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Code P0138

6K views 1 reply 2 participants last post by  RamTech 
#1 ·
Okay I know this is the code for an oxygen sensor and I believe it is bank 1 sensor 2. Just wondering if anyone can tell me exactly where this is located. Just to be clean it is the 5.9 in a 2002 dodge ram 1500 sport. Figured eveyone would know it is this engine since it is posted in this forum just wanted to be sure so no one asks what engine it is. Thanks for any help anyone can give me.
 
#2 ·
That's the drivers side downstream sensor.

Possible causes:
(K141) O2 1/2 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(K904) O2 RETURN DOWNSTREAM CIRCUIT SHORTED TO VOLTAGE
(K141) O2 1/2 SENSOR SIGNAL CIRCUIT OPEN
(K904) O2 RETURN DOWNSTREAM CIRCUIT OPEN
1/2 O2 SENSOR
POWERTRAIN CONTROL MODULE (PCM)
 
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