Question about 1996 Jeep Cherokee Country

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Wiring diagram for the o2 senser

1996 jeep cherokee 4.0 auto... just need to know the 4 wire code.. what are the heaters & grond & hot.... thanx ... Gene

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  • Noemi Castillo
    Noemi Castillo Mar 14, 2016

    Theres two o2 sensors bank one and bank two under the jeep and maybe a diagnostic test can tell you a code if the engine light is on..

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I own a 96 jeep cherokee classic and about 12 months ago had similar problem, I managed to find a manual  for sale. Contact your local auto shop and see if they sell a manual for it.
(also try local library as some stock these books for you to borrow or photocopy.)
brand name:  Haynes

name of book:

jeep cherokee
1984 thru 2000
cherokee, wagoneer, comanche and country
Haynes Repair Manual bk no: 50010
Based on a complete teardown and rebuild
cost approx. $40 AU

they have complete wiring diagrams in rear of book

Since buying book husband does 90% of our work himself

Highly recommend
PS: you have good taste in vehicle choice.

Posted on Sep 17, 2008

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I need a radio color diagram for a 1996 jeep grand cherokee


1996 Jeep Grand Cherokee Car Stereo Radio Wiring Diagram.
Car Radio Constant 12V+ Wire: Red/White
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Front Speakers Location: Doors
Left Front Speaker Wire (+): Green
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Sep 18, 2016 | 1996 Jeep Grand Cherokee

1 Answer

Code 0161


if the computer is the correct part number its either the o2 senser or the heater wire is broken where it comes out of the computer test the wire first by checking the risestance from the computer to the o2 senser

Nov 19, 2013 | 2003 Jeep Grand Cherokee Limited

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I have to error code with my jeep grand Cherokee Laredo 1999 the code are 1491,1495,753,136


P1491 Rad Fan Control Relay Circuit An open or shorted condition detected in the radiator fan control relay control circuit. This includes PWM solid state relays.P1495 Leak Detection Pump Solenoid Circuit An open or shorted condition detected in the Leak Detection Pump (LDP) solenoid circuit.P0753 (M) Trans 3-4 Shift Sol/Trans Relay Circuits An open or shorted condition detected in the overdrive solenoid control circuit or Trans Relay Circuit in JTEC RE transmissions. Was MIL code 45. P0753 (M) Trans 3-4 Shift Sol/Trans Relay Circuits An open or shorted condition detected in the transmission 2-4 shift solenoid circuit (4-speed auto. trans. only).P0136 (M) 1/2 O2 Sensor Heater Circuit Malfunction Oxygen sensor heater element malfunction.

Aside from getting into an accident and having your wiring harness severely damaged, the other likely suspect is your PCM. These codes are not related to each other and indicate a much larger problem.

Nov 02, 2013 | 1999 Jeep Grand Cherokee

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I need a wiring diagram for the blower motor on a 1999 jeep grand cherokee limited. I have two wires sticking out of the blower motor and I don't know where they go


Usually you have to splice the wires into the old plug.
You might be able to find a diagram on the websites for auto parts stores such as autozone.

Jul 06, 2012 | 1999 Jeep Grand Cherokee

1 Answer

1996 GRAND CHEROKEE CODE #P0141 AND P0138


Hi there:
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.


Possible Solutions:
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.

Jul 06, 2012 | 1996 Jeep Grand Cherokee

2 Answers

Code poo31 showing and what would be the possible cause and what part to be replaced?


P0031 Oxagen senser heater circuit. The heater circuit can be checked with a test light connected to ground. ( a tast light is an ice pick looking tool with a clear handle with a 12 volt bulb inside and a ware with a clip to connect to grond, the light will light as the tip is touched to anything powered up with 12 volts and sometimes a little more and a wholde lot less) Find the oxagen sensers ( thier screwed into the exhaust pipes) Disconnect the electrial connectors and connect the test light to ground, with the key on test the wires in the plug connect ed the vehical. one of them should light the light, if it does reconect it and test the rest of the sensers, recalling which wire was live. ( most are white or grey but they vary some. If all the sensers have power it's not the power but the senser failed. with an ohm meter test the senser for the wire that was hot to the other wire that is the same color if the sneser is open ( no circuit ) you have found the bad senser. If you can't find power going to any of the sensers. Check the fuse boxes for blown fuses ( check them all with a test light) If you find a blown fuse replace it but go back to the wiring tjat connects to the sensers and you'll find someplace where the wire melted to the exhaust pipes and shorted out, blowing the fuse. The sensers short out too but not very often.

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Starts up fine, then dies ...


check o2 sensers and ground wire to them make sure its no corroded if you have v8 engine the groud is under ac unit.

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