timmynuge

A little back story first. My '06 GS450h first displayed the Check Hybrid System lights along with the P0A80 fault around six months ago. I replaced a faulty module in the hybrid battery pack which resolved the issue. Today while driving I heard a chime, and looked down to see the dreaded return of the Check Hybrid System lights. Interestingly, I've noticed that the hybrid battery appears to be charging and discharging as per normal. The car drives fine and I've probably driven the car for about 100kms since the light appeared. I hooked up my OBD2 scanner to retrieve any fault codes, which returned the below: U0293 - Lost Communication with HV ECU P0a7f - Hybrid Battery Pack Deterioration U0100 - Lost Communication With Engine Control Module Has anybody here seen the above codes appearing together or have any idea where to begin in trying to rectify the issue? Sadly starting to think the time has come to finally get rid of the old girl - however would like to clear this issue so I can get a decent trade on it.

Great, thanks for the advice John - will definitely give that a go. My charger will allow for a trickle charge of 2 amps, but do have a bulb I can throw into the circuit. Could I perhaps charge the module with it assembled within the pack (without modules connected of course). Would this provide ample pressure on the sides of the module? Tim

How have other peoples' experiences been with charging up individual modules using a 12V charger? I've got my pack out, with all modules reading ~7.9 with an obvious bad one at 6.6V. My donor module is currently at 7.41V. Should I be bringing this one up to a level closer to the others?