A23-100

Service Bulletin
March 5, 2024
23-100
Version 2
MIL is On with DTC P2DE1
Supersedes 23-100, dated December 8, 2023, to revise the information.
AFFECTED VEHICLES
Year
Model
Trim Level
VIN Range
2021ꟷ22
HR-V
ALL
ALL
REVISION SUMMARY
The REPAIR PROCEDURE was updated.
SYMPTOM
The MIL is on with DTC P2DE1 (Cold Start Air-Fuel Ratio Control System Rich).
POSSIBLE CAUSE
During engine start in cold conditions, a miscalculation in the PCM causes the air-fuel ratio to exceed DTC P2DE1 rich
criteria.
CORRECTIVE ACTION
Update the PGM-FI software.
PARTS INFORMATION
Part Name
Part Number
Quantity
Drain Plug Washer (14mm)
94109-14000
1
Part Name
Part Number
Quantity
Motor Oil (0W-20)
08798-9029
4
REQUIRED MATERIALS
CUSTOMER INFORMATION: The information in this bulletin is intended for use only by skilled technicians who have the proper tools, equipment,
and training to correctly and safely maintain your vehicle. These procedures should not be attempted by “do-it-yourselfers,” and you should not
assume this bulletin applies to your vehicle, or that your vehicle has the condition described. To determine whether this information applies, contact
an authorized Honda automobile dealer.
© 2024 American Honda Motor Co., Inc. – All Rights Reserved
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WARRANTY CLAIM INFORMATION
The normal warranty applies.
Operation
Number
Description
Flat Rate
Time
Defect
Code
Symptom
Code
Template
ID
Failed Part Number
1255D8
Update the PGM-FI
software
0.2 hr
03214
03217
A23100A
37805-51M-AA1
K
Replace the engine oil - 0.3 hr
add
03214
03217
A23100B
37805-51M-AA1
Skill Level: Repair Technician
SOFTWARE INFORMATION
NOTE: Unnecessary or incorrect repairs resulting from a failure to update the diagnostic and reprogramming software are
not covered under warranty.
Before beginning the repair, make sure all diagnostic and reprogramming software are updated as listed.
i-HDS Software Version
1.009.003 or later
HDS Software Version
3.105.036 or later
Honda ECU Reprogramming
4.1.0.0 or later
For more information about updating vehicle systems, refer to service bulletin 22-100, Updating Control Units/Modules
with the ECU Reprogramming Application.
Update only the systems and software listed in this service bulletin.
Do not use the MongoosePRO VCI for this service bulletin as it is not an American Honda-approved device.
Year/Model
HR-V 2WD LX
HR-V 2WD Sport
HR-V AWD LX
HR-V AWD Sport
HR-V 2WD EX, EX-L
HR-V AWD EX, EX-L, Touring
Vehicle
System
PGM-FI
PGM-FI
PGM-FI
PGM-FI
PGM-FI
PGM-FI
Program ID (or later)
37805-51M-AA20
37805-51M-AB20
37805-51M-AD20
37805-51M-AE20
37805-51M-AC30
37805-51M-AF30
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REPAIR PROCEDURE
1. Do an ALL DTC check and verify if DTC P2DE1 is stored.
2. Check the engine oil.
3. Park the vehicle on level ground and start the engine. Hold the engine speed at 3000 RPM with no load until the
radiator fan comes on, then turn off the engine and wait more than 3 minutes.
4. Remove the dipstick, and wipe off the dipstick, then reinstall the dipstick.
5. Remove the dipstick and check the engine oil level. It should be between the upper mark (A) and the
lower mark (B).
Is the engine oil level above the upper mark?
YES – Continue to step 6.
NO – No engine oil change is needed. Go to SOFTWARE UPDATE PROCEDURE and update the PGM-FI software.
6. Engine Oil Replacement (Check Engine Section under ESM > Lubrication System > Repair Procedures, Tests).
1. Lift the vehicle by positioning the lift pads under the vehicle’s front support points and rear support points.
2. Remove the engine undercover.
3. Remove the front splash shield.
4. Remove the drain bolt and drain the engine oil.
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5. Reinstall the drain bolt with a new washer and torque to specification: 40 N.m (30 lb-ft).
6. Install Engine undercover/ Front splash shield.
7. Refill the engine with the recommended engine oil.
NOTE: Engine oil capacity without oil filter: 3.5 L (3.7 US qt)
7. Check the engine oil level again.
NOTE: Run the engine for more than 3 minutes, then check the oil level and check for oil leakage.
8. Reset the maintenance minder.
NOTE:
• If the Maintenance Minder is required to replace the engine oil, reset the Maintenance Minder with the gauge
(see "Resetting the Maintenance Minder").
•
If the Maintenance Minder did not require to replace the engine oil, reset the Maintenance Minder with the
HDS (see "Resetting Individual Maintenance Items").
9. Go to SOFTWARE UPDATE PROCEDURE
SOFTWARE UPDATE PROCEDURE
NOTICE
•
Make sure the 12-volt battery is fully charged before starting an update.
•
Connect a fully charged jumper battery pack, the Midtronics GR8-1100P AST in Power Supply Mode or the Midtronics
DCA-8000 Dynamic Diagnostic Charging System in Reflash Mode, directly to the vehicle’s 12-volt battery. Leave it
connected during the entire procedure to maintain a steady voltage.
•
If the vehicle’s 12-volt battery drops below 10 volts during the update, the programming status bar may not present
accurately, or the Honda ECU Reprogramming application may display an error message.
•
Control module failure caused by the improper completion of a software update (early key cycle, low battery voltage,
disconnected DLC cable, etc.) is not covered by warranty.
•
If an error occurs during the update or the i-HDS freezes, do not disconnect the battery or turn the ignition to OFF.
Reboot the i-HDS and start over.
•
To prevent control unit damage, do not operate anything electrical (headlights, audio system, brakes, A/C, power
windows, door locks, etc.) during the update.
•
Warranty reimbursement for technician labor is not allowed for routine checking/installation of any available software
update.
1. Update the PGM-FI software, see service bulletin 22-100 Updating Control Units/Modules with the Honda ECU
Reprogramming Application.
2. Do an ALL DTC CHECK and clear any codes that may have set during the update.
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