Check engine light code, just bought truck today, please help

SHELDON99

MEMBER
DODGE DAKOTA

Hi there I have a 1999 dodge dakota sport v6 4x4 and my check engine light is on, when I put the code reader on it, it brings UP THIS CODE PO138, first bank second sensor. What does this mean? Can some one tell me were it is and what it does because the truck runs great, thanks so much just, bought the truck today

4 Replies

BMRFIXIT

MECHANIC
19,053 POSTS

Its telling you you need an O2 sensor on bank #1 and the 2nd sensor on that bank
bank #1 is the side where cylinder # 1 is and the sensor is after the converter
Good luck

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Wednesday, October 17th, 2007 AT 8:49 PM

DABOOCRU02

MEMBER
18 POSTS

2000 dodge dakota sport 4x4 V6 3.9 5spd
I just replaced the same O2 sensor for the same error code reading. Post catalytic converter. Fixed the problem for me immediately. Good luck and hope this fixes it for you too!

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Saturday, October 20th, 2007 AT 11:31 AM

DENTRON

MEMBER
2 POSTS

I have a 1996 1500 sport with a 5.2 runs great but the check engine light is on. I check and po138, 141, 441 all show up. All refer to the same o2 sensor. I replace it but the stupid check engine light is still on and the same codes come up. What the !@!#$ Do I do now?

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Wednesday, March 12th, 2008 AT 5:38 PM

BMRFIXIT

MECHANIC
19,053 POSTS

P0138 Oxygen Sensor Circuit High Voltage (Bank 1 Sensor 2)

P0141 Oxygen Sensor Heater Circuit Malfunction (Bank 1 Sensor 2)

P0441 Evaporative Emission Control System Incorrect Purge Flow

did you check the fuses
check wiring
replace o2 sensor

try a different brand

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Wednesday, March 12th, 2008 AT 7:28 PM