Technical Stop&Start not working

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Technical Stop&Start not working

xavgdt

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Feb 12, 2024
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Location
Switzerland
Hi all,

On my 2020 Ducato (120 2.3mj Euro6d) the stop&start function worked only a handful of times, and I can't figure out why.
I have read the status of the body computer twice (one month apart) with AlfaOBD and obtained the following

1 month ago
Shutdown inhibition from Stop&Start counters:
Climate control (NCL): 0
Outside temperature below threshold: 223
Outside temperature above threshold: 0
Battery charge below threshold: 0
Driver's seat belt not fastened: 312
Alternator not charged: 91
Bonnet switch: 0
Heated rear window: 0
Windscreen wiper high speed for 5 sec: 0
Battery sensor (IBS): 0
Driver's door open: 3
Battery efficiency below threshold: 138
Semi-automatic Parking Node (SPM): 1659
Battery temperature too low: 0
Battery voltage insufficient for startup: 0
Voltage stabilizer faulty: 14476
A/C manual climate control request: 0
Low consumption power supply mode: 20
S&S NBC startup relay faulty: 0

Now
Shutdown inhibition from Stop&Start counters:
Climate control (NCL): 0
Outside temperature below threshold: 223
Outside temperature above threshold: 0
Battery charge below threshold: 0
Driver's seat belt not fastened: 328
Alternator not charged: 91
Bonnet switch: 0
Heated rear window: 0
Windscreen wiper high speed for 5 sec: 0
Battery sensor (IBS): 0
Driver's door open: 3
Battery efficiency below threshold: 138
Semi-automatic Parking Node (SPM): 1730
Battery temperature too low: 0
Battery voltage insufficient for startup: 0
Voltage stabilizer faulty: 14498
A/C manual climate control request: 0
Low consumption power supply mode: 20
S&S NBC startup relay faulty: 0

It looks to me that the Semi-automatic Parking Node and the Voltage stabilizer faulty counters are disproportionately high, and they are the only one that increased in the past month. However I cannot figure out if they are the culprits and what to do to fix this! Does anyone have any idea?

Additionally I get the readings
Stop&Start: Absent
Start&Stop Presence: Not present


Any idea on what's going on?
 
If it’s still on it’s original battery it might just be that it’s detected that the battery is starting to weaken, start stop is normally the first thing to be disabled as a protection for the battery
 
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