1995 Ford Mustang Logo
Posted on Nov 13, 2009
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Fix code po161 - 1995 Ford Mustang

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Anonymous

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  • Master 2,049 Answers
  • Posted on Nov 13, 2009
Anonymous
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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

1 Related Answer

Anonymous

  • 172 Answers
  • Posted on Nov 13, 2009

SOURCE: fix code po161 on 95 mustang 3.8

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

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I'm looking at the code book and ALL codes are 4 digit codes, EX POO56, POO57 and PO161. If these are What you are getting, they all are codes for the left and right hand oxygen sensors. Could be wiring, Sensor itself or ECM
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Fix code po161 on 95 mustang 3.8

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