Low Voltage While Flashing OBD2
06-13-2012, 03:23 PM
#1
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Low Voltage While Flashing OBD2 I took my car to a shop to get a retune. I noticed that a charger was hooked up to the car and i asked why. The front desk person told me it is so the voltage doesn't drop below 12.2 volts. Because if it does it messes up the computer. While flashing it I guess. Is there any truth to this?
06-13-2012, 03:56 PM
#2
If the PCM loses voltage during a write then yes. I don't know what the cut off is, I don't think it is as high as 12.2. My HP Tuners won't connect below 11.8, IIRC.
It's always a good idea to connect the car battery to a charger while writing to the PCM.
It's always a good idea to connect the car battery to a charger while writing to the PCM.
