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Old 02-08-2018, 04:02 PM   #1
Formula 5000 Driver
hippiesrock03's Avatar
Drives: 2011 MK6 GTI
Join Date: Dec 2011
Location: Raleigh, NC
Posts: 1,539

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??

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