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Fix code po161 - 1995 Ford Mustang

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It basically means the PCM detected either an excessive current draw, or an open or short in the circuit powering the oxygen sensor's heater circuit. This is in reference to the Heated Oxygen Sensor (2) located rear of catalytic converter (Bank 2).

Bank 2 is the right side as you look at the egine from the front of the car.

Causes
A code P0161 may mean that one or more of the following has happened:

  • HO2S heater power circuit open
  • HO2S heater ground circuit open
  • HO2S signal tracking (due to oil or moisture in the connector)
  • HO2S is damaged or has failed PCM has failed
Possible Solutions
  • Replace HO2 Sensor
  • Repair open or short in power circuit
  • Repair open or short in ground circuit
  • Repair damaged connector due to tracking

Posted on Nov 13, 2009

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john631068
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SOURCE: fix code po161 on 95 mustang 3.8

P0161(O2 Sensor Heater Circuit (Bank 2 Sensor 2). ...

Posted on Nov 13, 2009

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