Originally posted by Munson:
PA3L: codes I got were P1131 (bank 1 lean yada yada) and P070 (bank 1 lean yada yada). Unfortunately in my haste to explore the nether regions of OBDII, I managed to accidentally erase the freeze data. Oops. Anyway, doing a little search on these codes, it seems like the upper rear 02 is on the blink, or maybe the connector is acting up. Anyone know where I can rent a midget to get back in bank 1's exhaust manifold?
I'd list the possible causes from the manual for P1131, but the first paragraph really says it all:
Diagnostic Trouble Code (DTC) P1131 bank 1 (Cylinder 1) indicates the fuel/air ratio is correcting rich for an overly lean condition. The HO2S voltage is less than 0.45 volt.
Hook up that scan tool after taking about a 10 minute drive. If the O2 value on Bank 1 isn't oscillating around 0.45 (instead staying below 0.45) then you've found your problem. Bad sensor or bad connection.
Dunno what to say about the other code (it's missing at least one digit).
