P0140 P0141

[Fiction1990]

I kept getting a P420 with a hfc. I tried spacers and didn't work. I found a diode trick and tried that, no more 420 code but now I have the other 2. I thought maybe I had broken the heater wire when I was moving everything around putting in the diode, so I changed the sensor. Brand new bosch and still having same problem. The P0140 doesn't usually set it just stays as pending. What do I need to check besides resistance on the heater circuit?

Thanks

[Fiction1990]

Ok so I figured out which wires go to the Ecm, is there power there all the time or only at cold start?

[Ryanhouck9]

Ok so I figured out which wires go to the Ecm, is there power there all the time or only at cold start?

Did you figure this out? I have the no activity detected code for both downstream sensors after installing high flow cars too, back to stock downpipes with the same issue


Sent from my iPhone using Audizine Forum