P0135 02 Error X2 - Ok... so what do I do now? - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat

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Old 11-13-2006, 05:00 PM   #1
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Default P0135 02 Error X2 - Ok... so what do I do now?

I know there has been several discussion about this, but I haven't seen much about what this is exactly. Keep in mind, I know next to nothing about the setup of a 3800 engine. Here is what has transpired:

My check engine light came on in my 1996 SLE Bonnie and I went to have the code read at Autozone. it was P0135 x2, now I dont know if this is because of both upper and lower O2 sensors failing or an old code and the current code. I did notice my gas mileage went from almost 30 to 15mpg... since I commute 35 miles a day one way, I'd really like to get this fixed fast :

It is under the used car dealer'* warranty, so he will replace it, but I just want to make sure that things are getting done right.

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Old 11-13-2006, 05:48 PM   #2
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DTC P0135 - HO2S Heater Performance Sensor 1
Your #1 sensor is failing.

The x2 means it recorded it twice already. Get yourself a new O2 sensor, but not a Bosch. Either AC Delco or Denso.
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