NHTSA ID Number: 11028515
Manufacturer Communication Number: A26-001
TSB/Document Date: 2026-02-06
Summary
Service Bulletin - The piston ring function deteriorates due to ring low wear toughness and sticking from sludge. Oil adheres to the spark plug leading to carbon fouling and misfire. This can set DTCs P0301 No. 1 cylinder misfire detected, P0302 No. 2 cylinder misfire detected, P0303 No. 3 cylinder misfire detected, P0304 No. 4 cylinder misfire detected, and cause the MIL to come on.
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TSB/Document ID: A26-001
Replacement Service Bulletin Number:
MFR Communication Date: 2026-02-01
MFR Internal Campaign ID/Software Version:
Communication Type: Service Bulletin/Repair Instructions
NHTSA Components: ENGINE
MFR Component System:
MFR Component Subsystem:
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Part Name
Quantity
Cyl 1-3
Cyl 1-4
Timing Belt Bolt
14551-RCA-A01
1
1
Water Gasket Fr.
19411-P8A-A03
1
1
Water Gasket Rr.
19412–P8A-A02
1
1
Optional Parts for Repair Procedure A Based on Measurements
Part Name
Part Number
Quantity
Cyl 1-3
Cyl 1-4
Connecting Rod Bolt (may require up to 2 bolts per
connecting rod) (Repair Procedure A Only)
13204-P8A-A01
6
8
Washer-Bolt (12 x 163) (may require up to 8 bolts per
cylinder head) (Repair Procedure A Only)
90005-PAA-A01
8
16
Repair Procedure B: Engine Short Block Replacement
NOTE: Includes parts from Repair Procedure A parts list.
Part Name
Part Number
Quantity
Intake Cover Gasket
17146-R70-A01
1
Intake Manifold Gasket
17105-RCJ-A01
1
Water Gasket Fr.
19411-P8A-A03
1
Water Gasket Rr.
19412–P8A-A02
1
18115-R70-A01 or
18115-5G0-A01
2
15400-PLM-A02
1
Nut, Self-Locking (Catalytic Convertor)
90212-RCA-A01
8
Washer, Sealing (24 mm) (6AT Fill Plug Washer)
11107-PWA-300
1
Washer, Drain Plug (18 mm) (6AT Drain Plug Washer)
90471-PX4-000
1
Washer, Drain Plug (20 mm) (5AT Drain Plug Washer)
94109-20000
1
Gasket, Prechamber
18393-SDB-A00
1
Gasket, Exhaust Pipe
18212-SA7-003
2
Nut, Self-Lock (10 mm) (Exhaust pipe A nuts)
90212-SA5-003
9
Bolt, Flange (Side Mount Bolt to Frame Bracket)
90163-SDA-A01
2
Bolt, Flange (Side Engine Mount Bolts)
90164-SHJ-A00
2
Bolt, Flange (12 x 115) (side engine mount bolt)
90161-SZA-A00
1
Bolt, Flange (10 x 20) (Front & Rear engine mount bolts)
90163-S5A-000
8
Catalytic Converter Gasket
Page 5 of 65
Repair Procedure B: Engine Short Block Replacement – cont.
NOTE: Includes parts from Repair Procedure A parts list.
Part Name
Part Number
Quantity
Nut, Flange (12 mm) (Front & Rear Engine Mount
Stopper Nuts)
90371-SAA-010
4
Bolt, Flange (10 x 75) (Rear Engine Mount Bolts)
95701-12065-08
2
Bolt, Flange (10 x 50)
95701-10050-08
4
Bolt, Flange (10 x 120)
95801-10120-08
2
Bolt, Flange (10 x 30) (Front Engine Mount Bracket Bolts)
90163-SDB-A00
3
Bolt, Flange (12 x 83) (Rear Engine Mount Bracket Bolts)
90163-SHJ-A00
4
O-RING (14.4 x 1.9) (P.S Line)
91370-TA0-000
1
91301-PLC-000
2
Starter Motor Gasket
31270-RJA-A01
1
Gasket A, EGR Pipe (EGR Pipe Gasket)
18716-R70-A01
1
Gasket B, EGR Pipe (EGR Pipe Gasket)
18719-R70-A01
1
Gasket, Rear Cylinder (Head Gasket)
12261-R70-A01
1
Gasket, Front Cylinder (Head Gasket)
12251-R70-A01
1
Head Gasket Fr. (Valve Cover)
12030-R70-A00
1
Head Gasket Rr. (Valve Cover)
12050-R70-A00
1
O-Ring (O-rings for coolant pipe)
91314-PH7-003
2
Timing Belt Bolt
14551-RCA-A01
1
Bolt, Timing Belt Adjuster
14513-RCA-A01
1
Bolt, Flange (Strut to Knuckle)
90119-SHJ-A00
4
Nut, Flange (Strut to Knuckle)
90382-SP0-003
4
Bolt, Flange (Special Bolt, Subframe)
90165-TK8-A00
4
Bolt, Flange (Special Bolt; Rear Subframe Bolt)
90161-SHJ-A00
2
Bolt, Flange (12 x 28) (Subframe Bracket Bolt)
90181-SK3-E00
2
O-Ring (15 x 1.9) (CKP O-ring)
91333-PNA-003
1
O-Ring (8.8 x 2.4)
15142-P8A-A00
2
Engine Short Block (2013-2017)
10002-RV0-305
1
12290-R71-L01
4
Page 6 of 65
Optional Parts for Repair Procedure B Based on Measurements
Part Name
Washer-Bolt (12 x 163) (may require up to 8 bolts per
cylinder head)
Part Number
90005-PAA-A01
Quantity
Cyl 1-3
Cyl 1-4
8
16
REQUIRED MATERIALS
Repair Procedure A
Part Name
Honda Long-Life Antifreeze/Coolant Type 2
Part Number
Quantity
08CLA-P99-0F0A8
3 gallons
Full Synthetic Engine Oil 0W-20 Oil
08798–9163
6 quarts
Hondabond HT (1 Tube Repairs 5 Vehicles)
08718–0004
1 tube
Genuine Honda Throttle Plate Cleaner
08700–TPCB
1
Nylon Parts Cleaning Brush
(commercially available)
5/16 ID Flexible Hose (Block Drain)
(commercially available)
Repair Procedure B
Part Name
Part Number
Quantity
08CLA-P99-0F0A8
3 gallons
Full Synthetic Engine Oil 0W-20 Oil
08798–9163
6 quarts
Power steering Fluid (12oz)
08206-9002
1
ATF-DW1
08200-9008
4
Hondabond HT (1 Tube Repairs 10 Vehicles)
08718–0004
1 tube
(commercially available)
1
Honda Long-Life Antifreeze/Coolant Type 2
5/16 ID Flexible Hose
Page 7 of 65
TOOL INFORMATION
Repair Procedure A
Tool Name
Part Number
Quantity
Piston Ring Groove Cleaner
07AAZ-TA5A100
1
Cylinder Wall Inspection Tool
07AAJ-R70A301
1
LIL50210
1
Snap-On PRS8 or equivalent
1
SCP1287 or equivalent
1
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