Hey guys,

Quick question for you... Could save me a lot of time/trouble.

I have the AEM Wideband O2 Sensor & afr gauge setup INSTALLED and working. When I installed it, I routed the analog output to my stock ECU. I am getting a CEL code #41 which is either O2 sensor heater malfunction or circuit interruption.

Should the gauge's analog output be working with my stock ECU?

It should be noted that I moved my exhaust manifold O2 sensor to the post Catalytic converter position to replace a broken one. It fit into the harness fine, I don't see why that would be the issue.

 

Do you still have an 02 in the header?

 

Yes, I replaced the O2 sensor in the header with the new wideband one.

 

From AEM:
Q: Do I still need to run my factory exhaust gas sensor if I have an AEM wideband UEGO controller? A: Maybe. If your vehicles Engine Management System uses the O2 sensor for fuel control and you cannot recalibrate it for this different sensor signal, then you will need to retain the factory sensor. If you are running a factory ECU then you will need to continue to send it the factory narrow-band signal or it will throw a Check Engine Light (CEL). Additionally, on emission controlled vehicles in California you MUST retain the unmolested stock emission system for emissions legality.