DTC P0721: OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR
(RANGE/PERFORMANCE)
Fig. 23: DTC Troubleshooting Flow Chart (P0721)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
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Before you troubleshoot, record all freeze data and any on-board snapshot
with the HDS, and review the General Troubleshooting Information See
HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW TO
TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
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This code is caused by an electrical circuit problem and cannot be caused
by a mechanical problem in the transmission.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P0721 Output Shaft (Countershaft) Speed Sensor
(Range/Performance)
1. DTC check:
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1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Raise the vehicle on a lift. Make sure it is securely supported, and allow the front wheels to
rotate freely.
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4. Start the engine, disable the VSA by pressing the VSA OFF button, run the vehicle with the shift
lever in D, and keep the vehicle speed at speeds over 12 mph (20 km/h) for at least 10 seconds.
Slow down, and stop the wheels.
5. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P0723 Output Shaft (Countershaft) Speed Sensor
(Intermittent Failure)
Is DTC P0723 indicated?
YES : DO THE TROUBLESHOOTING FOR DTC P0723.
NO : Go to step 2.
2. Problem verification:
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1. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P0721 Output Shaft (Countershaft) Speed Sensor
(Range/Performance)
Is DTC P0721 indicated?
YES : The failure is duplicated. Go to step 3.
NO : Intermittent failure, the system is OK at this time.
3. Output shaft (countershaft) speed sensor connection check:
Are the connection and installation OK?
YES : The connection and installation are OK. REPLACE THE OUTPUT SHAFT
(COUNTERSHAFT) SPEED SENSOR , then do the repair verification .
NO : Repair faulty connection or installation, then do the repair verification .
REPAIR VERIFICATION
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1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS.
3. Start the engine, disable the VSA by pressing the VSA OFF button, run the vehicle with the shift lever
in D, and keep the vehicle speed at speeds over 12 mph (20 km/h) for at least 10 seconds. Slow down, and
stop the wheels.
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4. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P0721 Output Shaft (Countershaft) Speed Sensor
(Range/Performance)
Is DTC P0721 indicated?
YES : Troubleshooting is incomplete. Go to step 1.
NO : Troubleshooting is complete.
DTC P0722: OUTPUT SHAFT (COUNTERSHAFT) SPEED SENSOR (NO
SIGNAL INPUT)
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