combustion engines consume some engine oil during normal operation, depending on driving conditions and mileage, and this procedure should only be performed when deemed necessary based on inspection and diagnosis of the vehicle as outlined in TSB 26\-EM\-015H, Engine Oil Consumption – Inspection \& Repair Guidelines, or the latest revision.
- [26\-EM\-015H TSB](/bulletins/11038456.md), 2026-10-13, Service bulletin: ENGINE. Certain vehicles equipped with internal combustion engines may exhibit higher\-than\-expected engine oil consumption. This bulletin provides the inspection and repair procedures for vehicles exhibiting this condition. All internal combustion engines consume engine oil as part of normal engine operation. Oil consumption rates may vary based on mileage, operating conditions, driving habits, and maintenance history. Hyundai recommends following the prescribed maintenance schedule and periodically checking the engine oil level using the dipstick to maintain proper engine oil level.
- [9D3 OL](/bulletins/11037292.md), 2026-09-11, Service campaign: ENGINE; ELECTRICAL SYSTEM. Hyundai has become aware that your Hyundai Elantra equipped with a 2.0 ATK engine may have been incorrectly updated with Cylinder Noise Detection System \(CNDS\) software intended only for Korean\-built Elantra vehicles and may not meet specifications.
- [26\-01\-039H DN](/bulletins/11036204.md), 2026-08-15, Service campaign: ELECTRICAL SYSTEM; ENGINE. Certain Elantra \(ADA\) vehicles may have been incorrectly updated with Cylinder Noise Detection System \(CNDS\) software that can set DTC P132700; this software was intended only for Korean\-built Elantra \(AD\) vehicles. In addition, the California Air Resources Board has determined that these vehicles may be releasing air pollutants which exceed Federal and California standards.
- [26\-01\-039H TSB](/bulletins/11036202.md), 2026-08-15, Service campaign: ELECTRICAL SYSTEM; ENGINE. Certain Elantra \(ADA\) vehicles may have been incorrectly updated with Cylinder Noise Detection System \(CNDS\) software that can set DTC P132700; this software was intended only for Korean\-built Elantra \(AD\) vehicles. This bulletin provides instructions to perform a software update for the Engine Control Module \(ECM\) to revert to the original ROM ID, apply the emissions label under the hood, and provide the vehicle owner with Proof of Correction.
- [26\-EE\-003H TSB](/bulletins/11031400.md), 2026-04-21, Service bulletin: ENGINE; ELECTRICAL SYSTEM. Some vehicles may exhibit difficulty starting in cold weather. This bulletin provides the procedure to perform an inspection on the starter magnetic switch for potential freezing and, if necessary, replace the starter magnetic switch \(solenoid\) assembly.
- [23\-EM\-005H](/bulletins/10247189.md), 2023-12-15, Service bulletin: ENGINE AND ENGINE COOLING. This bulletin provides important checkpoint guidelines when performing engine oil and filter change services.
- [22\-EM\-010H](/bulletins/10217251.md), 2022-08-05, Service bulletin: ENGINE AND ENGINE COOLING. Follow the guidelines outlined in this bulletin to inspect and clean or replace certain components of the engine intake system accordingly during engine short block or sub\-assembly replacement.
- [22\-EM\-008H](/bulletins/10213724.md), 2022-06-10, Service bulletin: ENGINE AND ENGINE COOLING. Hyundai is conducting a service campaign 974 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.
- [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.

JSON: [/v1/bulletins/10196482](/v1/bulletins/10196482)

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