Having problems with your Dodge Stratus ?

Bank 1 lower oxygen sensor - replaced with mopar sensor check engine light still on

\015 Bank 1 sensor 2 lower oxygen sensor - replaced with mopar sensor check engine light still on. same code po138 now what?\015 Posted / edited by AnonymousUser on : 13-05-2019

Answers :

Hi Larry:
DTC P0138 - O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)
\012The Heated Oxygen Sensor (2) located rear of catalytic converter \012produces an output signal relative to oxygen storage capacity of \012catalytic converter. Ho2S 2 signal is less active than signal produced \012by front oxygen sensor. This code sets when HO2 Sensor voltage is \012greater than 999 mV for more than 2 minutes (time depends on model. \012Could be as high as 4 minutes)
\012There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.
\012A code P0138 may mean that one or more of the following has happened:
\012 Faulty O2 sensor
\012 Short to battery voltage in O2 sensor signal circuit
\012 High fuel pressure (not as likely)
\012Here are some potential solutions:
\012 Replace O2 sensor
\012 Repair short to battery voltage in o2 sensor signal circuit
\012Check it; hope this helps; also keep in mind that your feedback \012is important and \012I`ll appreciate your time and consideration if you leave some \012testimonial comment about this answer.
\012Thank you for using FixYa, have a nice day.
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