Service Bulletin

23-009

July 7, 2025

Version 2

Warranty Extension: Engine Does Not Auto Restart After Entering Auto
Idle Stop
Supersedes Version 1, dated January 6, 2023, to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year

Model

Trim

VIN Range

2019–21

Passport (with 9AT)

ALL (with Idle Stop)

Check the iN VIN status for eligibility.

2016–21

Pilot (with 9AT)

ALL (with Idle Stop)

Check the iN VIN status for eligibility.

2020–21

Ridgeline (with 9AT)

ALL (with Idle Stop)

Check the iN VIN status for eligibility.

REVISION SUMMARY
•
•

Under BACKGROUND, information was added.
Under INSPECTION PROCEDURE, information was removed.

BACKGROUND
Under certain circumstances, after coming to a stop and engaging idle stop, the vehicle may not restart automatically
due to excessive cylinder pressure and/or low cranking torque. Typically, the customer can immediately restart the
vehicle by selecting Park and pressing the ENGINE START/STOP button.
NOTE: If 23-008 Product Update: PGM-FI Idle Stop Software Update is applicable to the VIN, the PGM-FI software must
be updated first before the warranty extension applies.
Honda is extending the warranty coverage for valve adjustment and starter replacement related to this condition to 10
years from the original date of purchase with no mileage limitation.
Honda is also implementing an additional eighteen (18) month period for 2016 model year Honda Pilot vehicles,
commencing at the expiration of the 10 year warranty extension period for each vehicle, for valve adjustment and starter
replacement related to this condition under warranty.
CUSTOMER NOTIFICATION
Owners of affected vehicles will be sent a notification of this campaign.
Do an iN VIN status inquiry to verify eligibility.
CORRECTIVE ACTION
Replace the starter assembly, starter relays and adjust the valves.

CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment, and
training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not assume
this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact an
authorized Honda automobile dealer.
©

2025 American Honda Motor Co., Inc. — All Rights Reserved

Page 1 of 19

PARTS INFORMATION
Part Name

Part Number

Quantity

Intake Manifold Gasket

17101-RLV-A01

6

Throttle Body Gasket

17102-RLV-A01

1

EGR Seal

17103-RLV-A01

2

EGR Pipe Gasket A

18716-RB0-G01

1

Starter Motor Assembly

31200-5J2-A53

1

Flange Bolt (12x120)

90051-5J4-000

1

Flange Bolt (12x45)

90165-SDA-A00

2

Starter Cut Relay

39794-T5A-J01

2

NOTE: If 23-008 Product Update: PGM-FI Idle Stop Software Update is applicable to the VIN, the PGM-FI software must
be updated first before the warranty extension applies. Any warranty extension claims submitted prior to an approved
Product Update will be debited.
REQUIRED MATERIALS
Part Name

Part Number

Quantity

Hondabond (one tube repairs 4 vehicles)

08718-0004

1

Part Name

Part Number

Quantity

Relay Puller

07AAC-000A2A1

1

TOOLS INFORMATION

Page 2 of 19

WARRANTY CLAIM INFORMATION
Passport:
Operation
Number

Description

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

1181FF

3.0 hr
Replace the starter,
starter relays and adjust
the valves.

6T600

XCT00

A23009A

31200-5J2-A53

Operation
Number

Description

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

1181FF

2.8 hr
Replace the starter,
starter relays and adjust
the valves.

6T600

XCT00

A23009B

31200-5J2-A53

Operation
Number

Description

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

1181FF

2.9 hr
Replace the starter,
starter relays and adjust
the valves.

6T600

XCT00

A23009C

31200-5J2-A53

Flat Rate
Time

Pilot:
Flat Rate
Time

Ridgeline:
Flat Rate
Time

INSPECTION PROCEDURE
Does 23-008 Product Update: PGM-FI Idle Stop Software Update apply to the VIN?
Yes – Confirm 23-008 Product Update: PGM-FI Idle Stop Software Update is closed by checking the VIN inquiry.
• If closed, proceed to the repair procedure.
• If open, do 23-008 Product Update: PGM-FI Idle Stop Software Update. The repair is complete.
No – Proceed to the repair procedure.

Page 3 of 19

REPAIR PROCEDURE
Starter Removal and Installation
1. Remove the front bulkhead cover.

2. Remove the engine cover.

3. Remove the air intake duct.
4. Remove the air intake tube.

Page 4 of 19

5. Remove the air cleaner.

6. Disconnect the 12 volt battery.
NOTE: Do not disconnect the 12 volt battery sensor from the negative terminal.

Page 5 of 19

7. Remove the 12 volt battery setting plate, and the 12 volt battery.

8. Disconnect the battery fan motor, and remove the battery box.

Page 6 of 19

9. Remove the harness holder.
10. Remove the skid block.

11. Remove the harness clamp, disconnect the positive cable, cable connector, and starter.

12. Reinstall the parts in reverse order of removal.
NOTE: Do not install the front bulkhead cover, engine cover, air intake tube, and air intake duct at this time.
13. Replace start cut relay 1 and starter cut relay 2.
14. Connect the HDS to the DLC.
15. Turn the vehicle to the ON mode.
16. Make sure the HDS communicates with the vehicle, then select IDLE STOP STARTER COUNTER CLEAR in the
ADJUSTMENT MENU with the HDS.

Page 7 of 19

Valve Clearance Adjustment
1. Disconnect the front secondary HO2S connector.

2. Disconnect the connectors and EVAP purge hose. Move the throttle body with the water bypass hoses connected.
NOTE: The throttle body gasket is a must replace item.

Page 8 of 19

3. Disconnect the PCV hose and the brake booster vacuum hose.

4. Remove the EGR pipe B.

Page 9 of 19

5. Remove the upper cover mounting bolts and nuts sequentially in three steps. Remove the intake manifold.

6. Remove the ignition coils and the positive alternator cable.

7. Disconnect the rocker arm oil pressure sensor.
8. Remove the harness holders on both cylinder heads.

Page 10 of 19

9. Remove the cylinder head covers.
NOTE: Connect the HDS to the DLC and monitor ECT SENSOR 1. When the engine has cooled down and the
coolant temperature is less than 100°F (38°C), adjust the valve clearance.
10. Set the No. 1 piston at top dead center (TDC). Align the pointer on the front upper cover with the No. 1 piston TDC
mark on the front camshaft pulley.

Page 11 of 19

11. Select the correct feeler gauge for the valve clearance you are going to check.
Valve Clearance Spec:
• Intake: 0.20-0.24 mm (0.008-0.009 in)
• Exhaust: 0.28-0.32 mm (0.011-0.012 in)
For this repair, you will set the valve clearance to these specs:
• Intake .22 mm
• Exhaust .30 mm

12. Insert the feeler gauge between the adjusting screw and the end of the valve stem on the No. 1 cylinder and slide it
back and forth; you should feel a slight amount of drag.

13. If you feel too much or too little drag, loosen the locknut, then turn the adjusting screw until the drag on the feeler
gauge is correct.

Page 12 of 19

14. While holding the adjusting screw with the screwdriver, tighten the locknut, then recheck the clearance. Repeat the
adjustment, if necessary.
Specified Torque:
Intake: 20 N·m (15 lb-ft)
Exhaust: 20 N·m (15 lb-ft)
Apply new engine oil to the nut threads.

15. Rotate the crankshaft clockwise. Align the pointer on the front upper cover with the No. 4 piston TDC mark on the
front camshaft pulley.

Page 13 of 19

16. Check, and if necessary, adjust the valve clearance on the No. 4 cylinder.

17. Rotate the crankshaft clockwise. Align the pointer on the front upper cover with the No. 2 piston TDC mark on the
front camshaft pulley.

Page 14 of 19

18. Check, and if necessary, adjust the valve clearance on the No. 2 cylinder.

19.Rotate the crankshaft clockwise. Align the pointer on the front upper cover with the No. 5 piston TDC mark on the
front camshaft pulley.

Page 15 of 19

20. Check, and if necessary, adjust the valve clearance on the No. 5 cylinder.

21. Rotate the crankshaft clockwise. Align the pointer on the front upper cover with the No. 3 piston TDC mark on the
front camshaft pulley.

Page 16 of 19

22. Check, and if necessary, adjust the valve clearance on the No. 3 cylinder.

23. Rotate the crankshaft clockwise. Align the pointer on the front upper cover with the No. 6 piston TDC mark on the
front camshaft pulley.

Page 17 of 19

24.Check, and if necessary, adjust the valve clearance on the No. 6 cylinder.

25. Check the spark plug seals for damage. If any seals are damaged, replace them.
26. Thoroughly clean the head cover gasket, and the groove of the cylinder head cover.
NOTE: Check and if necessary, replace the head cover gasket.
27. Install the head cover gasket in the groove of the cylinder head cover. Make sure the head cover gasket is seated
securely.
28. Remove all of the old liquid gasket from the front, and rear rocker arm oil control valve mating surfaces then apply
new liquid gasket.

29. Set the spark plug seals on the spark plug tubes, and install the front and rear cylinder head cover.

Page 18 of 19

30. Inspect the spark plug seals for damage.
31. Reinstall the remaining parts in the reverse order of removal.
•
•
•

When installing the intake manifold, make sure to tighten the bolts/nuts in three steps.
When installing the throttle body, tighten in a cross pattern in three steps.
When installing the intake air duct do not over-tighten the hose band screw.

Page 19 of 19