GROUP

NUMBER

CAMPAIGN
DATE

Technical Service Bulletin
SUBJECT:

20-01-020H
MODEL(S)

MAY, 2020

SONATA HYBRID
(LF HEV)

AIR FILTER KIT AND NVLD REPLACEMENT
(SERVICE CAMPAIGN T4W)

 IMPORTANT

*** Dealer Stock and Retail Vehicles ***
Dealers must perform this Service Campaign whenever an affected vehicle is in the shop for any
maintenance or repair.
When a vehicle arrives at the Service Department, access Hyundai Motor America's Vehicle
Information Screen (VIS) via WEBDCS to identify open Campaigns.
Description: Certain 2016-2019 Sonata Hybrid (LF HEV) may experience check engine light
illumination with DTC P0456 - Evaporative System (EVAP) - Very Small Leak stored.
These conditions primarily occur in the California coastal areas that are subject to marine layer cloud
cover. Salt particulate deposit can form inside the Natural Vacuum Leak Detection (NVLD) sensor
which may cause intermittent operation prompting the DTC P0456 and check engine light.
This bulletin provides the procedure to install a new Air Filter Kit with an updated filter to help
prevent entry of the salt particulates.
In addition, replace NVLD sensor if DTC P0456 found stored in the Engine Control Module (ECM).
Applicable Vehicles: Certain 2016-2019 Sonata Hybrid (LF HEV)
Parts Information:
Part Number

31450-E6501QQH



Description
AIR FILTER KIT
Vent pipe, mounting
brackets and hoses
assembly
Filter with inlet hose
Band strap

Photo

Remarks

All vehicles

31480-4R100QQH

NVLD
Pressure Sensor Assembly

Replace if DTC
P0456 is stored

00232-19035

UNDERCOATING AEROSOL
(Non-Rubberized Type)

One canister can
be applied to 10
vehicles

Circulate To: General Manager, Service Manager, Parts Manager, Warranty Manager, Service
Advisors, Technicians, Body Shop Manager, Fleet Repair

SUBJECT:

A I R F I L T E R K I T A N D N V L D R E P L A C E M E N T ( SERVICE CAMPAIGN T4W)

Warranty Information:
Model

Op. Code

Operation

Op. Time

Causal
P/N

Nature Cause
Code Code

SONATA
HYBRID
(LF HEV)

00D028R0

AIR FILTER KIT
REPLACEMENT

1.0 M/H

31450-E6501QQH

I3A

ZZ3

AIR FILTER KIT &
1.3 M/H 31480-4R100QQH
I3A
ZZ3
NVLD REPLACEMENT
NOTE 1: Submit Claim on Campaign Claim Entry Screen.
NOTE 2: If a part is found in need of replacement while performing Service Campaign T4W and the
affected part is still under warranty, submit a separate claim using the same Repair Order. If the
affected part is out of warranty submit a Prior Approval Request for goodwill consideration prior to
performing the work.
NOTE 3: Undercoating aerosol application will be reimbursed as sublet under both labor operations.
00D028R1

Service Procedure:

Check for DTC in ECM.
Is P0456 (Active, Pending or
History) stored?

NO

YES
 Replace Air Filter KIT (Steps #1 to #9
and #12 to #15)
 Replace NVLD (Steps #10 & 11)
 Perform GDS-M EVAP Leakage Test
(Step #16)

 Replace Air Filter KIT (Steps #1 to #9
and #12 to #15)
 Perform GDS-M EVAP Leakage Test
(Step #16)

A.
1.

AIR FILTER KIT REPLACEMENT
Open the fuel filler door and loosen the filler
neck mounting bolts (A).

A

A

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2.

A I R F I L T E R K I T A N D N V L D R E P L A C E M E N T ( SERVICE CAMPAIGN T4W)

Lift up the vehicle and remove the left rear
tire & wheel assembly (B).

B

3.

Remove the left rear wheel guard (C).
C

4.

Release the hose clamp and disconnect the
upper hose (D).
Disconnect the Canister Close Valve (CCV)
connector (E).

D
F

Loosen the air filter mounting bolts (F).

E

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5.

A I R F I L T E R K I T A N D N V L D R E P L A C E M E N T ( SERVICE CAMPAIGN T4W)

Release the hose clamp.
Disconnect the lower hose (G) and air filter
from the vent line.

G

NOTICE
Utilize a ratcheting wrench type or low profile ratchet and socket combo where
mounting bolts accessibility is limited.
Scrub off the undercoating material from the bolt heads and threads for ease of
loosening bolts.
6.

Loosen the upper vent line bracket clamping
bolt (H).
Note: Mounting bolt head is facing towards
the body.
H

7.

Release the hose clamp and disconnect the
ventilation hose (I) from the Nature Vacuum
Leak Detection (NVLD) valve.

I

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8.

A I R F I L T E R K I T A N D N V L D R E P L A C E M E N T ( SERVICE CAMPAIGN T4W)

Loosen the lower vent line bracket mounting
bolt (J).
Then pull away the lines slightly and loosen
the clamping bracket bolt (K).

K

J

9.

Remove the filler neck vent line, upper hose
and air filter.

B.

NVLD REPLACEMENT

10.

Disconnect the NVLD connector (L).
Release the hose clamp and disconnect the
vent hoses (M).

L
M

M

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11.

A I R F I L T E R K I T A N D N V L D R E P L A C E M E N T ( SERVICE CAMPAIGN T4W)

Loosen the NVLD mounting bolts (N) and
remove the NVLD.
Tightening Torque
: 2.3 ~ 3.3 N.m (0.2 ~ 0.3 kgf.m, 1.7 ~ 2.5
lb-ft)

N

Install the new NVLD and reinstall the
removed parts in reverse order of removal.

12.

NOTICE
Require to separate and reuse the CCV
which is part of the removed air filter.
Lift up the locking lever, rotate CCV 30
degrees and then pull away to release the
CCV.

13.

Install the new air filter KIT and reinstall the
removed parts, including CCV, in reverse
order of removal.

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A I R F I L T E R K I T A N D N V L D R E P L A C E M E N T ( SERVICE CAMPAIGN T4W)

NOTICE
Follow markings to ensure vent pipes
and brackets are aligned properly.

14.

Spray the black undercoating aerosol evenly
to each vent line bracket for approximately
10 seconds.

15.

After spaying, tie the CCV wiring and vent
pipe using band strap (O).
O

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C.

A I R F I L T E R K I T A N D N V L D R E P L A C E M E N T ( SERVICE CAMPAIGN T4W)

GDS Evap Leakage Test:
Follow GDS instructions and perform GDS
Evap Leakage Test to confirm parts and
hoses are installed properly.

16.

17.

Check for installed parts and hose
connections if EVAP leakage is detected.
After making corrections, clear the DTC(s)
and perform GDS Evap Leakage Test again.
Repair procedure is completed if EVAP
Leakage Test doesn’t detect any leakage.

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