engine light

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fred - 15 Sep 2005 02:21 GMT

hey guys , engine light came on about a month ago with the warning
code P0138 HO2S. then it went away after one day. well now its back
P0138 HO2S
Circuit High Voltage Bank 1 Sensor 2 , would anyone care to give me
any advice on what this would mean. thanks guys

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Tom Lawrence - 15 Sep 2005 03:44 GMT

> code P0138 HO2S. then it went away after one day. well now its back
> P0138 HO2S
> Circuit High Voltage Bank 1 Sensor 2 , would anyone care to give me
> any advice on what this would mean. thanks guys

It means the post-cat O2 sensor is reporting a rich condition. This could
be caused by your cat converter not doing it's job, or by the O2 sensor
being covered in crud, it's wiring compromised, or the sensor is just plain
broke.

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fred - 16 Sep 2005 16:42 GMT

thanks tom appreciate the reply

>> code P0138 HO2S. then it went away after one day. well now its back
>> P0138 HO2S
[quoted text clipped - 5 lines]
>being covered in crud, it's wiring compromised, or the sensor is just plain
>broke.

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leemn - 16 Sep 2005 20:01 GMT

my 2000 ram has the same problem with that code P0138 now it shows two
sensors is it the one in front of the cat. or behind it.

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