I have a code P0030 Heater circuit on front oxygen sensor. I had to get the code read at the local parts shop since my reader is kaput and I have no way of reading live data. With the heater circuit causing a cel will that shut down the 02 sensor all together and set the fuel mixture to a fixed value (open loop)? If I clear the codes it returns within the second restart.
2000 V70R
Heated Oxygen Sensor circuit failure
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wizechatmgr
- Posts: 1800
- Joined: 12 Jan 2017, 13:07
- Year and Model: 1999 V70 XC AWD 2.4T
- Location: Albany, NY area
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The heated oxygen sensor may not get hot enough to give a valid reading (one the ECU expects to see) if the heater on it no longer functions.
You should be able to check the heater circuit on the O2 sensor with a multimeter set for ohms (resistance.) If it is infinite ohms, it is toast... If it isn't, then it's time to check the harness, power supply to it, fuses, etc.
You should be able to check the heater circuit on the O2 sensor with a multimeter set for ohms (resistance.) If it is infinite ohms, it is toast... If it isn't, then it's time to check the harness, power supply to it, fuses, etc.
Wisdom requires knowledge as a prerequisite, but knowledge can be developed due to a lack of wisdom.
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
In order to learn how to fix something, you must first learn how to break it.
1999 V70 XC AWD 2.4 T -- ~231k miles
1998 V70 2.4 NA -- ~184k miles
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