Question about 1996 Volvo 850

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I took my car to autozone to get the OBDII code. He said it was a O2 sensore but did not know which one? Also is it a 2 wire or 3 wire O2 Sensor for a 1996 850 Turbo?

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When the codes are read they generally have an identifying number for the Oxygen sensors. For instance: "B1S1" This means" exhaust bank one, sensor one. THe first sensor of your first bank.

Your VOLVO 850 is an inline 5-cylinder, so it has just one exhaust bank I believe. So it should have an Oxy sensor upstream and one downstream of the catalytic converter. The upstream one is sensing lean/rich condition of your just-burned fuel mixture, while the downstream one measures efficiency of your catalytic converter. I suggest you go somewhere else to have the car checked and scanned. Nothing against the parts dealers, but those guys are barely cashiers, as you found out. It was free right? Worth just what you paid for it, nothing!!! Maintain your Volvo so it will take care of you for years to come.

Posted on Jan 27, 2009


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Yes. If the O2 sensor is faulty, it can tell the computer the fuel mixture is too rich when in fact is is too lean.

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I have a 2010 Chevy HHR I took it to Autozone to get check and they told me that it take o2 oxygen sensor heater condition code p0054?? And now my car runnig rough... Sad.....

Code 54 is for a problem with the heater circuit for the O2 sensor that is mounted after the catalytic converter. The problem could be the sensor or the wiring for the heater circuit in the sensor. The circuit would need to be tested.

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I have a 2003 Mountaineer v-8 AWD with "check

Left side,Drivers side

Either in the converter inlet or just ahead if it

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Bank (2) Drivers Side
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An O2 Code does not mean it is bad or needs to be replaced.
Could be any number of other causes that set a MIL Lamp
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Reccieved P0141, P0147, P0340 as emission diagnostic trouble codes. What do these mean?

P0141....O2 Sensor Heater Circuit (Bank 1 Sensor 2)

P0142....O2 Sensor Circuit Malfunction (Bank 1 Sensor 3)

P0143....O2 Sensor Circuit Low Voltage (Bank 1 Sensor 3)

P0144....O2 Sensor Circuit High Voltage (Bank 1 Sensor 3)

P0145....O2 Sensor Circuit Slow Response (Bank 1 Sensor 3)

P0146....O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 3)

P0147....O2 Sensor Heater Circuit (Bank 1 Sensor 3)

P0340....Camshaft Position Sensor 'A' Circuit (Bank 1 or Single Sensor)

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I have a 98 Hyundai accent. Won't accelerate over 50mph

the o2 sensor will cause overfuelling and an improper throttle position.
the heater circuit has 12v,and the other 2 wires are a reference voltage.
you need to use a scanner and look at the live data to see what the 02 sensor is doing.
after battery disconnect,the monitors have to set using a drive cycle of which you can get from hyundai.Typically to set the 02 heater circuit,the car has to idle for 2 minutes when cold,and then drive at 55mph for 3 minutes with the a/c on.

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My 2005 pathfinder service engine light just came on. i took it to autozone an the diagnostic codes they gave me were P1051 and P1168. I wanted to know what they were B4 i took it in to the dealer and they...

P0151 Front O2 Sensor, Bank 2 Lean Shift Monitoring,P1168 Closed Loop, Bank 2 i would do the o2 sensor on this side..and thats it unless you get something else

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I have a 2001 Santa Fe and the Engine light is lit and has been for many years. When I took the vehicle for the State Inspection I was told that the Co2 needed to be changed so the light would come off and...

The best thing to do is go to Auto Zone and get your Hyundai scanned for a DTC code. That would tell us which O2 sensor has gone bad. You have three O2 sensors and one of them has gone bad, the O2 sensor sends signals to the ecm to control the air fuel mixture so it will not run to rich or to lean which is causing you to fail the state inspection. Good luck and keep me posted on what the DTC codes are, be glad to help.

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P0155 OBDII code refers to HO2S heater circuit - bank 2 sensor 1 , not knowing your engine size and engine vin code thats about as far as we can go with our answer . we can say bank 2 sensor 1 is the passenger side upstream oxygen sensor has a heater circuit problem , could possibly be a bad oxygen sensor . you ask what is that - thats what it is ... cheers .

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