Question about 1996 Jeep Grand Cherokee

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I get a code error of PO132. Can you tell me what this means

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  • Jeep Master
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Bank 1 O2 sensor 1 high voltage reading. usually caused by faulty sensor. Can also be a short in the sensor wiring. Check wiring for pinch or melted insulation. Check connector pins.
Sensor is circled below.I get a code error of PO132.   Can you tell me - 472d330.gif

Posted on Oct 01, 2010

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Posted on Jan 02, 2017

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jturcotte
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SOURCE: 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.

Posted on Nov 02, 2011

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