HIGH VOLTAGE
Is DTC P1157 indicated?
YES : The A/F sensor (Sensor 1) is OK. Update the PCM See PCM REMOVAL AND
INSTALLATION or PCM UPDATE if it does not have the latest software, or substitute a known-
good PCM See PCM REMOVAL AND INSTALLATION or PCM UPDATE , then do the repair
verification .
NO : REPLACE THE ORIGINAL A/F SENSOR (SENSOR 1) , then do the repair verification .
REPAIR VERIFICATION
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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 .
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5. DO THE PCM IDLE LEARN PROCEDURE .
6. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P1157 A/F SENSOR (SENSOR 1) AFS CIRCUIT HIGH
VOLTAGE
Is DTC P1157 indicated?
YES : Check for poor connections or loose terminals at the A/F sensor (Sensor 1) 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 P1172: A/F SENSOR (SENSOR 1) CIRCUIT OUT OF RANGE HIGH
Fig. 288: DTC Troubleshooting Flow Chart (P1172)
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
P1172 A/F SENSOR (SENSOR 1) CIRCUIT OUT OF
RANGE HIGH
1. Problem verification:
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1. Turn the ignition switch to ON (II).
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2. Clear the DTC with the HDS See HOW TO TROUBLESHOOT THE A/T SYSTEM or
HOW TO TROUBLESHOOT THE FUEL AND EMISSIONS SYSTEMS .
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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. Monitor the OBD STATUS for DTC P1172 with the HDS.
DTC Description
OBD Status
P1172 A/F SENSOR (SENSOR 1) CIRCUIT OUT OF RANGE HIGH
Does the HDS indicate FAILED?
YES : REPLACE THE A/F SENSOR (SENSOR 1) , 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 the A/F Sensor (Sensor 1) 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 1-3 and recheck.
REPAIR VERIFICATION (OBD STATUS CHECK)
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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 .
ο‘
ο‘
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.
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7. Monitor the OBD STATUS for DTC P1172 in the DTCs MENU with the HDS.
DTC Description
OBD Status
P1172 A/F SENSOR (SENSOR 1) CIRCUIT OUT OF RANGE HIGH
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 idling until a result comes on.
OUT OF CONDITION : Meet the test condition, and check the OBD STATUS again.
DTC P1297: ELD CIRCUIT LOW VOLTAGE
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
