Service Bulletin
April 5, 2019

19-037
Version 1

Warranty Extension: 2017-18 CR-V: DTC P0300, P0301, P0302, P0303,
P0304, or P0172; Whirling Noise from Engine
WARRANTY CLAIM INFORMATION
Year

Model

Trim

VIN Range

2017-18

CR-V

EX, EX-L, Touring

Check the iN VIN status for eligibility.

BACKGROUND
Under certain circumstances, the vehicle may experience driveability issues, which may result in DTCs P0300 (random
misfire detected), P0301 (No. 1 cylinder misfire detected), P0302 (No. 2 cylinder misfire detected), P0303 (No. 3
cylinder misfire detected), P0304 (No. 4 cylinder misfire detected), or P0172 (fuel system too rich) or a whirling noise
coming from the engine compartment.
NOTE
Check the VIN of the vehicle to see if S/B 18-114, 18-124, or 19-025 apply. If one applies and the repair directed by that
bulletin has not been completed, do the applicable repair before continuing.
To increase customer confidence, American Honda is extending the powertrain warranty on the camshafts, rocker arm
assemblies, and spark plugs from the original 5 years or 60,000 miles to 6 years with unlimited mileage from the original
sale date.
This warranty extension will 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. This does not affect emission
warranties.
POSSIBLE CAUSE
Based on certain driving patterns and environmental factors, the DTC's stated above may set or whirling noise may
occur.
CORRECTIVE ACTION
If S/B 18-114, 18-124, or 19-025 applies to this vehicle, complete the repairs under that bulletin first. If S/B 18-114,
18-124, or 19-025 applies, the applicable repair was completed, and misfire (P0300, P0301, P0302, P0303, P0304) or
fuel system too rich (P0172) DTCs were set after the earlier repair was completed, do REPAIR PROCEDURE A. If there
is a whirling noise coming from the engine compartment, do REPAIR PROCEDURE B

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.
©

2019 American Honda Motor Co., Inc. — All Rights Reserved

Page 1 of 12

WARRANTY CLAIM INFORMATION
NOTE
•

DTC is required with claim submission.

NOTE
Use the following templates if the spark plugs were also replaced.
Operation
Number

Description

Flat Rate
Time

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

1175A3

Replace spark plugs.
(Inspection or
replacement) (Admin
Included)

0.5 hr

6D700

X4A00

A19037A

12290-5PA-A01

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

6D700

X4A00

A19037B

37805-5PA-A85

NOTE
Use the following template if the camshafts were only inspected.
Operation
Number

Description

Flat Rate
Time

1105C1

Remove valve cover and 0.7 hr
inspect camshafts. (No
replacement required.)

NOTE
Use the following template if the camshafts and rocker arm assembly were also replaced.
Operation
Number

Description

Flat Rate
Time

1105C1

Remove valve cover and 0.7 hr
inspect camshafts.

A

Replace camshafts and
rocker arm assembly.
(Pre-approval needed,
see iN parts catalog for
ordering.)

Defect
Code

Symptom
Code

Template
ID

Failed Part Number

6D700

X4A00

A19037C

37805-5PA-A85

5.1 hr

Skill Level: Repair Technician

Page 2 of 12

PARTS INFORMATION
These parts are needed if replacing the spark plugs.
Part Name

Part Number

Quantity

Spark Plugs

12290-5PA-A01

4

REPAIR PROCEDURE A
1. In some cases, the misfire DTCs may return. If this happens, inspect the spark plugs.

•

If the spark plugs are OK, the procedure is complete. Continue with normal troubleshooting.

•

If the spark plugs are fouled, go to step 2.

2. Replace the spark plugs per service information and check for stored DTCs.
NOTE
Make sure to write down the stored DTCs on the R.O.
•

If the applicable DTCs do not return, the procedure is complete.

•

If the applicable DTCs return, this bulletin does not apply. Continue with normal troubleshooting.

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REPAIR PROCEDURE B
If there is a whirling noise coming from the engine, follow the procedure below.
1. Warm up the engine by increasing the engine speed to 3,000 rpm for two fan cycles.
2. After the warm-up procedure is completed, let the car return to idle for 10 seconds.
3. After 10 seconds, slowly increase the engine speed up to 3500 rpm (this should take at least 20 seconds).
4. Once the engine speed reaches 3500 rpm, release the accelerator pedal and let the engine speed return to idle.
5. With the hood closed and inside the cabin, compare the audio file here to the noise heard.
•

If the noise is similar, continue to step 6.

•

If the noise is not similar, this bulletin does not apply. Continue with normal system troubleshooting.

6. Remove the cylinder head cover. See service information for additional instructions.
7. Compare the appearance of the camshaft lobes to the photo below.

•

If the camshafts appear similar to the no good photo, go to step 8.

•

If the camshafts appear similar to the good photo, this bulletin does not apply. Continue with normal system
troubleshooting.

8. Take a photo of the cam lobe, then follow the directions in the parts catalog when ordering the necessary parts.
NOTE
Please send photos of failed camshafts to PART_RELEASE@AHM.HONDA.COM to receive approval and release
parts.

Page 4 of 12

The following instructions are for replacement of the intake and exhaust camshafts and all rocker arm assemblies. This
is only if you have been approved by following the instructions in the parts catalog.
1. Relieve the fuel pressure and remove the high pressure fuel pump. Refer to the service information for additional
instructions.
2. Set the crankshaft to top dead center (TDC) for No. 1 cylinder. Refer to step 4 of the Camshaft Timing Inspection in
the service information.
3. Mark the timing chain at the punch marks on the exhaust and intake camshaft sprocket and VTC actuator as seen
below.

4. Raise the vehicle on a lift.
5. Remove the right front wheel and the engine undercover.
6. Remove the cam chain auto-tensioner (chain case) cover.
7. Slightly rotate the crankshaft counterclockwise to compress the auto-tensioner. Line up the hole in the lock and
auto-tensioner, then insert a 1.2 mm diameter lock pin.

8. Rotate the crankshaft clockwise back to TDC on the No. 1 cylinder to secure the lock pin in place.

Page 5 of 12

9. Remove the camshaft chain auto-tensioner with the lock pin inserted.

10. Lower the vehicle.
11. Loosen the locknuts and adjusting screws.

Page 6 of 12

12. Remove the high pressure fuel pump base.

13. Remove the camshaft holder bolts, then remove the camshaft holders. To prevent damaging the camshafts, loosen
the bolts in sequence, two turns at a time.

Page 7 of 12

14. Lift up the cam chain, then carefully remove the intake camshaft followed by the exhaust camshaft. You must
maintain tension on the cam chain while you do this.

15. Use a bungee cord to hold tension on the cam chain while you are replacing the camshafts.

16. When removing the camshaft holders, cam chain guide, and intake and exhaust camshaft, make sure to place them
in order of installation on a clean, padded workbench.

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17. Remove the rocker arm assembly, and install the new set. Refer to the service information for additional instructions.

Page 9 of 12

18. With the camshafts out of the engine, hold them with an open-end wrench and loosen the VTC actuator mounting
bolts on both camshafts.
19. Install the VTC actuators on the new camshafts.
NOTE
You may need an assistant to help you with this procedure.

20. Apply fresh engine oil to the new camshafts, and install.

Page 10 of 12

21. When installing the new camshafts, ensure the previously made marks on the VTC actuator and cam chain line up.

22. Install the camshaft holders and the cam chain guide, then torque them to specification.
23. Install the camshaft chain tensioner and release the lock pin.
24. Install the new cam chain auto-tensioner (chain case) cover.

25. To check the camshaft timing, rotate the crankshaft in the direction of engine rotation (clockwise) two full turns, then
stop at the TDC mark. Refer to step 4 of the Camshaft Timing Inspection in the service information.
26. Do a valve adjustment.

Page 11 of 12

27. Install the high pressure fuel pump base and new camshaft holder cover. Refer to step 7 of the installation section of
the Cylinder Head Removal and Installation (1.5L Engine) in the service information.

28. Install the cylinder head cover. Refer to the service information for additional instructions.
29. Install the high pressure fuel pump with the new o-ring and fuel joint pipe. Refer to the service information for
additional information.
30. Install the engine undercover and any other remaining parts.
31. During the first start up, check for DTCs set or abnormal noises. Refer to service information for additional
instructions.
32. Reset the throttle position learned values by referencing the throttle body removal and installation in the service
information, then do the PCM idle learn procedure. Refer to service information for additional instructions.
NOTE
For more information on the PCM idle learn procedure, see the Tech2Tech® video, "A Look at PCM Idle Learn".
END

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