Illuminated MIL With DTC P2D40 – Updated Workshop Manual (WSM) Diagnostics – 2020-2023 Ford Explorer/Police Interceptor Utility & Lincoln Aviator – Hybrid

NHTSA ID Number: 10220380

Manufacturer Communication Number: TSB 22-2342

Summary

Some 2020-2022 Explorer/Aviator/Police Interceptor Utility vehicles equipped with a hybrid powertrain may exhibit an illuminated MIL with diagnostic trouble code (DTC) P2D40. This may be due to the chiller not interpreting the correct cooling value of the high voltage battery chiller. To correct the condition, follow the Service Procedure to diagnose the cause of the incorrect value.

 


Model:

FordeBay logo

2022 Explorer

PHEV or FHEV powertrain
2020-2022 Police Interceptor Utility
PHEV or FHEV powertrain
LincolneBay logo

2020-2022 Aviator

PHEV or FHEV powertrain

 

Issue: Some 2020-2022 Explorer/Aviator/Police Interceptor Utility vehicles equipped with a hybrid powertrain may exhibit an illuminated MIL with diagnostic trouble code (DTC) P2D40. This may be due to the chiller not interpreting the correct cooling value of the high voltage battery chiller. To correct the condition, follow the Service Procedure to diagnose the cause of the incorrect value.

Action: Follow the Service Procedure to correct the condition on vehicles that meet the following criteria:

  • 2020-2022 Explorer/Aviator/Police Interceptor Utility
  • Plug-in hybrid (PHEV) or full-hybrid (FHEV) powertrain
  • Illuminated MIL with DTC P2D40

 

Parts

Parts To Inspect And Replace Only If Necessary

Service Part NumberQuantityDescription
L1MZ-10C708-AB1Cooling Unit Assembly (High Voltage Battery Cooler)
L1MZ-18N345-FBB1Valve Assembly (Coolant Diverter Valve)
VC-13DL-G
Ford Genuine Anti Freeze, VC-13DL-G
  • Compatible With Vehicle Type: marine-personal-craft

Last update on 2026-07-01 / Affiliate links / Images from Amazon Product Advertising API


 

As NeededMotorcraft® Yellow Prediluted Antifreeze/Coolant (All Markets Except Canada)
CVC-13DL-GeBay logoAs NeededMotorcraft® Yellow Prediluted Antifreeze/Coolant (Canada Only)
YN-33-AeBay logoAs NeededR-1234yf Refrigerant (All Markets Except Canada)
HS7Z-19B519-BAAs NeededR-1234yf Refrigerant (Canada Only)

 

Service Procedure

1. Place the vehicle in a location with a minimum ambient temperature of 65°F (18°C) for 3 hours.

2. Turn the ignition to the ON position.

3. Using the FordeBay logo Diagnostic and Repair System (FDRS), access the secondary on-board diagnostic module C (SOBDMC) and use output state control to control the HYTRACB_THRM_OP parameter identification (PID). Active command the parameter to Battery Cooling – Request Coolant Flow Through Radiator (with Fan Request).

4. Wait for 5 minutes. The fan and pump will turn on and run through this time.

5. Using the FDRS, access the battery energy control module (BECM), and monitor the BAT_COOL_INLETTEMP (Deg C) PID and verify the PID value is greater than or equal to 65°F or (18°C).

6. Is the temperature greater than or equal to 65°F (18°C)?

(1). Yes – proceed to Step 7.

(2). No – repeat steps 2-4 until a temperature greater or equal to 65°F (18°C) is achieved.

7. Once the temperature is greater than or equal to 65°F (18°C), access the SOBDMC and control the HYTRACB_THRM_OP PID and active command the PID to Battery Temperature Equalization – Coolant Flow Circulation Within Battery (No Intent To Transfer Heat In/Out).

8. Wait 5 minutes.

9. Record the coolant inlet temperature PID value.

10. Access the SOBDMC and control the HYTRACB_THRM_OP PID and active command the PID to Battery Cooling – Request Coolant Flow Through Chiller (Maximum Coolant Flow).

11. Wait for 2 minutes.

12. Access the BECM and monitor the BAT_COOL_INLETTEMP (Deg C) PID.

13. Record the PID Value.

14. Did the PID value in Step 13 indicate a drop of 3°C (6°F) from the PID value taken in Step 9?

(1). Yes – proceed to Step 18.

(2). No – proceed to Step 15.

15. Inspect the high voltage battery coolant cooler fins are cold to the touch. Are the battery coolant cooler fins cold to the touch?

(1). Yes – proceed to Step 16.

(2). No – replace the high voltage battery coolant cooler. Proceed to Step 18.

16. Check for high voltage battery coolant pump DTCs. If any high voltage battery coolant pump DTCs are present, refer to pinpoint test AJ in Workshop Manual (WSM), Section 303-03E, then proceed to Step 18. If no high voltage battery coolant pump DTCs are present, proceed to Step 17.

17. Check for high voltage battery coolant diverter valve DTCs. If any high voltage battery coolant diverter valve DTCs are present, refer to PPT H in WSM, Section 303-03E. If no high voltage battery coolant pump DTCs are present, install a new high voltage battery coolant diverter valve. Proceed to Step 18.

18. Clear DTCs and turn the vehicle off for 5 minutes.

19. Turn the ignition on and select normal Drive Mode from the selectable drive modes.

20. Using FDRS, access the SOBDMC and control the HYBATP_CCV_A PID and active command the PID to TRUE.

21. Using FDRS, access the BECM and monitor the Battery Temperature H_BATT_TEMP.

22. Drive the vehicle, avoiding wide open throttle on police vehicles to prevent entering pursuit mode.

23. Continue to drive the vehicle until SOBDMC_HYTRACB_THRM_OP state is Battery Cooling – Request Coolant Flow Through Chiller (Modulated Coolant Flow). This should occur once the BECM battery temperature access (H_BATT_TEMP) is greater than 125.6°F (51°C) for FHEV and 107.6°F(42°C) for PHEV.

24. Continue to drive the vehicle for an additional 5 minutes.

25. Check the SOBDMC and BECM for DTCs.

26. Did the SOBDMC or BECM set any DTCs?

(1). Yes – proceed to Step 27.

(2). No – the system is operating properly at this time. Repair is complete.

27. If the SOBDMC or BECM set a DTC other than P2D40, proceed with normal diagnostics found in WSM, Section 303-03. If the SOBDMC set P2D40, the thermal system is not cooling as it should. This could be the result of pinched hoses, air in the coolant, low refrigerant, or a partially blocked cooler.

28. Perform the cooling system fill routine. If any concerns are found, correct the condition as necessary, and perform Steps 18-26 again. If no concerns are found, proceed to Step 29.

29. Reinspect the coolant lines verifying no pinched, bent, or kinked hoses are present. If any concerns are found, correct the condition as necessary, and perform Steps 18-26 again. If no concerns are found, proceed to Step 30.

30. Perform an air conditioning (A/C) system evacuation on the refrigerant system. Record the captured weight. Is the refrigerant weight below 80% of the specification?

(1). Yes – diagnose and repair any leaks in the A/C system as necessary outside of this article.

(2). No – replace the coolant cooler and refill the system. Repeat Steps 18-26.

 


12 Affected Products

Vehicles

MAKEMODELYEAR
FORDeBay logoEXPLORER2020-2022
FORDeBay logoEXPLORER HYBRID2020-2022
FORDeBay logoEXPLORER POLICE INTERCEPT2020-2022
LINCOLNeBay logoAVIATOR2020-2022

 


1 Associated Document

Manufacturer Communications

22-2342
09 September 2022

https://www.nhtsa.gov/recalls?nhtsaId=10220380

MC-10220380-0001.pdf 80.113KB

 


NHTSA ID Number: 10230800

Manufacturer Communication Number: SSM 51297

Summary

Some 2020-2023 Explorer/Aviator/Police Interceptor Utility vehicles equipped with a hybrid powertrain may exhibit an illuminated malfunction indicator lamp (MIL) with diagnostic trouble code (DTC) P2D40. This may be due to the high voltage battery thermal system not cooling as it should. Follow the updated WSM Section 414-03 including listed possible sources, visual inspection and prechecks, and diagnostic procedures.

 


11 Affected Products

Vehicles

MAKEMODELYEAR
FORDeBay logoEXPLORER2020-2023
FORDeBay logoEXPLORER POLICE INTERCEPT2020-2022
LINCOLNeBay logoAVIATOR2020-2023

 


1 Associated Document

Manufacturer Communications

SSM 51297
2020-2023 Explorer/Aviator/Police Interceptor Utility – Hybrid – Illuminated MIL With DTC P2D40 – Updated Workshop Manual (WSM) Diagnostics

https://www.nhtsa.gov/recalls?nhtsaId=10230800

MC-10230800-0001.pdf 99.589KB

 


 

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