bigdsz

iTrader: (1)

A couple of months ago I simultaineously threw 135 and 155 I figure it must be a glitch and erase them. Two weeks ago I throw 155 and reset it. Today I threw both codes again and reset them. These are the 02 heater codes. The point is can both 02 heaters be screwed up and should I replace both 02 sensors, or could there be a fault in the wiring? I don't see how there could be any shared wiring since codes can be set separately, however it seems like too much of a coincidence for both 02's to have heater problems at the same time. Any ideas?