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:
Trouble Code Conditions:
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.
- O2 signal tracking (wet/oily) in connector due to short from signal to power circuit
- O2 signal circuit is open
- O2 ground circuit is open
- O2 is damaged or it has failed
- PCM has failed (never,will it be ,here.....well protected , im sure.)
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)