Volvo C70 This sporty coupe has a three-piece retractable hardtop for unsurpassed fun whether the the top is up or down.

02 sensor circuit no activity.

  #1  
Old 03-24-2018, 11:48 AM
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Default 02 sensor circuit no activity.

Hi All.

As previuosly posted looking at the fault codes on my newly acquired 2002 C70 2.0T convertible.

Im getting the above coming up (o2 sensor circuit no activity) and also HO2S heater control circuit bank 1 sensor 1.

Are these two two tied up do you think? Would this be the O2 sensor broken or more likely a wiring fault do think?

Any hints, tips etc gratefully received.

Andi
 
  #2  
Old 03-24-2018, 12:23 PM
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Location: Ridgefield, CT
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yes these cars use a four wire O2 sensor - two for the heater element and two for the sensor. If you are getting faults on both, I'd look to see if the connector is ok or if there's any wiring damage under the car. (thinking the PO may have run over something that tugged on the wires)
 
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