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P0140 PLEASE HELP

hippiesrock03

Go Kart Champion
Hey guys,

Been a while since I've posted here but I'm having issues with a CEL Code P0140 - Oxygen (Lambda) Sensor B1 S2: No activity

I bought a new O2 sensor for the post cat (currently have a hi flow eurojet cat). New sensor gives me another code P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1 , S2). I changed spacers as well from RAI J spacer with the smallest bung to a BFI 90° angle one. I checked the O2 sensor wires and made sure everything is connected.

Old sensor - P0140
New sensor - P0140 and P0141.

Could they both be bad? I was extra careful in installing it so I don't twist wires or anything.

What could be the issue??

Sent from my Pixel XL using Tapatalk
 
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