L-SB-0017-16

L-SB-0017-16
May 27, 2016
MIL "ON" P125D71 – Fuel Flow Control Valve Stuck
Service
Category
Engine/Hybrid System
Section
Fuel System
Market USA
Applicability
YEAR(S)
MODEL(S)
ADDITIONAL INFORMATION
2015 - 2016
NX200T
Drive Type(s): 4WD, 2WD
Introduction
Some 2015 – 2016 model year NX 200t vehicles may exhibit a MIL “ON” condition with
Diagnostic Trouble Code (DTC) P125D71 (Fuel Flow Control Valve Performance Actuator Stuck).
Some vehicles may also enter “limp mode” and the Multi-Informational Display (MID) will tell the
customer “reduced engine power – take vehicle to nearest dealer”. Follow the procedures in this
bulletin to address this condition.
Production Change Information
This bulletin applies to vehicles produced BEFORE the Production Change Effective VINs
shown below.
MODEL
PLANT
NX200T
TMK
DRIVETRAIN
PRODUCTION CHANGE EFFECTIVE VIN
FF/F-Sport
JTJYARBZ#G2039757
AWD/F-Sport
JTJBARBZ#G2079953
Warranty Information
OP CODE
DESCRIPTION
TIME
OFP
T1
T2
EG1604
R & R of Sub-Tank, Fuel, No. 1 and PDV
2.5
77131-78010
8A
99
APPLICABLE WARRANTY
This repair is covered under the Lexus Federal Emission Warranty. This warranty is in effect for
months or 48 or 50,000 miles, whichever occurs first, from the vehicle’s in-service date.
Warranty application is limited to occurrence of the specified condition described in
this bulletin.
© 2016 Lexus, a division of Toyota Motor Sales, USA
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L-SB-0017-16
May 27, 2016
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MIL "ON" P125D71 – Fuel Flow Control Valve Stuck
Parts Information
PART NUMBER
PART NAME
QTY
Sub-Tank, Fuel, No. 1
1
77024-78020
Plate, Sub Assy
1
23990-36010
Valve Assy, Pressure Discharge
1
90301-08019
90301-04013
90301-15024
Ring, O
1
PREVIOUS
NEW
77131-78010
77131-78011
Required Tools & Equipment
REQUIRED EQUIPMENT
SUPPLIER
Techstream 2.0*
Techstream Lite
PART NUMBER
QTY
TS2UNIT
ADE
Techstream Lite (Green Cable)
TSLITEPDLR01
TSLP2DLR01
* Essential SST.
NOTE
Only ONE of the Techstream units listed above is required.
Software version 11.10.034 or later is required.
Additional Techstream units may be ordered by calling Approved Dealer Equipment (ADE)
at 1-800-368-6787.
Repair Procedure
1. Using Techstream, confirm the following DTC is present:
P125D71: Fuel Flow Control Valve Performance Actuator Stuck
Is DTC P125D71 Present?

YES — Go to step 2.

NO — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.
© 2016 Lexus, a division of Toyota Motor Sales, USA
1
L-SB-0017-16
May 27, 2016
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MIL "ON" P125D71 – Fuel Flow Control Valve Stuck
Repair Procedure (Continued)
2. Perform Active Test using Techstream (Powertrain – Engine – Active Test – Activate the Fuel
Pressure Discharge).
Does the fuel pressure fluctuate by at least 4 psig?

YES — This bulletin does NOT apply. Continue diagnosis using the applicable
Repair Manual.

NO — Go to step 3.
3. Perform Health Check and clear all DTCs.
4. Remove the fuel tank assembly.
Refer to the Technical Information System (TIS), applicable model and model year
Repair Manual:

2015 / 2016 NX 200t:
Engine/Hybrid System – Fuel System – “8AR-FTS Fuel: Fuel Tank: Removal”
5. Remove the fuel pump assembly.
Refer to TIS, applicable model and model year Repair Manual:

2015 / 2016 NX 200t:
Engine/Hybrid System – Fuel System – “8AR-FTS Fuel: Fuel Pump: Removal”
6. Disassemble the fuel pump assembly.
Refer to TIS, applicable model and model year Repair Manual:
 2015 / 2016 NX 200t:
Engine/Hybrid System – Fuel System – “8AR-FTS Fuel: Fuel Pump: Disassembly”
© 2016 Lexus, a division of Toyota Motor Sales, USA
L-SB-0017-16
May 27, 2016
Page 4 of 4
MIL "ON" P125D71 – Fuel Flow Control Valve Stuck
Repair Procedure (Continued)
7. Remove the pressure discharge valve from
the fuel suction plate sub-assembly.
Figure 1.
A. Disconnect the connector from the
pressure discharge valve assembly.
B. Detach the 2 claws and pressure
discharge valve assembly from the fuel
suction tube assembly with pump.
1
Claw locations
8. Install the new pressure discharge valve and attach the 2 claws and pressure discharge valve
assembly to the fuel suction tube assembly with pump.
9. Reassemble the fuel pump with the new Sub-Tank, plate and applicable O-Rings.
Refer to TIS, applicable model and model year Repair Manual:

2015 / 2016 NX 200t:
Engine/Hybrid System – Fuel System – “8AR-FTS Fuel: Fuel Pump: Reassembly”
10. Install the fuel pump assembly into the fuel tank.
Refer to TIS, applicable model and model year Repair Manual:

2015 / 2016 NX 200t:
Engine/Hybrid System – Fuel System – “8AR-FTS Fuel: Fuel Pump: Installation”
11. Install the fuel tank assembly.
Refer to TIS, applicable model and model year Repair Manual:

2015 / 2016 NX 200t:
Engine/Hybrid System – Fuel System – “8AR-FTS Fuel: Fuel Tank: Installation”
12. Complete the Confirmation Driving Pattern to confirm the DTC is no longer present.
Refer to TIS, applicable model and model year Repair Manual:

2015 / 2016 NX 200t:
Engine/Hybrid System – Engine Control – “8AR-FTS ENGINE CONTROL:
SFI SYSTEM: P125D71”
© 2016 Lexus, a division of Toyota Motor Sales, USA