Toyota P1CE931
No Signal From the Charging Fan © 2021 Toyota Motor Sales, USA Repair Procedure (continued) 3. Flash reprogram the charger assembly plug-in. Follow the procedures outlined in T-SB-
Quick answer
P1CE931 is documented by Toyota as “No Signal From the Charging Fan” for the 2021 Toyota RAV4 Prime in the US. Toyota bulletin T-SB-0021-21 Rev1 specifies reprogramming the plug-in charger assembly with an updated calibration.
This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.
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1. What does P1CE931 mean?
P1CE931 is documented by Toyota as “No Signal From the Charging Fan” for the 2021 Toyota RAV4 Prime in the US. Toyota bulletin T-SB-0021-21 Rev1 specifies reprogramming the plug-in charger assembly with an updated calibration.
2. Technical explanation
Verified evidence identifies P1CE931 as a charging-fan signal fault. The supplied Toyota/NHTSA bulletin excerpt includes a repair-procedure step directing technicians to flash reprogram the charger assembly plug-in using the new calibration file and Toyota’s Techstream ECU flash-reprogramming procedure (T-SB-0107-20). The supplied evidence does not establish the underlying component-level cause, diagnostic sequence, or whether parts replacement is required.
3. What system is affected?
Plug-in charger assembly / charging-fan signal circuit or function. The precise system architecture is not yet established by verified evidence.
4. How serious is this code?
Unknown. No verified evidence supplied assigns a severity level.
5. Symptoms you may notice
- A stored P1CE931 diagnostic trouble code may be present.
- Additional driver-visible symptoms are not yet established by verified evidence.
6. Possible causes
- Toyota identifies the condition as “No Signal From the Charging Fan.”
- The specific root cause is not yet established by verified evidence.
7. Can I still drive the vehicle?
Not yet established by verified evidence.
8. Can I charge the vehicle?
Not yet established by verified evidence.
9. What you can safely do
- Arrange diagnosis by a Toyota dealer or qualified service facility.
- Do not attempt high-voltage, charger-assembly, or ECU programming repairs without appropriate manufacturer procedures and training.
- Record the code and any charging-related observations for the service appointment.
10. Step-by-step troubleshooting
- Confirm the stored DTC using approved diagnostic equipment.
- Have a qualified technician consult Toyota bulletin T-SB-0021-21 Rev1 and applicable Toyota service information.
- The supplied bulletin excerpt directs reprogramming of the plug-in charger assembly with the new calibration file, following T-SB-0107-20.
11. When to contact service
Toyota dealer or a qualified service facility should assess P1CE931, particularly because the verified repair information involves plug-in charger assembly calibration programming.
12. What the service center may check
- Check for DTC P1CE931 with approved diagnostic equipment.
- Review Toyota T-SB-0021-21 Rev1 applicability and instructions.
- Perform charger assembly plug-in flash reprogramming only in accordance with Toyota T-SB-0107-20 and the applicable new calibration file.
13. Possible repair or resolution
- Toyota’s verified bulletin excerpt specifies flashing the plug-in charger assembly with a new calibration file.
- Whether this resolves every occurrence, or whether further repair is needed, is not yet established by verified evidence.
14. Affected vehicles
- Toyota RAV4 Prime · 2021 · US
15. Related TSBs / service bulletins
- Toyota T-SB-0021-21 Rev1, dated April 13, 2021; published by NHTSA as manufacturer communication MC-10206537. It addresses DTC P1CE931, “No Signal From the Charging Fan,” and includes a charger assembly plug-in calibration update.
- Toyota T-SB-0107-20, Techstream ECU Flash Reprogramming Procedure, is referenced by T-SB-0021-21 Rev1 for the programming process. Its contents were not supplied.
16. Recall information
- No recall information was supplied or established by verified evidence.
17. Official manufacturer information
Official source: NHTSA manufacturer communication PDF MC-10206537, Toyota T-SB-0021-21 Rev1: https://static.nhtsa.gov/odi/tsbs/2022/MC-10206537-9999.pdf
19. Frequently asked questions
What does Toyota code P1CE931 mean?
The verified Toyota bulletin identifies P1CE931 as “No Signal From the Charging Fan.”
Which vehicle is verified as applicable?
The supplied applicability evidence identifies the 2021 Toyota RAV4 Prime in the United States.
What repair does Toyota specify?
The supplied bulletin excerpt directs technicians to flash reprogram the plug-in charger assembly with a new calibration file, following Toyota T-SB-0107-20.
Is it safe to drive or charge with P1CE931?
Not yet established by verified evidence.