Question about 2008 Subaru Legacy

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I have a 2008 subaru legacy and the check engine light came on along with the cruise control light blinking. I read the error code as P0031 and it says HO2S Bank 1 Sensor 1 Heater Ckt Low. It looks to me there are two 4 wire sensors in the exhaust near the engine. I am told by subaru the first is the A/F sensor and the second is an Oxyben sensor. Is one of these bad and which one?

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6ya6ya
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Posted on Jan 02, 2017

  • 32 Answers

SOURCE: Cylinder 1 misfire on my subaru!!

What you should check first is the spark plug for the #1 cylinder and see if there is a white film on it this would be a sign of a coolant leak which would cause a problem with the O2 sensor

Posted on Oct 11, 2008

ewashmidas
  • 362 Answers

SOURCE: Check engine light and cruise lights came on simultaneously.

Sound like the O2's heater circuit may not be working, that will set a code. I am not a big fan of univeral O2's, too many problems with bad connections and the check engine lights coming back on. You may need to use a OEM type sensor to keep the light off.

Posted on Jan 29, 2009

Rebgagnon
  • 382 Answers

SOURCE: will 1999 subaru engine fit in 1997 subaru legacy?

Yes as long as the Motors are the same. You might need to have the computer out of doner car. Doors are suppose to fit 96 to 99.

Posted on Feb 01, 2009

  • 92 Answers

SOURCE: 1993 subaru legacy brake lights do not work.

simple test light to the stop light switch mounted just above the brake pedal. power in one side push down on the pedal and power should come out the other wire.

Posted on Apr 01, 2009

  • 7 Answers

SOURCE: Engine check light comes on

Have you tried disconnecting the battery for half an hour to reset the computer? If that doesn't work I think the Vacuum Pressure Sensor is in the black box with all the vacuum hoses going to it beside the air filter housing. Not sure tho, subaru will tell you where it is & how to test it if you ring them & ask for the workshop.

Posted on Apr 10, 2009

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