DTC Description
OBD STATUS
P0138 SECONDARY HO2S (SENSOR 2) CIRCUIT HIGH VOLTAGE
Does the HDS indicate PASSED, FAILED, EXECUTING, or OUT OF CONDITION?
PASSED : Troubleshooting is complete. If the PCM was substituted, replace the original PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE . If any other Pending or Confirmed DTCs are
indicated, go to the indicated DTC's troubleshooting.
FAILED : Go to step 1 and recheck. If the PCM was updated, substitute a known-good PCM See PCM
REMOVAL AND INSTALLATION or PCM UPDATE , then check the OBD STATUS again.
EXECUTING : Keep the test condition until a result comes on.
OUT OF CONDITION : Meet the test condition, and check the OBD STATUS again.
DTC P0139: SECONDARY HO2S (SENSOR 2) SLOW RESPONSE
Fig. 71: DTC Troubleshooting Flow Chart (P0139)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
NOTE:
Before you troubleshoot, record all freeze data and any on-board
snapshot, and review the general troubleshooting information See HOW
TO TROUBLESHOOT THE A/T SYSTEM or HOW TO TROUBLESHOOT THE
FUEL AND EMISSIONS SYSTEMS .
If the exhaust leaks from the exhaust system, this DTC will be set. Check
for damage in the exhaust pipe, and repair it if needed.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P0139 SECONDARY HO2S (SENSOR 2) SLOW
RESPONSE
1. Problem verification:
1. Turn the ignition switch to ON (II).
2. Clear the DTC with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or
HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
3. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator
fan comes on, then let it idle.
4. Test-drive under these conditions:
Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C)
Transmission in D
Drive at a steady speed between 55-75 mph (90-120 km/h) for 1 minute, then decelerate
(with the throttle fully closed) for 10 seconds
Current conditions
Signal
Values
Unit
ECT SENSOR 1
VEHICLE SPEED
5. Monitor the OBD STATUS for DTC P0139 with the HDS.
DTC Description
OBD STATUS
P0139 SECONDARY HO2S (SENSOR 2) SLOW RESPONSE
Does the HDS indicate FAILED?
YES : The failure is duplicated. REPLACE SECONDARY HO2S (SENSOR 2) , then do the repair
verification .
NO : If the HDS indicates PASSED, intermittent failure, the system is OK at this time. Check for poor
connections or loose terminals at secondary HO2S (Sensor 2) and the PCM. If the HDS indicates
EXECUTING, keep driving until a result comes on. If the HDS indicates OUT OF CONDITION, go to
step 3 on this step and recheck.
REPAIR VERIFICATION (OBD STATUS CHECK)
1. Turn the ignition switch to LOCK (0).
2. Reconnect all connectors.
3. Turn the ignition switch to ON (II).
4. Reset the PCM with the HDS See HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS
SYSTEMS or HOW TO TROUBLESHOOT THE A/T SYSTEM .
5. DO THE PCM IDLE LEARN PROCEDURE .
6. Start the engine. Hold the engine speed at 3, 000 rpm without load (in P or N) until the radiator fan
comes on, then let it idle.
7. Test-drive under these conditions:
Engine coolant temperature (ECT SENSOR 1) above 158 °F (70 °C)
Transmission in D
Drive at a steady speed between 55-75 mph (90-120 km/h) for 1 minute, then decelerate (with the
throttle fully closed) for 10 seconds
Current conditions
Signal
Values
Unit
ECT SENSOR 1
VEHICLE SPEED
8. Monitor the OBD STATUS for DTC P0139 with the HDS.
DTC Description
OBD STATUS
P0139 SECONDARY HO2S (SENSOR 2) SLOW RESPONSE
Does the HDS indicate PASSED, FAILED, EXECUTING, or OUT OF CONDITION?
PASSED : Troubleshooting is complete. If any other Pending or Confirmed DTCs were indicated, go to the
indicated DTC's troubleshooting.
FAILED : Go to step 1 and recheck.
EXECUTING : Keep the test condition until a result comes on.
OUT OF CONDITION : Meet the test condition, and check the OBD STATUS again.
DTC P0141: SECONDARY HO2S (SENSOR 2) HEATER CIRCUIT
MALFUNCTION
2024 Honda CR-V Owner's Manual
2023 Honda CR-V Owner's Manual
2021 Honda CR-V Owner's Manual
2018 Honda CR-V Owner's Manual
2015 Honda CR-V Owner's Manual
