error code p0138 what to do ?

otherside · #1 08-12-2007, 07:22 AM

The check engine light is on and when I turn the key to get the code it gives me P0138.
for thecode P0138 i ve findfollow" 02 SENSOR CIRCUIT HIGH VOLTAGE BANK 1 SENSOR 2" ! ist that right for a 2003 Dodgeram with the 5.7 hemi .
and what i have to do !

Thanks
martin

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rch105 · #2 08-21-2007, 09:50 PM

Martin,
I have the same code...only and always happens when it gets rainy or wet. From what I can tell, this is the right rear downstream O2 sensor. (The one after the CAT). Hope this helps.

hemiyellow · #3 08-21-2007, 10:25 PM

O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)thats right....try replacing the sensor....not very expensive

rch105 · #4 08-21-2007, 11:27 PM

Hey HEMIYELLOW,
Just how many O2 sensors are there? And just what do you call the right side? Is that the 2-4-6-8 cylinder side? Tnx

DeWalt378G · #5 08-22-2007, 12:07 AM

i had this code too a while ago. turns out it wasa loose harness, so check your harness before you go replacing your sensor.

hemiyellow · #6 08-22-2007, 12:11 AM

on the 5.7 there's 4...i dunno bout the 4.7 but i would assume 4 as well.....too lazy to find my service manual CD's and look lol

hemiyellow · #7 08-22-2007, 12:52 AM

i've always known right side as driver side....bank 1 i'm pretty sure is driver side, bank 2 is pass side

kenihemi · #8 08-22-2007, 12:13 PM

Bank 1 is pass side, sensor #2 is the rear one.

rch105 · #9 08-22-2007, 05:15 PM

Now I'm really confused! Left, Right, Bank 1, Bank 2. Help!

kenihemi · #10 08-22-2007, 07:12 PM

I stand corrected and a little embarassed.

Just checked the manual and bank 1 is the driver side.

The 04 hemi has 2 cats, therefore 4 sensors.

When I last looked this up it was for my 98 dak with only 1 cat.