Service Bulletin
September 5, 2015

13-080
52148-02140 Version 4

Warranty Extension: MIL Comes On With DTCs P0301 thru P0304
Supersedes 13-080, dated August 15, 2014, to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year
2008–10

Model
Odyssey

Trim
EX-L, Touring

VIN Range
Check the iN VIN Status for Eligibility

REVISON SUMMARY
All Sections were revised; American Honda recommends that you review the entire bulletin.
CORRECTIVE ACTION
Complete the diagnosis procedure and if necessary, update the PCM software and replace the affected spark
plugs (Procedure A). If the vehicle returns after the updated PCM software has been installed, clean the
pistons and replace the pistons rings along with the spark plugs (Procedure B).
NOTE: Make sure the software update has been completed, spark plugs replaced (Procedure A), and the
vehicle returned to the customer before making any additional repairs. Failure to do so will result in claim
review by your DPSM and possible debit.
BACKGROUND
American Honda is announcing a powertrain warranty extension as a result of a settlement of a class action captioned,
Soto et al.v. American Honda Motor Co., Inc., Case No. 3:12-cv-1377-SI (N.D. Cal.).
The piston rings on certain cylinders may rotate and align which can lead to spark plug fouling. 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.
American Honda is extending the powertrain warranty to cover repairs related to engine misfire (that triggers DTCs
P0301 through P0304) to 8 years with unlimited mileage from the original date of purchase and has settled a class
action based on this remedial measure.
This warranty extension does not apply to any vehicle that has ever been declared a total loss or sold for salvage by a
financial institution or insurer, or has a branded or similar title under any state’s law.
CUSTOMER NOTIFICATION
Owners of affected vehicles were sent a class action settlement notice regarding this warranty extension starting in
October 2013.
Before doing work on a vehicle, verify its eligibility by doing an iN VIN status inquiry.
Refer customers seeking information about settlement benefits to www.enginemisfiresettlement.com, or instruct them to
call 888-888-3082.

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.
© 2015 American Honda Motor Co., Inc. – All Rights Reserved

Page 1 of 23

DIAGNOSIS
1. Connect the HDS and check for the following 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.
Are any of these DTCs stored?
YES – Go to step 2.
NO – Stop. This bulletin does not apply. Continue with normal troubleshooting.
2. Remove and check the spark plug(s) on the affected cylinders (example: if P0301 is stored, check the spark plug on
cylinder No. 1).
Are the spark plug(s) fouled?
YES – Go to step 3.
NO – Stop. This bulletin does not apply. Continue with normal troubleshooting.

Page 2 of 23

3. Check the PCM software version P/N located above the PGM FI Data List.

Year/Model

Program ID (or later)

Program P/N (or later)

2008 Odyssey (EX-L, Touring)

GWA950

37805-RGW-A95

2009–10 Odyssey (EX-L, Touring)

GWA050

37805-RGW-A05

Is the PCM Program ID and/or Program P/N the same or newer than what is listed above?
NO – The PCM software needs to be updated. Go to REPAIR PROCEDURE A.
YES – The correct software is installed. The piston rings on select cylinders need to be replaced. Go to step 4.
IMPORTANT NOTICE: The PCM software must first be updated with the correct version, spark plugs replaced
and the vehicle returned to the customer. Piston cleaning and piston ring replacement, as described below,
should only be done after the customer has returned with a second failure or if the vehicle’s software is the
correct version. Failure to follow this process correctly may result in a full debit of the warranty claim to
your dealer.
4. Note which DTCs are stored in the vehicle.
Does the vehicle have DTC P0304 stored? (Any combination of DTCs P0301, P0302, P0303, P0304 may also
be stored.)
YES – Go to REPAIR PROCEDURE B for the cylinders listed, Cylinders 1–4: Clean the pistons, replace the
piston rings, and replace the spark plugs.
NO – Go to REPAIR PROCEDURE B for the cylinders listed below:
• Cylinder 1–3: Clean the pistons and replace the pistons rings.
• Cylinder 1–4: Replace the spark plugs.

Page 3 of 23

WARRANTY CLAIM INFORMATION
PROCEDURE NOTICE: The PCM software must first be updated with the correct version, spark plugs replaced and
the vehicle returned to the customer (Procedure A). Piston cleaning and piston ring replacement along with the
spark plugs should only be done after the customer has returned with a second failure or if the vehicle’s software is
the correct version (Procedure B). Failure to follow this process correctly may result in a full debit of the
warranty claim to your dealer.
FLAT RATE NOTE: The procedure in this bulletin is different than the service manual. This procedure does not
require the complete removal of the power steering pump, catalytic converter(s), engine and transmission, or the
crankshaft. As a result, the operation number is unique and the FRT is reduced (Procedure B).
2008–10 Odyssey
OP#
1171G9

1171H0

1171H0B

Description

Flat Rate
Time

Template
ID

2008–10 Odyssey: Procedure A
Update the PCM and replace spark plugs 1–4
(includes diagnosis).

0.5 hr

13-080A

2008–10 Odyssey: Procedure B
Replace piston rings 1–3 and replace spark plugs 1–4
(includes diagnosis).

8.5 hrs

13011–R70–A02

2008–10 Odyssey: Add if replacing piston rings on cylinder 4.

0.8 hrs

13011–R70–A02

Defect Code:

Failed Part Number

13011–R70–A02

5V500

Symptom Code: JC000
Skill Level: Repair Technician
PARTS INFORMATION
NOTE: Do the DIAGNOSIS first to determine which cylinders you will need to repair.
REPAIR PROCEDURE A – SOFTWARE UPDATE AND CYLINDERS 1–4 SPARK PLUG REPLACEMENT
Required Parts for Repair Procedure A
Part Name
Spark Plug

Part Number

Quantity

12290-R70-A01

4

Page 4 of 23

REPAIR PROCEDURE B – PISTON CLEANING AND RING REPLACEMENT
Required Parts
Part Name

Part Number

Cyl. Gasket (Fr)
Cyl. Gasket (Rr)
Drain Washer 14 mm
EGR Pipe Gasket A
EGR Pipe Gasket B
Ex. Chamber Gasket
Ex. Pipe Gasket
Head Gasket Fr. (Valve Cover)
Head Gasket Rr. (Valve Cover)
In. Manifold Gasket (Top Cover)
In. Manifold Gasket (Base)
Oil Filter
O-ring (7.47 mm x 3.6 mm)
O-ring (31.2 mm x 4.1 mm)
Piston Ring Set
Pre-chamber Gasket
Self-locking Nut (8 mm)
Self-locking Nut (10 mm)
Spark Plug
Strainer O-ring
Timing Belt Bolt
Water Gasket Fr.
Water Gasket Rr.

Cyl 1-3

12251-R70-A01
12261-R70-A01
94109-14000
18716-R70-A01
18719-R70-A01
18115-R70-A01
18212-SA7-003
12030-R70-A00
12050-R70-A00
17146-R70-A01
17105-RCA-A01
15400-PLM-A02
91301-PLC-000
91314-PH7-003
13011-5G0-A02
18393-SDB-A00
90212-RCA-A01
90212–SA5-003
12290-R70-A01
15221-RYE-A01
14551-RCA-A01
19411-P8A-A03
19412–P8A-A02

Cyl 1-4

1
1
1
1
2
2
3
1
4
9
4
1
1
1
1

1
1
1
1
1
2
2
1
1
1
1
1
2
2
4
1
8
9
4
1
1
1
1

1
1
1
1
1
2

Replaced Parts as Needed for Repair Procedure B
Part Name

Part Number

Cyl 1-3

Cyl 1-4

Connecting Rod Bolt (May require up to 8 bolts
per cylinder head)
Washer-Bolt (12 x 163) (May require up to 8
bolts per cylinder head)

13204–P8A–A01

6

8

90005–PAA–A01

8

8