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1. Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC Pending DTC Freeze Frame
P2229 BARO SENSOR CIRCUIT HIGH VOLTAGE
Is DTC P2229 indicated?
YES : Check for poor connections or loose terminals at 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 P2238: A/F SENSOR (SENSOR 1) AFS+ CIRCUIT LOW VOLTAGE
Fig. 396: DTC Troubleshooting Flow Chart (P2238)
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
P2238 AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) AFS+
CIRCUIT LOW VOLTAGE
1. Problem verification:
ο‘
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 .
ο‘
3. Check for Pending or Confirmed DTCs with the HDS.
Confirmed
DTC
Pending
DTC
Freeze
Frame
DTC Description
P2238 AIR FUEL RATIO (A/F) SENSOR (SENSOR 1)
AFS+ CIRCUIT LOW VOLTAGE
Is DTC P2238 indicated?
YES : The failure is duplicated. Go to step 2.
NO : Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at
the A/F sensor (Sensor 1), the PGM-FI subrelay, and the PCM.
2. Shorted wire check (AFS+ line):
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1. Turn the ignition switch to LOCK (0).
2. Jump the SCS line with the HDS.
3. Disconnect the following connectors
A/F sensor (Sensor 1) 4P connector
PCM connector C (49P)
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4. Check for continuity between test points 1 and 2.
Test condition IG LOCK (0)
A/F sensor (Sensor 1) 4P connector: disconnected
PCM connector C (49P): disconnected
Test circuit AFS+
Test point 1 PCM connector C (49P) No. 39 (RED)
Test point 2 Body ground
Fig. 397: Checking Continuity Between PCM Connector C (49P) No. 39 (RED) And Body
Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES : Repair a short in the AFS+ wire between the PCM (C39) and the A/F sensor (Sensor 1), then do
the repair verification .
NO : The AFS+ wire is OK. Go to step 3.
3. PCM internal circuit check:
ο‘
ο‘
ο‘
1. Reconnect PCM connector C (49P).
2. Turn the ignition switch to ON (II).
3. Measure the voltage between test points 1 and 2.
Test condition IG ON (II)
A/F sensor (Sensor 1) 4P connector: disconnected
Test circuit AFS+
Test point 1 A/F sensor (Sensor 1) 4P connector No. 2 (RED)
Test point 2 Body ground
Fig. 398: Measuring Voltage Between A/F Sensor (Sensor 1) 4P Connector No. 2 (RED) And
Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is the voltage about 2.2 V?
YES : The PCM internal circuit is OK. REPLACE THE A/F SENSOR (SENSOR 1) , then do the
repair verification .
NO : 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 UPDATE or PCM
REMOVAL AND INSTALLATION , 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 .
ο‘
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5. DO THE PCM IDLE LEARN PROCEDURE .
6. Monitor the OBD STATUS for DTC P2238 in the DTCs MENU with the HDS.
OBD
DTC Description
Status
P2238 AIR FUEL RATIO (A/F) SENSOR (SENSOR 1) AFS+ CIRCUIT LOW
VOLTAGE
Does the HDS indicate PASSED, FAILED, or NOT COMPLETED?
PASSED : 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 were
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.
NOT COMPLETED : Keep idling until a result comes on.
DTC P2252: A/F SENSOR (SENSOR 1) AFS- CIRCUIT LOW VOLTAGE
Fig. 399: DTC Troubleshooting Flow Chart (P2252)
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
P2252 A/F SENSOR (SENSOR 1) AFS-CIRCUIT LOW
VOLTAGE
2024 Honda CR-V Owner's Manual
2023 Honda CR-V Owner's Manual
2021 Honda CR-V Owner's Manual
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2015 Honda CR-V Owner's Manual
