Question about Jeep Cars & Trucks
No year, no joy, all i know is 1996 to 2013
no model stated,,, ouch. wrangler?
this is federal usa spec code P0 are. that.
O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)
Read more at: http://www.obd-codes.com/p0138
the rear oxygen sensor (not front) is sending wrong data.
it reads too high.
this means, 1: the wires to it are cut, burnt, melted or corroded.
or the sensor is bad
i might mean the CAT is bad. (the FSM shows the trip limits.)
since no year, and no car model stated, i cant get exact.
high is 1v, we know that, but is the failure , for over 1v?
if yes, the sensor is blow to bits or not connected.
ill roll the dice (snake eyes) 1996 wrangler, 4.0L , A/T
O2 (B1 S2) Circuit Short to Voltage
Number of Trips to Set Code: 1
Engine started; engine runtime more than 4 minutes, system voltage over 10.5v, ECT Sensor more than 180?F, and the PCM detected the O2 signal was more than 1.50v for 3 seconds.
1.5 v is illegal reading from the 02
O2 means the natural state, of 2 Oxygen atoms. the come in pairs.
what I do is connect my scan tool and plot B1S2 02 sensor
if it reads wrong, i clean and check connections.
ifi it still reads wrong its kicked to the curb (a new one)
hand wired i can get them for $20
PNP from Bosch $50 (plug it in, and play)
Posted on Nov 28, 2013
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Both codes refer at O2 sensor...
DTC P0141 - O2 Sensor Heater Circuit Malfunction (Bank 1, Sensor 2)
This code means that the heated circuit in the oxygen sensor on bank 1 decreases time needed to enter closed loop. As the O2 heater reaches operating temperature, the oxygen sensor responds by switching according to oxygen content of the exhaust surrounding it. The ECM tracks how long it takes for the oxygen sensor to begin switching. It the ECM determines (based on coolant temp) that too much time elapsed before the oxygen sensor began operating properly, it will set P0141. See also: P0135 (Bank 1, Sensor 1).
You will likely notice poor fuel economy the illumination of the Check Engine Light.
A code P0141 may mean that one or more of the following has happened:
open or short to ground in the wiring harness
O2 heater circuit wiring high resistance
O2 heater element resistance is high
Internal short or open in the heater element
Note: Typically a failed catalytic converter does not cause this code. You're more likely to see a P0420 code for a failed converter.
Replace oxygen sensor (cannot repair open or short that occurs internally to sensor)
Repair short or open or high resistance in wiring harness or harness connectors
DTC P0138 - O2 Oxygen Sensor Circuit High Voltage (Bank1, Sensor2)
The Heated Oxygen Sensor (2) located rear of catalytic converter produces an output signal relative to oxygen storage capacity of catalytic converter. Ho2S 2 signal is less active than signal produced by front oxygen sensor. This code sets when HO2 Sensor voltage is greater than 999 mV for more than 2 minutes (time depends on model. Could be as high as 4 minutes)
There may be no noticeable symptoms except for MIL illumination. Possible high fuel pressure can over rich the system.
A code P0138 may mean that one or more of the following has happened:
Faulty O2 sensor
Short to battery voltage in O2 sensor signal circuit
High fuel pressure (not as likely)
Here are some potential solutions:
Replace O2 sensor
Repair short to battery voltage in o2 sensor signal circuit.
Hope this helps; also keep in mind that your feedback is important and I'll appreciate your time and consideration if you leave some testimonial comment about this answer.
Thank you for using Fixya, and have a nice day.
Posted on Jul 06, 2012
Tips for a great answer:
Jul 10, 2011 | 1997 Toyota Avalon
P0455....Evaporative Emission Control System Leak Detected (gross leak)
P0138....O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)
Jan 13, 2011 | 2001 Dodge Ram 2500 Truck
Sep 15, 2010 | 2002 Jeep Grand Cherokee
Aug 01, 2008 | 2000 Dodge Durango
173 people viewed this question
Usually answered in minutes!