28.07.2026, 23:08
Hi Freesker Team,
thanks for responding so quickly.
I did what you asked to do:
1. ran the DTC report, see report (1).pdf
=> active fault for Radar Module -Front center (MRR) - Component Failure with DTC Code: C21A909 and DTC Status 0x09
=> MRR Midrange radar module 0 faults
2. ran the software version check for MRR: failed, OS unknown
3. I hard reset the Hydra and the MRR
4. then let deep sleep
5. ran the DTC report again, see report (2).pdf
=> same as in step 1., i.e. active fault for Radar Module -Front center (MRR) - Component Failure with DTC Code: C21A909 and DTC Status 0x09
but: => MRR Midrange radar module (failed), see MRR software check 1 (before reset and deep sleep).jpg
6. 3. I hard reset the Hydra and the MRR again
7. simply ran the DTC report again, see report (4).pdf
=> active fault for Radar Module -Front center (MRR) - Component Failure with DTC Code: C21A909 and DTC Status 0x09 (DTC failed at the time of request)
=> MRR Midrange radar module 0 faults
8. ran the software version check for MRR: surprisingly it now was showing the software version
What I also noticed is that in the scripts for MRR, the button Read SEC_OC is active dark blue, but there is a red X right next to the "Read SEC_OC" => what does that mean?
(file Scripts for MRR_Read SEC_OC - failed.jpg)
To me it looks as if the MRR does respond occasionally - maybe there's a timeout issue?
Still all the time the red error symbol for the ADAS is on / won't get off, but again, the Front collission assistant with active breaking does work all the time (and isn't that one using the Radar Module -Front center (MRR) module?)
Any more idea about a procedure / what to do next - what would you recommend?
My thought: Is there a function to fully teach-in and re-calibrate this Radar Module -Front center (MRR) module fully freshly?
If that doesn't work simply replace that piece of a hardware module by a new one, with checking/replacing any connector with it. The main connector in the front right area in front of the wheel (the grey one) has already been fully replaced - it was really corroded (known Fisker Ocean bad engineering issue with water from windscreen spilling all over it continuously)
THANKS AGAIN FOR YOUR ADVICE - always highly appreciated!
thanks for responding so quickly.
I did what you asked to do:
1. ran the DTC report, see report (1).pdf
=> active fault for Radar Module -Front center (MRR) - Component Failure with DTC Code: C21A909 and DTC Status 0x09
=> MRR Midrange radar module 0 faults
2. ran the software version check for MRR: failed, OS unknown
3. I hard reset the Hydra and the MRR
4. then let deep sleep
5. ran the DTC report again, see report (2).pdf
=> same as in step 1., i.e. active fault for Radar Module -Front center (MRR) - Component Failure with DTC Code: C21A909 and DTC Status 0x09
but: => MRR Midrange radar module (failed), see MRR software check 1 (before reset and deep sleep).jpg
6. 3. I hard reset the Hydra and the MRR again
7. simply ran the DTC report again, see report (4).pdf
=> active fault for Radar Module -Front center (MRR) - Component Failure with DTC Code: C21A909 and DTC Status 0x09 (DTC failed at the time of request)
=> MRR Midrange radar module 0 faults
8. ran the software version check for MRR: surprisingly it now was showing the software version
What I also noticed is that in the scripts for MRR, the button Read SEC_OC is active dark blue, but there is a red X right next to the "Read SEC_OC" => what does that mean?
(file Scripts for MRR_Read SEC_OC - failed.jpg)
To me it looks as if the MRR does respond occasionally - maybe there's a timeout issue?
Still all the time the red error symbol for the ADAS is on / won't get off, but again, the Front collission assistant with active breaking does work all the time (and isn't that one using the Radar Module -Front center (MRR) module?)
Any more idea about a procedure / what to do next - what would you recommend?
My thought: Is there a function to fully teach-in and re-calibrate this Radar Module -Front center (MRR) module fully freshly?
If that doesn't work simply replace that piece of a hardware module by a new one, with checking/replacing any connector with it. The main connector in the front right area in front of the wheel (the grey one) has already been fully replaced - it was really corroded (known Fisker Ocean bad engineering issue with water from windscreen spilling all over it continuously)
THANKS AGAIN FOR YOUR ADVICE - always highly appreciated!