Question about 1993 Jeep Grand Cherokee

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I ifound my O2 sensor with 5 inches of lead cut and frayed( 4 conds) cannot locate where this now cut cable ran to. Like a female connector or maybe even a cable w 4 conds in it dangling maybe the female got pilled out back to tne harness if so whatr harness does the female connectror spring from. and where/how/what direction does it run this might help me locate the dangling connectorr if it still exists

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  • Jeep Master
  • 6,982 Answers

Likely the wires tore out of the connector. That should be somewhere in front of the sensor, attached to the floor board. New sensors are sold with and without the connector attached. Best to buy one pre-built to avoid getting the wires in the wrong positions (only a few $ more than "universal" type). When installing, route the wiring away from the exhaust and make sure it does not hang down.
Once installed, check the fuses in the power distribution center and make sure none are blown. (can happen if one of the wires shorted when they pulled out).

Posted on May 26, 2011

Testimonial: "IVE BEEN UNDER THE CAR 3 TIMES TODAY TRYING TO LOCATE A DANGLING LEAD TO REATTATCH THE SENSOR TO UR QUICK RESPONSE VERY HELPFUL THANK YOU"

  • Richard Scordino May 27, 2011

    If I remember correctly the actual harness extension goes into the same main harness that is attached to all other sensors as well as the fuel injectors. Most if not all the one's i've seen are attached to the body or cross member for the transmission, just ahead of the sensor location on the pipe. Pretty sure but not positive that the harness runs up over the top of the transmission.

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3 Answers

Is p0052 a fuse problem or a o 2 sensor


P0052 DTC trouble code may be caused by one or more of the following:
A short in the heater circuit in the sensor.
A failed O2 sensor heater.
Wiring/connectors broken/frayed leading to sensor and/or relay.
Failed PCM/ECM.

Jan 01, 2015 | Cars & Trucks

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How to Test the O2 Sensor of Bentley Arnage car?


O2 sensor needs to be replaced when you get low gas mileage in car.
So before replacing the sensor it needs to be tested.
The procedure to test O2 sensor is as follows: ---
1) First drive the vehicle for 15 minutes in normal temperature.
2) Then Stop the vehicle in park mode and turn the engine off.
3) You will see primary O2 sensor on the exhaust manifold, the manifold will be very hot to touch so take care.
4) The function of O2 sensor in the car is to measure the amount of oxygen in car and then send that information to engine to adjust fuel pressure.
5) Now to measure the O2 sensor reading. Carefully disconnect the wire at the O2 connector, and hook the positive lead of volt meter to the O2 sensor side of the connector and connect the positive lead of volt meter to harness side of the connector.
6) In the O2 sensor you will notice two black wires that are not used for testing.
7) Now before beginning the important part of the testing procedure, check out properly that wires of O2 sensor and wires of volt meter are not getting touch to any other metal part or the manifold.
8) After checked and confirmed. Now start the car and see the voltage in engine idle position.
9) The reading will go high or go low but the average reading that it should show is 500 mV.
10) Now let the engine run and with engine running disconnect the fuel pressure regulator vacuum hose, and plug the hose with your finger.
11) The 500 mV reading will go to 700-800 mV.now remove the finger the reading will fall low to 300 mV.
12) But if these readings are not showing properly that indicates the fault in the sensor.
13) The secondary O2 sensor is located after the catalytic converter. The procedure to measure secondary O2 sensor is exactly the same like how you measured the primary O2 sensor.
14) The secondary oxygen sensor is located under the car.
15) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
16) You can test secondary O2 sensor to conform the fault before replacing the O2 sensor.
17) The cost of replacing the O2 sensor is near to $100.This cost is for if you do it yourself.
This will help. Thanks.

on Mar 22, 2010 | Bentley Arnage Cars & Trucks

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How to Test the O2 Sensor of Cadillac Devile car?


O2 sensor needs to be replaced when you get low gas mileage in car.
So before replacing the sensor it needs to be tested.
The procedure to test O2 sensor is as follows: ---
1) First drive the vehicle for 15 minutes in normal temperature.
2) Then Stop the vehicle in park mode and turn the engine off.
3) You will see primary O2 sensor on the exhaust manifold, the manifold will be very hot to touch so take care.
4) The function of O2 sensor in the car is to measure the amount of oxygen in car and then send that information to engine to adjust fuel pressure.
5) Now to measure the O2 sensor reading. Carefully disconnect the wire at the O2 connector, and hook the positive lead of volt meter to the O2 sensor side of the connector and connect the positive lead of volt meter to harness side of the connector.
6) In the O2 sensor you will notice two black wires that are not used for testing.
7) Now before beginning the important part of the testing procedure, check out properly that wires of O2 sensor and wires of volt meter are not getting touch to any other metal part or the manifold.
8) After checked and confirmed. Now start the car and see the voltage in engine idle position.
9) The reading will go high or go low but the average reading that it should show is 500 mV.
10) Now let the engine run and with engine running disconnect the fuel pressure regulator vacuum hose, and plug the hose with your finger.
11) The 500 mV reading will go to 700-800 mV.now remove the finger the reading will fall low to 300 mV.
12) But if these readings are not showing properly that indicates the fault in the sensor.
13) The secondary O2 sensor is located after the catalytic converter. The procedure to measure secondary O2 sensor is exactly the same like how you measured the primary O2 sensor.
14) The secondary oxygen sensor is located under the car.
15) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
16) You can test secondary O2 sensor to conform the fault before replacing the O2 sensor.
17) The cost of replacing the O2 sensor is near to $100.This cost is for if you do it yourself.
This will help. Thanks.

on Mar 22, 2010 | Cadillac DeVille Cars & Trucks

1 Answer

How do I test the female end of 3 wire O2 sensor that o2 sensor plugs into? It is the one that comes from the battery to plug located on end of O2 sensor


with the O2 connected on a 3 wire sensor you should have a ground a battery supply and a ecm voltage of 4.5.with it running the sensor voltage(4.5) should fluctuate above and below the 4.5 volts when its in closed loop. if you don`t have one or any of these voltages then you will need to check from the connector back to where the voltages/ground is supplied, which is the ecm.

Nov 29, 2013 | Cars & Trucks

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How to Test the O2 Sensor of Acura Integra car?


O2 sensor needs to be replaced when you get low gas mileage in car.
So before replacing the sensor it needs to be tested.
The procedure to test O2 sensor is as follows: ---
1) First drive the vehicle for 15 minutes in normal temperature.
2) Then Stop the vehicle in park mode and turn the engine off.
3) You will see primary O2 sensor on the exhaust manifold, the manifold will be very hot to touch so take care.
4) The function of O2 sensor in the car is to measure the amount of oxygen in car and then send that information to engine to adjust fuel pressure.
5) Now to measure the O2 sensor reading. Carefully disconnect the wire at the O2 connector, and hook the positive lead of volt meter to the O2 sensor side of the connector and connect the positive lead of volt meter to harness side of the connector.
6) In the O2 sensor you will notice two black wires that are not used for testing.
7) Now before beginning the important part of the testing procedure, check out properly that wires of O2 sensor and wires of volt meter are not getting touch to any other metal part or the manifold.
8) After checked and confirmed. Now start the car and see the voltage in engine idle position.
9) The reading will go high or go low but the average reading that it should show is 500 mV.
10) Now let the engine run and with engine running disconnect the fuel pressure regulator vacuum hose, and plug the hose with your finger.
11) The 500 mV reading will go to 700-800 mV.now remove the finger the reading will fall low to 300 mV.
12) But if these readings are not showing properly that indicates the fault in the sensor.
13) The secondary O2 sensor is located after the catalytic converter. The procedure to measure secondary O2 sensor is exactly the same like how you measured the primary O2 sensor.
14) The secondary oxygen sensor is located under the car.
15) Put the car on jack stands on the rack, this will give you proper sensor location in the car.
16) You can test secondary O2 sensor to conform the fault before replacing the O2 sensor.
17) The cost of replacing the O2 sensor is near to $100.This cost is for if you do it yourself.
This will help. Thanks.

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1 Answer

Code P0134 O2 Sensor Circuit No Activity Detected Bank 1 Sensor 1


A code P0134 may mean that one or more of the following has happened:
  • Bad O2 (oxygen) sensor
  • Bad heater circuit in the O2 sensor
  • Wiring or connector to the sensor frayed / broken
  • Blown heater circuit fuse
  • Holes in the exhaust system
  • PCM failure

May 16, 2012 | Cars & Trucks

2 Answers

2000 acura tl engine code PO132 what does it mean


Oxygen sensor circuit issues. Check wiring for possible melted insulation or bad connection at connector.If wiring looks good run tests to diagnose. Sensor one, bank one is below the exhaust manifold on the passenger side of the engine.

TESTING4-WIRE SENSOR
4-wire sensors are HO2 sensors.
On 4-wire sensors, one of the connector terminals is the SOUT, one of the terminals is the SGND, one of the terminals is the HPWR and the other is the HGND. To identify the 4 terminals, perform the following:
  1. Locate the O2 sensor (#2 in pic below) and its pigtail connector. It may be necessary to raise and safely support the vehicle to gain access to the connector.
jturcotte_2458.gif
  1. Disengage the sensor pigtail connector from the vehicle harness connector.
  2. Using a DVOM set to read 12 volts, attach the DVOM ground lead to a good engine ground.
  3. Have an assistant turn the ignition switch ON without actually starting the engine.
  4. Probe all 4 terminals in the vehicle harness connector. One of the terminals should exhibit 12 volts of power with the ignition key ON; this is the HPWR terminal.
    1. If the HPWR terminal was identified, note which of the sensor harness connector terminals is the HPWR, then match the vehicle harness connector to the sensor pigtail connector. Label the corresponding sensor pigtail connector terminal with HPWR.
    2. If none of the terminals showed 12 volts of power, locate and test the heater relay or fuse. Then, perform Steps 2-6 again.

  1. Have your assistant turn the ignition OFF
  2. Using the DVOM set to measure resistance (ohms), attach one of the leads to the HPWR terminal of the sensor pigtail connector. Use the other lead to probe the 3 remaining terminals of the sensor pigtail connector, one at a time. The DVOM should show continuity with only one of the remaining unidentified terminals; this is the HGND terminal.
    1. If continuity was found with only 1 of the 2 unidentified terminals, label the HGND terminal on the sensor pigtail connector.
    2. If no continuity was evident, or if continuity was evident from all unidentified terminals, the O2 sensor is defective.
    3. If continuity was found at 2 of the other terminals, the sensor is probably defective. However, the sensor may not necessarily be defective, because it may have been designed with the 2 ground wires joined inside the sensor in case one of the ground wires is damaged; the other circuit could still function properly. Though, this is highly unlikely. A wiring diagram is necessary in this particular case to know whether the sensor was so designed.

Reattach the sensor pigtail connector to the vehicle harness connector. Start the engine and allow it to warm up to normal operating temperature, then turn the engine OFF. Using a DVOM set to read 100-900 mV (millivolts) DC, backprobe the negative DVOM lead to one of the unidentified terminals and the positive lead to the other unidentified terminal.

CAUTION While the engine is running, keep clear of all moving and hot components. Do not wear loose clothing. Otherwise severe personal injury or death may occur.
  1. Have an assistant restart the engine and allow it to idle.
  2. Check the DVOM for voltage.
    1. If no voltage is evident, check your DVOM leads to ensure that they are properly connected to the terminals. If still no voltage is evident at either of the terminals, either the terminals were accidentally marked incorrectly or the sensor is defective.
    2. If voltage is present, but the polarity is reversed (the DVOM will show a negative voltage amount), turn the engine OFF and swap the 2 DVOM leads on the terminals. Start the engine and ensure that the voltage now shows the proper polarity.
    3. If voltage is evident and is the proper polarity, the positive DVOM lead is attached to the SOUT and the negative lead to the SGND terminals.
  1. Have your assistant turn the engine OFF.
  2. Label the sensor pigtail SOUT and SGND terminals.
REMOVAL and INSTALLATION
WARNING The sensors use a pigtail and connector. This pigtail should not be removed from the sensor. Damage or removal of the pigtail or connector could affect proper operation of the oxygen sensor. Keep the electrical connector and louvered end of the sensor clean and free of grease. NEVER use cleaning solvents of any type on the sensor! The sensor may be difficult to remove when the engine temperature is below 120°F (48°C). Excessive removal force may damage the threads in the exhaust manifold or pipe; follow the removal procedure carefully.
  1. Make sure the ignition is OFF, then disconnect the negative battery cable.
  2. Locate the oxygen sensor. It protrudes from the exhaust manifold or exhaust pipe (it looks somewhat like a spark plug). It may be necessary to raise and safely support the vehicle to access the sensor.
  3. Unplug the sensor electrical connector.
jturcotte_2459.gif

Fig. Fig. 5: Loosen the oxygen sensor using a wrench as shown, or use a sensor socket made especially for that purpose

  1. Carefully unscrew the sensor, then remove the oxygen sensor from the manifold or pipe.

To install:
  1. During and after the removal, be very careful to protect the tip of the sensor if it is to be reused. Do not let it to come in contact with fluids or dirt. Do not clean it or wash it.
  2. Apply a coat of anti-seize compound to the bolt threads but DO NOT allow any to get on the tip of the sensor.
  3. Install the sensor in the manifold or exhaust pipe.
  4. Attach the electrical connector and ensure a clean, tight connection.
  5. If raised, carefully lower the vehicle.
  6. Connect the negative battery cable.

Nov 02, 2011 | 2000 Acura TL

1 Answer

What does P032 mean during the on board diagnostic test. I have a 2006 jeep cherokee laredo


  • P0032 is almost always a faulty heat circuit for the O2 sensor, but there can be other causes:

  • A short in the heater circuit in the sensor
  • A failed O2 sensor heater
  • Wiring/connectors broken/frayed leading to sensor and/or relay
  • Failed PCM/ECM

Mar 03, 2011 | 2001 Jeep Cherokee

1 Answer

2001 Crown Vic 4.6 has code P350 misfire # 5. Injector is good, Coil and boot is good, has a new plug. I have great mechanical skills but this one has me stumped. I did hear that these cars had a well...


Did you mean PO305 for cyl #5 ?

You say boot is good
What about the coil,correct me
if I'am wrong, but you do have COP
Coils!

A PO305 doesn't alway give exact results,
if you have multiple codes but for a $60.00
coil should end the misfire.

You already know to:
Check for vacuum leaks
Clean throttle plate
Clean MAF
Replace front (2 ) O2 sensors at 100,000

Feb 01, 2011 | Ford Crown Victoria Cars & Trucks

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