A13-078

Service Bulletin
February 03, 2018
13-078
08190 Version 8
Warranty Extension: MIL Comes On with DTCs P0301 thru P0304
Supersedes 13-078, dated May 18, 2016, to revise the information highlighted in yellow.
AFFECTED VEHICLES
Year
2008–12
Model
Accord
Trim
All V6 A/T
VIN Range
Check the iN VIN Status for Eligibility.
REVISON SUMMARY
Additional NOTES added under REPAIR PROCEDURE.
CORRECTIVE ACTION
2008–11 Models: Complete the diagnosis procedure and if necessary, update the PCM software and replace the
affected spark plugs. If the vehicle returns after the updated PCM software and spark plug replacement have
been installed, clean pistons and replaced 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.
2012 Models: Complete the diagnosis procedure and if necessary, clean the pistons and replace the pistons rings
along with the spark plugs (Procedure B).
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.
© 2018 American Honda Motor Co., Inc. – All Rights Reserved
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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.
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3. Check the PCM software version P/N located above the PGM FI Data List. All 2012 vehicles are up to date, go
directly to step 4.
Year/Model
Program ID (or later)
Program P/N (or later)
2008–09 Accord (KA-ULEV)
70A630
37805-R70-A63
2008–09 Accord (KL-SULEV-PZEV)
71L630
37805-R71-L63
2010 Accord (KA-ULEV)
70A750
37805-R70-A75
2011 Accord 2-Door (KA-ULEV)
70A830
37805-R70-A83
2011 Accord 4-Door (KA-ULEV)
84A530
37805-R84-A53
2012 Accord (ALL)
Software Updated from Factory
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, replace spark plugs
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.
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WARRANTY CLAIM INFORMATION
2008–11 Models: Confirm PCM software is or has been updated with the correct version, spark plugs 1–4 have
been replaced and the vehicle returned to the customer (Procedure A). Piston cleaning and piston ring
replacement 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.
2012 Models: Are equipped with updated software from factory, no software updated is needed. Piston cleaning
and piston ring replacement along with spark plugs 1–4 should performed (Procedure B).
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 Accord
OP#
1171G9
1171G9
1171H0
Description
Flat Rate Time
Template ID
Failed Part Number
2008–10 Accord (KA): Procedure A
Update the PCM and replace spark plugs
1–4 (includes diagnosis).
0.5 hr
13-078A
13011–R70–A02
2008–10 Accord (KL): Procedure A
Update the PCM and replace spark plugs
1–4 (includes diagnosis).
0.5 hr
13-078B
13011–R70–A02
2008–10 Accord: Procedure B
Replace piston rings 1–3 and replace spark plugs
1–4 (includes diagnosis).
6.2 hrs
13011–R70–A02
0.8 hrs
13011–R70–A02
1171H0B 2008–10 Accord:
Add if replacing piston rings on cylinder 4.
2011–12 Accord
OP#
1171G9
1171H0
Description
Flat Rate Time
Template ID
Failed Part Number
2011 Accord: Procedure A
Update the PCM and replace spark
plugs 1–4 (includes diagnosis).
0.5 hr
13-078C
13011–5G0–A01
2011–12 Accord: Procedure B
Replace piston rings 1–3 and replace spark plugs 1–4
(includes diagnosis).
6.2 hrs
13011–5G0–A01
0.8 hrs
13011–5G0–A01
1171H0B 2011–12 Accord:
Add if replacing piston rings on cylinder 4.
Defect Code:
5V500
Symptom Code: JB600
Skill Level:
Repair Technician
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PARTS INFORMATION
NOTE: Do the DIAGNOSIS first to determine which cylinders you will need to repair.
REPAIR PROCEDURE A – SOFTWARE UDPATE AND CYLINDERS 1–4 SPARK PLUG REPLACEMENT
Required Parts
Part Name
Spark Plugs (KA)
Spark Plugs (KL)
Part Number
Quantity
12290-R70-A01
12290-R71-L01
4
4
REPAIR PROCEDURE B – PISTON CLEANING AND RING REPLACEMENT
Required Parts
Part Name
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
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 Plugs (KA)
Spark Plugs (KL)
Strainer O-ring
Timing Belt Bolt
Water Gasket Fr.
Water Gasket Rr.
Part Number
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-RCJ-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
12290-R71-L01
15221-RYE-A01
14551-RCA-A01
19411-P8A-A03
19412–P8A-A02
Cyl 1-3
1
1
1
1
1
2
1
1
1
1
2
2
3
1
4
9
4
4
1
1
1
1
Cyl 1-4
1
1
1
1
1
2
2
1
1
1
1
1
2
2
4
1
8
9
4
4
1
1
1
1
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Replace Parts as Needed for Repair Procedure B
Part Name
Connecting Rod Bolt (may require up to 6 bolts per
cylinder head)
Washer-Bolt (12 x 163) (may require up to 8 bolts per
cylinder head)
Part Number
Cyl 1-3
Cyl 1-4
13204–P8A–A01
6
8
90005–PAA–A01
8
16
REQUIRED MATERIALS – REPAIR PROCEDURES B
Material Description
Honda Long-Life Antifreeze/Coolant Type 2
Genuine Honda Motor Oil 0W–20
Genuine Honda Motor Oil 5W-20 (If requested 2008–10)
Hondabond HT (1 Tube repairs 5 vehicles)
Genuine Honda Throttle Plate Cleaner
Nylon Parts Cleaning Brush
5/16 ID Flexible Hose
Part Number
Quantity
OL999–9011
08798–9036
08798–9032
08718–0004
08700–9204
(commercially available)
(commercially available)
3 gallons
6 quarts
6 quarts
1 tube
TOOL INFORMATION – REPAIR PROCEDURE B
Tool Description
Tool Number
Quantity
Piston Ring Groove Cleaner
07AAZ–TA5A100
1
REPAIR PROCEDURE A – SOFTWARE UDPATE AND CYLINDERS 1–4 SPARK PLUG REPLACEMENT
1. For 2008–11 models only, update the PCM software. Refer to Service Bulletin 01-023, Updating Control
Units/Modules.
2. Replace spark plugs on cylinders 1–4, then return the vehicle to the customer.
REPAIR PROCEDURE B – PISTON CLEANING AND RING REPLACEMENT
2008–11 Models: Confirm PCM software is or has been updated with the correct version, spark plugs 1–4 have been
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 vehicles 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.
2012 Models: Are equipped with updated software from the factory, no software update is needed. Piston cleaning and
piston ring replacement, along with the spark plugs should only be done after the diagnosis of spark plugs has concluded
that (Procedure B) is required.
The following service manual procedures have been used in full or in part within this service bulletin. For more detail on
these procedures, and torque specifications for some components, refer to the appropriate electronic service manual.
•
Battery Terminal Disconnection and Reconnection
•
Fuel Pressure Relieving
•
Fuel Line/Quick-Connect Fitting Removal
•
Air Cleaner Removal/Installation
•
Splash Shield Replacement
•
Drive Belt Removal/Installation
•
Engine Oil Replacement
•
Coolant Replacement
•
Hydraulic Power Steering Fluid Check/Replacement
•
Intake Manifold Removal and Installation
•
Timing Belt Removal and Installation
•
Warm Up-TWC Removal/Installation
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•
Cylinder Head Cover Removal
•
Cylinder Head Removal and Installation
•
Piston Ring Replacement
•
PCM Idle Learn Procedure
•
Valve Adjustment
Piston Removal Procedure
•
Use fender covers to avoid damaging painted surfaces.
•
To avoid damaging any wires and terminals, unplug the circuit connectors carefully while holding the connector
portion.
•
Mark all the circuits and hoses to avoid misconnection. Make sure they do not contact other circuit wiring, hoses, or
interfere with other parts.
1. Using both hood support struts, prop up the hood in a wide-open position.
2. Relieve the fuel pressure.
3. Remove both front wheels so you can fully lower the vehicle.
4. Remove the strut brace.
5. Do the battery removal procedure.
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6. Disconnect the fuel feed hose line at the bulkhead.
7. Remove the engine cover.
8. Remove the radiator cap.
9. Raise the vehicle.
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10. Remove the front splash shield.
11. Drain the engine oil.
12. Loosen the drain plug on the radiator, and drain the coolant.
13. Install a 5/16th inner diameter rubber hose on the drain bolt at the rear of the engine block, loosen the drain bolt,
and drain all remaining coolant. Then, disconnect the oil pressure switch connector.
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14. Remove exhaust pipe A.
15. Depending on the diagnosis, remove the appropriate WU-TWC support bracket bolts.
16. Remove the EGR lower pipe nuts.
17. Remove the crankshaft pulley bolt, but not the pulley.
NOTE: Make sure to apply new oil to the bolt flange and threads before reinstallation.
18. Lower the vehicle.
19. Disconnect the MAP sensor connector and the breather pipe, then remove the intake air duct.
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20. Disconnect the throttle body connector, the EVAP canister purge valve connector, the EVAP hose, the brake
booster vacuum hose, and the vacuum hose.
21. Disconnect and plug the water bypass hoses.
22. Remove the drive belt.
23. Remove the drive belt auto-tensioner.
24. Remove the power steering pump bolts, the power steering bracket then secure the power steering pump out of the
way.
NOTE: Do not remove any of the hoses.
25. Remove the engine harness holder bolt on the side engine mount.
26. Set the engine to TDC cylinder one.
27. Remove the crankshaft pulley.
28. Remove the timing belt.
29. Remove the timing belt idler pulley.
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30. Remove the engine intake upper cover bolts and nuts. Then remove the cover and the PCV hose.
31. Remove the intake manifold bolts and nuts in three steps, then remove the intake manifold.
32. Remove the ECM/PCM cover.
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33. Remove the PCM connectors and harness clip. Remove the battery cables from the underhood fuse box.
34. Remove the appropriate Ignition coils based on the diagnosis.
NOTE: Depending on the diagnosis, you will either have to remove the rear bank ignition coils or both ignition coil
banks.
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35. Depending on the diagnosis, remove some or all of the following components:
• ECT sensor connector
• Front rocker arm oil pressure switch connector
• Rear rocker arm oil pressure switch connector
• CMP sensor connector
• Front A/F sensor one connector
• Rear A/F sensor one connector
• Front secondary HO2S connector
• Rear secondary HO2S connector
• Rocker arm oil control solenoid A connector (bank one)
• Rocker arm oil control solenoid A connector (bank two)
• Rocker arm oil control solenoid B connector (bank one)
• Alternator connector and positive alternator cable
• A/C clutch switch connector
• EGR 5P valve connector
• Engine ground
• Knock sensor
• Fuel injector connectors and clips
36. Remove the quick-connect fitting cover, then disconnect the fuel feed hose.
37. Remove the EVAP canister purge joint with the bracket.
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38. Remove the fuel rail connecting joint hose.
39. Remove the EGR pipe mounting bolts, then remove the EGR pipe.
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40. Separate the water passage from the heads.
41. Remove the appropriate WU-TWC depending on diagnosis.
NOTE: Set the WU-TWC aside and cover the opening with shop towels to prevent coolant from entering.
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42. Remove the appropriate head with the injector base attached.
NOTE: Depending on diagnosis, you will remove the rear bank head or both heads.
43. Measure the head bolts to determine if they need replacement. If either diameter is less than 11.3 mm (0.445 in),
replace the cylinder head bolt.
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NOTE: Below are the head bolt torque specifications for reinstallation.
•
First step: Torque the cylinder bolts in sequence to 29 N•m (22 lb-ft).
•
Second step: Tighten in sequence an additional 90 degrees.
•
Third step: Tighten in sequence an additional 90 degrees.
•
If the bolts are new, tighten an additional 90 degrees.
44. Raise the vehicle.
45. Remove the CKP sensor cover and bolts, then disconnect the CKP sensor connector.
46. Remove the torque converter case cover and the four bolts securing the oil pan to the transmission.
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47. Remove all bolts securing the oil pan.
48. Using a flat-blade screwdriver, separate the oil pan from the engine block in the areas shown.
49. Remove the oil strainer and baffle plate.
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50. Lower the vehicle to a comfortable working height, and place a clean shop towel around the cylinder wall to prevent
debris from entering the coolant passage.
51. Remove the appropriate piston depending on diagnosis, then go to PISTON CLEANING PROCEDURE.
NOTE:
• Before removing the rod caps, use a grease pencil or suitable marking pen to mark each cap and its
corresponding connecting rod with the cylinder number it came from.
• Do not confuse the existing marking on the side of the connecting rod and rod cap with a cylinder number.
They are just manufacturing marks referring to the size of the big end of the rod.
• Installing a rod cap incorrectly will result in engine knock and/or engine failure. Remove and mark one rod
assembly at a time to make sure it is assembled correctly.
• When torqueing the rod cap bolts, refer to the service information for details.
• Click HERE to go to the Tech2Tech® video “Tips When Working with Fracture Rods”.
Piston Cleaning and Ring Replacement Procedure
1. Remove the piston rings from the piston using a ring expander. Be careful not to damage the piston.
2. Spray the piston head and piston ring grooves thoroughly with Honda throttle plate cleaner.
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3. While holding the piston upright in your left hand, take the piston ring groove cleaner tool in your right hand and line up
the cleaner tool guides with the second (middle) piston ring groove.
4. Press the handle on the piston ring groove cleaner tool and slide the cleaning bit onto the appropriate piston ring
grooves.
5. Once the cleaning bit is in the appropriate ring grooves of the piston, make sure the tool handle clicks into place.
NOTE: There is only one notch on the tool for the handle to engage.
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6. Hold the piston steady and rotate the tool counterclockwise five to six times to remove any carbon deposits in the
piston ring grooves. Do not rotate the tool clockwise.
NOTE: You can watch this procedure in the Tech2Tech segment “How to Clean Piston Ring Grooves”.
7. Remove the piston groove cleaning tool and clean off the carbon from the tool bit.
8. Finish cleaning the piston with throttle plate cleaner and the nylon brush. Do not use a steel wire brush.
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NOTE: Below are some examples of before and after pictures. Depending on mileage and running conditions, the
pistons will achieve different levels of cleanliness.
Page 23 of 25
9. Install the piston rings as shown.
NOTE: The first (top) ring has a 1D manufacturing mark and the second (middle) ring has an SPR manufacturing
mark. The manufacturing marks must be facing upward.
10. Position the ring end gaps as shown.
NOTE: If the ring gaps are not positioned correctly, excessive blowby may occur.
11. Apply new engine oil to the piston, the inside of the piston ring compressor, and the cylinder bore.
NOTE: Cylinder wall honing is NOT required for this repair.
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12. Install the piston/connecting rod assembly into the cylinder bore with the arrow on top of the piston facing the timing
belt side of the engine.
NOTE: Be careful not to damage the cylinder wall when installing the piston.
13. Measure the diameter of the connecting rod bolts to determine if they need replacement. Calculate the difference in
diameter between point A and point B. It should not be more than 0–0.1 mm (0–0.004 in).
14. Apply new oil to the connecting rod bolt threads and flanges. Torque the bolts to 20 N•m (14 lb-ft) then, tighten the
connecting rod bolts an additional 90 degrees.
15. Reinstall the remaining components in the reverse order of removal.
16. Replace spark plugs 1–4.
17. Replace the oil filter and refill all fluids.
18. Do the idle learn procedure.
END.
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