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Discussion Starter #1
Hey Im new here and couldnt find any thread but i bought a sensor and changed it. Drove for about 3 miles with the message off and then it turned on again. HELP!

I have a 2014 coupe.
 

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What exact sensor are you referring To? What CEL code do you have?

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Discussion Starter #3
What exact sensor are you referring To? What CEL code do you have?

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I get the check emission system message, thought it was de oxygen sensor, bought it\, replaced it, drove for a couple of miles all good, then light turned on again. Now i get service soon and also the check emission system message again.
 

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You will need to have a code reader to pull the CEL for proper diagnosis.
It is never good to just throw parts at a problem, as you see it didn't solve the issue and now you are out the cash.
If you don't have a code reader, have your local auto parts store pull the code and report back.

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Discussion Starter #7
You will need to have a code reader to pull the CEL for proper diagnosis.
It is never good to just throw parts at a problem, as you see it didn't solve the issue and now you are out the cash.
If you don't have a code reader, have your local auto parts store pull the code and report back.

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Hey so i scanned it. and it shows this:

P1157 HO2S (A/F Sensor) S1 AFS Line Voltage High
P0138 HO2S S2 Circuit High Voltage
 

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Hey so i scanned it. and it shows this:

P1157 HO2S (A/F Sensor) S1 AFS Line Voltage High
P0138 HO2S S2 Circuit High Voltage
The first code is the primary sensor and the second is the secondary.
This leads me to believe there is a wiring problem (broken/shorted wire) as it would be odd to have both sensors fail at the same time.

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