Anyone know if it's possible to clear fault codes from a Jumbuck's (my brother's) ECU by disconnecting the battery and if so, how long it needs to be off power. We've found 2 codes for the O2 sensors, one probably caused by us disconnecting the sensors to clean contacts. Trouble is, we can't isolate the problem because the OBD II (cheapo) software we have won't allow us to clear codes without shelling out lots of money. Will

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