My '99 is throwing code P1135, Heated O2 sensor bank 1 sensor input low. I've been googling to find more, but so far found mostly others with the same question, and not more information. It is a CA car, which complicates things a bit. So is this an O2 or A/F sensor? Anyone know of a definitive source for a replacement? Seems like I could DIY, if I could find the correct part.
Is there a good reference book for the 99's? Even the online parts manuals from mazda seem to skip over the O2 sensors (or perhaps I'm just not find them).
thanks,