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 A/T SYSTEM or HOW
TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
5. DO THE PCM IDLE LEARN PROCEDURE .
6. Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC Pending DTC Freeze Frame
P0123 TP SENSOR A CIRCUIT HIGH VOLTAGE
Is DTC P0123 indicated?
YES : Check for poor connections or loose terminals at the throttle body and the PCM. If the PCM was
updated, substitute a known-good PCM See PCM REMOVAL AND INSTALLATION or PCM
UPDATE , then recheck. If the PCM was substituted, go to step 1.
NO : 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.
DTC P0125: ECT SENSOR 1 MALFUNCTION/SLOW RESPONSE
Fig. 50: DTC Troubleshooting Flow Chart (P0125)
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 .
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P0125 ECT SENSOR 1 MALFUNCTION/SLOW
RESPONSE
1. ECT sensor 1 check:
1. Start the engine, and let it idle for 5 minutes or more.
2. Check the parameter(s) below with the HDS.
Threshold
Values
Current conditions
Unit Values Unit
Signal
Less than 0 °F
Less than - 18 °C
ECT SENSOR 1
Do the current condition(s) match the threshold?
YES : Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM. If
they are OK, REPLACE ECT SENSOR 1 , then do the repair verification .
NO : Go to step 2.
2. Problem verification:
1. Turn the ignition switch to LOCK (0).
2. Allow the engine to cool to 104 °F (40 °C) or less.
3. Start the engine, and let it idle until ECT SENSOR 1 goes up to about 158 °F (70 °C).
Current conditions
Signal
Values
Unit
ECT SENSOR 1
4. Check the parameter(s) below with the HDS.
Threshold Current conditions
Signal
Values Unit Values
About 158 °F
About 70 °C
Unit
ECT SENSOR 2
Do the current condition(s) match the threshold?
YES : The failure is duplicated. Go to step 3.
NO : Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at
ECT sensor 1, ECT sensor 2, and the PCM.
3. Thermostat check:
1. CHECK THE THERMOSTAT .
Is the thermostat OK?
YES : Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM. If the
connections and terminals are OK, REPLACE ECT SENSOR 1 , then do the repair verification .
NO : REPLACE THE THERMOSTAT , then do the repair verification .
REPAIR VERIFICATION
1. Turn the ignition switch to ON (II).
2. Reset the PCM with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or HOW
TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
3. Turn the ignition switch to LOCK (0).
4. Allow the engine to cool to 104 °F (40 °C) or less.
5. Start the engine, and let it idle until ECT SENSOR 1 goes up to about 158 °F (70 °C).
Current conditions
Signal
Values
Unit
ECT SENSOR 1
6. Check the parameter(s) below with the HDS.
Threshold Current conditions
Signal
Values Unit Values
About 158 °F
About 70 °C
Unit
ECT SENSOR 2
Do the current condition(s) match the threshold?
YES : Check for poor connections or loose terminals at ECT sensor 1, ECT sensor 2, and the PCM, go to step 1.
NO : Troubleshooting is complete. If the PCM was substituted, replace the original PCM See PCM UPDATE
or PCM REMOVAL AND INSTALLATION . If any other Pending or Confirmed DTCs are indicated, go to
the indicated DTC's troubleshooting.
DTC P0128: COOLING SYSTEM 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
