I have a 2004 srx v8. ran the codes because of the engine light was on. I know what the codes stand for but not what would be the cause. my STFTRM1 = between -14 to -21. LTFTRM1=12.5, STFTRM2=-17 TO-12. LTFTRM2 14.8. my MAF flow GR/S=5.00. MAP KPA =34. BARO PRS KPA=99. (all at an idile and about 35 degrees out with a warm engine). I am not sure if these measurements are with in spec but one other thing I realized that my CAT TEMP 11 AND CAT TEMP 21 both read -40 which does not seem right but does not throw any codes for this. I cleared the 2 codes rich bank codes and took it for a 12 mile drive without it throwing a code.. Anyone have any input to might be wrong?

 

Degraded o2 does O2 voltage cycle from .05-.95? If O2 has a narrow range could cause your condition.