Question about 1996 Saturn SL

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Saturn heat sensor check engine light on.

Is it possible to change the heat sensor without disconnecting the negative battery cable and still have it work?

Posted by Anonymous on

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  • Contributor
  • 52 Answers

No, it's advisable to disconnect the negative battery cable. Why do you wish to experiment?

Posted on Jul 23, 2013

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Posted on Jan 02, 2017

  • 71 Answers

SOURCE: Coolant Leak in 1997 Saturn SL1

if there is no heat coming from the vents i would bleed the coolant system for air, usually trapped air in the system will cause this lack of heat.

Posted on Nov 27, 2008

  • 7353 Answers

SOURCE: 2006 Saturn Relay Check Engine Light

PO455 is a large evaporative fuel leak. A bad fuel cap is ONE of the things that COULD be the problem. Fuel system cleaning only lightened your wallet. Reading your post is confusing. Did all this start AFTER the Valvoline Wallet Flushing? If so , they left something loose or disconnected. I would find a qualified repair shop to fix the problem, and if it has anything to do with what Valvoline did, make them pay the bill.

Posted on Nov 12, 2009

ZJLimited
  • 17970 Answers

SOURCE: 2002 Saturn SL1 check engine light code P0303

For old models, Saturn/GM also used the same material fiberglass gasket in your model, you almost certainly have a leak from a crumpled, sucked-in gasket as I suffered (and many others). I would say going to Saturn dealership to make repairs is probably not good idea if they are going to put in the same GM intake gasket part. Maybe possible to specify Felpro gasket with whatever shop you go to if you don't do the repair yourself. I would not go too long with your car in that condition as there is localized leaning at your cyl-3, that could cause a burnt exhaust valve there.

The exhaust is extra hot venting out that cylinder. P0303 is misfire at cyl-3. Mine was P0301 (cyl-1). You may get P0507 once in a while when PCM fails to control the fast idle caused by the leak under certain conditions. Most of the time, it is very slow idle caused by 3 cylinders running. You run smoother in cold idle because the IAC opens up to increase idle and end up lowering the manifold vacuum, so the reduced vacuum causes less leaking at the failing intake manifold gasket.

I'd say try cleaning everything with your ignition before replacement; Idle problems could be caused by engine coolant sensor (ECTS). Are you sure it was changed? Did they put on a new wire connector along with it?

Hope helps.

Posted on Dec 29, 2009

  • 543 Answers

SOURCE: I have a 2000 Saturn

did you replace the engine coolant temp sensor and harness?that will set a p0341,p0340 code and cause hard.no start as it misreads and dumps too much gas,,,,,the sensor is plastic and sits inside the head and crakcs and leaks into the harness and corrods,,,,,,you need a new updated brass sensor and harness,you must do the harness,its a pigtail you wire in,,,,,do not buy autozone junk they misread you need the saturn sensor and connector,like $70 for parts,,,,,,,that will fix it,,,also do not run platinum spark plugs that will set the light as well

Posted on Apr 09, 2010

  • 11 Answers

SOURCE: check engine light is on and cooling fan runs

curious to know if you got this solved. Guessing downstream o2 sensor. did your vue idle high? act like it was getting too much gas? Let me know please.

Posted on Oct 29, 2010

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1 Answer

How to change a alternator on a 2005 Saturn Vue 3.5 litre


  1. ImportantRecord all pre-set radio stations.
  2. Turn the ignition OFF.
  • Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .


    1. Click to Enlarge
    2. Remove the air cleaner assembly. Refer to Air Cleaner Assembly Replacement .
  • Remove the accessory drive belt tensioner. Refer to Drive Belt Tensioner Replacement .
  • Install the engine support fixture. Refer to Engine Support Fixture .
  • Remove the front of the engine mount throughbolt and raise the engine for proper clearance.


    1. Click to Enlarge
    2. Disconnect the generator electrical connections.


    3. Click to Enlarge
    4. Remove the generator to engine block bolts and the generator.
  • Hope this helps.


    26352267-1nl1kvl0xxdpasyous2totlm-2-0.jpg

    Nov 12, 2016 | Saturn Cars & Trucks

    1 Answer

    Knock sensor for 2007 Saturn outlook. I can't pass emissions test!


    Check engine light on ? What code ? There are many different (DTC'S) - diagnostic trouble codes that can set for knock sensors ! There all don't mean that you replace the sensor .
    DTC P0324: Knock Sensor (KS) Module Performance
    DTC P0325: Knock Sensor (KS) Circuit Bank 1
    DTC P0326: Knock Sensor (KS) Performance
    DTC P0327: Knock Sensor (KS) Circuit Low Bank 1
    DTC P0328: Knock Sensor (KS) Circuit High Bank 1
    DTC P0330: Knock Sensor (KS) Circuit Bank 2
    DTC P0332: Knock Sensor (KS) Circuit Low Bank 2
    DTC P0333: Knock Sensor (KS) Circuit High Bank 2

    The knock sensor (KS) system enables the control module to control the ignition timing for the best possible performance while protecting the engine from potentially damaging levels of detonation. The sensors are located below each cylinder head on the engine block. The KS produces an AC voltage signal that varies depending on the vibration level during engine operation. The control module adjusts the spark timing based on the amplitude and the frequency of the KS signal. The control module receives the KS signal through 2 isolated signal circuits. The control module learns a minimum KS noise level at idle and uses calibrated values for the rest of the RPM range. The control module should monitor a normal KS signal within the noise channel.
    Knock Sensor Replacement - Bank 1
    Remove the exhaust manifold lower heat shield. Refer to Exhaust Manifold Lower Heat Shield Replacement.
    Disconnect the engine wiring harness electrical connector (1) from the bank 1 knock sensor (2).
    Loosen the knock sensor bolt and remove the knock sensor.
    Knock Sensor Replacement - Bank 2
    Disconnect the negative battery cable. Refer to Battery Negative Cable Disconnection and Connection .
    Remove the engine oil filter. Refer to Engine Oil and Oil Filter Replacement .
    Lower the vehicle.
    Disconnect the engine wiring harness electrical connector (2) from the bank 2 knock sensor (3).
    Loosen the knock sensor bolt and remove the knock sensor.

    Nov 12, 2016 | Saturn Cars & Trucks

    2 Answers

    Check engine lite is on but will not give me any codes. the lite just stays on


    Check engine lite
    Ron, there should be a code if engine light is on,you can have a code stored without a engine light, but not possible to have a engine light without a code.
    I am pretty sure, what ever code reader or scan tool you are using, is either faulty or not up to the job. Try a quality scanner, there will be a code.

    Apr 06, 2016 | Cars & Trucks

    1 Answer

    What does a o2 sensor look like


    Heated Oxygen Sensor

    Print


    Removal & Installation

    3.5L

    WARNING When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.

    1. Disconnect the negative battery cable.
    2. Disconnect the heated oxygen sensor electrical connector.
    3. Use a socket such as a crowfoot wrench to remove oxygen sensor.

    To Install:

    NOTE When replacing an O2 Sensor, the PCM RAM memory must be cleared, either by disconnecting the PCM C-1 connector or momentarily disconnecting the Battery negative terminal. The NGC learns the characteristics of each O2 heater element and these old values should be cleared when installing a new O2 sensor. The customer may experience driveability issues if this is not performed.
    1. After removing the sensor, the threads must be cleaned with an 18 mm X 1.5 + 6E tap. If reusing the original sensor, coat the sensor threads with an anti-seize compound such as Loctite 771- 64 or equivalent. New sensors have compound on the threads and do not require an additional coating. Tighten the sensor to 28 Nm (20 ft. lbs.) torque.
    2. Connect the heated oxygen sensor electrical connector.
    3. Install the wiring clip to the heat shield.
    4. Connect the negative battery cable.

      0996b43f80202384.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig.


    3.8L Downstream Sensor

    WARNING When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
    1. Disconnect negative battery cable.
    2. Raise and support vehicle.
    3. Disconnect the electrical connector.
    4. Use a socket such as a crowfoot wrench to remove oxygen sensor.

    3.8L Upstream & Downstream Sensors

    NOTE When replacing an O2 Sensor, the PCM RAM memory must be cleared, either by disconnecting the PCM C-1 connector or momentarily disconnecting the Battery negative terminal. The NGC learns the characteristics of each O2 heater element and these old values should be cleared when installing a new O2 sensor. The customer may experience driveability issues if this is not performed.
    1. After removing the sensor, the threads must be cleaned with an 18 mm X 1.5 + 6E tap. If reusing the original sensor, coat the sensor threads with an anti-seize compound such as Loctite 771- 64 or equivalent. New sensors have compound on the threads and do not require an additional coating. Tighten the sensor to 28 Nm (20 ft. lbs.) torque.
    2. Connect the heated oxygen sensor electrical connector.
    3. Connect the negative battery cable.

    3.8L Upstream Sensor

    WARNING When disconnecting the sensor electrical connector, do not pull directly on wire going into sensor.
    1. Disconnect negative battery cable.
    2. Disconnect the upper O2 sensor connector.
    3. Use a socket such as a crowfoot wrench to remove oxygen sensor.

      0996b43f80202385.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig.


      0996b43f80202386.jpg enlarge_icon.gifenlarge_tooltip.gif

      Fig.


    To Install:


    Testing


    NOTE Allow the O2 Sensor to cool down before conducting the test. The O2 Sensor voltage should stabilize at 5.0 volts. Raising the hood may help in reducing under hood temps quicker.

    1. Turn the ignition on, engine not running. With the scan tool, actuate the O2 Heater Test.
    2. With the scan tool, monitor O2 Sensor voltage for at least 2 minutes. Does the O2 Sensor voltage stay above 4.5 volts- If so, sensor is normal.
    3. If voltage does not stay above 4.5v as indicated, check wiring and connectors. Check O2 sensor for contamination.
    4. If wiring from the O2 sensor is damaged, DO NOT repair it; replace the O2 sensor.
    5. Turn the ignition off. Allow the O2 sensor to cool down to room temperature.
    6. Disconnect the O2 Sensor harness connector.
    7. Measure the resistance across the O2 Sensor Heater element component side. Resistance for either O2 Sensor should be 2.1-2.7 ohms.
    8. If the O2 Sensor is not within range, turn the ignition off.
    9. Disconnect the O2 Sensor harness connector. Turn the ignition to ON; engine not running.
    10. With the proper scan tool, actuate the O2 Heater Test.
    11. Using a 12-volt test light connected to ground, probe the O2 Heater Control circuit in the O2 Sensor harness connector.
    12. If the test light illuminates brightly and flashes on and off, replace the O2 Sensor.
    13. Confirm the repair with the appropriate Verification Test.
    14. Turn the ignition off.
    15. Disconnect the O2 Sensor harness connector.
    16. Disconnect the PCM harness connector.
    17. Measure the resistance between ground and the O2 Heater Control circuit in the O2 Sensor harness connector.
    18. Is the resistance below 5.0 ohms- If yes, repair the short to ground in the O2 Sensor Heater Control circuit. If resistance is okay, go to step 20.
    19. Confirm the repair.
    20. If resistance was okay when measured in step 17, check the PCM harness connector terminals for corrosion, damage, or terminal push out. Repair as necessary.
    21. If the resistance is still not within specified range, replace and program the Powertrain Control Module in accordance with the service information.
    22. Confirm the repair.

    Jul 13, 2012 | 2004 Chrysler Pacifica

    1 Answer

    How do u take off the starter


    3.2L Engines

    1. Before servicing the vehicle, refer to the Precautions section.
    2. Remove or disconnect the following: Negative battery cableHeated Oxygen (HO2S) sensor connectorsExhaust front pipeHeat shieldStarter wiring connectorsStarter motor
    Negative battery cable
    Heated Oxygen (HO2S) sensor connectors
    Exhaust front pipe
    Heat shield
    Starter wiring connectors
    Starter motor

    To install:

    1. Install or connect the following: Starter motor. Tighten the bolts to 30 ft. lbs. (40 Nm).Starter wiring connectorsHeat shieldExhaust front pipeHeated Oxygen (HO2S) sensor connectorsNegative battery cable
    Starter motor. Tighten the bolts to 30 ft. lbs. (40 Nm).
    Starter wiring connectors
    Heat shield
    Exhaust front pipe
    Heated Oxygen (HO2S) sensor connectors
    Negative battery cable

    Hope helps (remember to rate this).

    Nov 08, 2010 | 1999 Isuzu Rodeo

    1 Answer

    Where are the four O2 sensors on a 2003 Montero Sport? Is $300 reasonable to replace the two upstream sensors?


    According to the service literature I read, the 2003 Montero Sport with the 3.0 or 3.5 L engine does not have O2 sensors listed even in the maintenance schedule. The 2.4 L engine has it on the exhaust manifold though.
    ---
    However, the following lists the par, though for before or after the catalytic converter:

    http://www.partstrain.com/store/index.php?VN=4294967180+4294966587+4294964143+&Nr=AND(universal:0)&N=0&Ntt=Oxygen%20Sensor

    ---
    I think that $250 to $300 is reasonable if the Oxygen sensors are stuck in there with rust and the threads are preserved by the technician. Oxygen Sensor replacement can be tricky.
    ---
    Good luck on this repair.

    Exhaust Manifold

    REMOVAL & INSTALLATION

    2.4L Engine


    1. Remove or disconnect the following:

      • Negative battery cable

      CAUTION
      Wait at least 90 seconds after the negative
      battery cable is disconnected to prevent possible deployment of the air bag.


    2. Heat cowl from the exhaust manifold
    3. Aspirator valve assembly, if equipped
    4. Oil dipstick and guide
    5. Oxygen (O2S) sensor connector and ground cable, if equipped
    6. Exhaust pipe from the manifold
    7. Exhaust manifold and gasket from the engine
      To install:

    8. Install or connect the following:

      • Exhaust manifold. Torque the M8 mounting nuts to 22 ft. lbs. (29 Nm) and the
        M10 mounting bolts 36 ft. lbs. (49 Nm). starting from the middle and working
        outward.
      • O2S sensor connector and ground cable, if equipped
      • Exhaust pipe to the manifold. Torque the nuts to 35ft. (49 Nm).
      • Aspirator valve assembly, if removed
      • Heat cowl to the exhaust manifold. Torque the bolts to 117 inch lbs. (13
        Nm).
      • Negative battery cable

    9. Start the engine and check for exhaust leaks.


    3.0L and 3.5L Engines


    1. Remove or disconnect the following:

      • Negative battery cable
      • Exhaust pipe from the exhaust manifolds
      • Oil dipstick, guide and O-ring
      • Heat shields
      • Exhaust manifolds

    2. Clean the gasket mounting surfaces. Inspect the manifolds for cracks,
      flatness and/or damage.
      To install:

    3. Install or connect the following:

      • New gasket and exhaust manifold. Torque the nuts to 33 ft. lbs. (44 Nm) on
        3.0L engines and 22 ft. lbs. (29 Nm) on 3.5L engines.
      • Heat shield, Torque the bolts to 10 ft. lbs. (14 Nm).
      • Exhaust pipe to the exhaust manifolds. Torque the nuts to 35ft. (49 Nm).
      • Oil dipstick, guide and new O-ring
      • Negative battery cable

    4. Start the engine and check for exhaust leaks.


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    Oct 07, 2010 | 2003 Mitsubishi Montero Sport

    1 Answer

    O2 sensor bank1 sensor 1 where is it located on 2004 Dodge Caravan


    prev.gif next.gif Oxygen Sensor I think that bank1 sensor1 stands for the upstream o2 sensor vs. the sensor2 which is the downstream o2 sensor. Both the 4 cyl. and 6 cyl. employ 2 o2 sensors.

    If you get it wrong, changing both might be a good idea.
    Removal & Installation 2.4L Engine NOTE: These engines use 2 heated oxygen sensors.
    Upstream HO2S1 To Remove:
    NOTE: If the engine temperature is lower than 120 °F (48 °C), the HO2S1 sensor may be difficult to remove. Excessive force could possibly damage the threads in the exhaust manifold.
    1. Disconnect the negative battery cable.
    2. Raise and safely support the vehicle.
    3. Disconnect the electrical connector from the sensor.
    4. Using an oxygen sensor removal tool carefully remove the heated oxygen sensor.
    To Install:
    1. Clean the threads in the exhaust manifold with an 18 mm X 1.5 + 6E tap.
    2. If reusing the original sensor, coat the sensor threads with an anti-seize compound. New sensors come treated with anti-seize compound on the threads and do not require an additional coating.
    3. Install and tighten the sensor 20 ft. lbs. (27 Nm).
    4. Connect the electrical connector and install the wiring on the bracket.
    5. Lower the vehicle.
    6. Connect the negative battery cable.
    Downstream HO2S2 To Remove:
    NOTE: If the engine temperature is lower than 120 °F (48 °C), the HO2S 2 sensor may be difficult to remove. Excessive force could possibly damage the threads in the exhaust pipe.
    1. Disconnect the negative battery cable.
    2. Raise and safely support the vehicle.
    3. Disconnect the electrical connector from the oxygen sensor.
    4. Use an oxygen sensor socket to remove the sensor from the catalytic converter.
    To Install:
    1. If reusing the original sensor, coat the sensor threads with an anti-seize compound. New sensors come treated with anti-seize compound on the threads and do not require an additional coating.
    2. Install and tighten the sensor 20 ft. lbs. (27 Nm).
    3. Connect the electrical connector to the sensor.
    4. Lower the vehicle.
    5. Connect the negative battery cable.
    3.3L & 3.8L Engines NOTE: These engines use 2 heated oxygen sensors.
    Upstream HO2S1 To Remove:
    NOTE: If the engine temperature is lower than 120 °F (48 °C), the HO2S1 sensor may be difficult to remove. Excessive force could possibly damage the threads in the exhaust manifold.
    1. Remove the battery and battery tray.
    2. Disconnect the speed control vacuum harness from servo.
    3. Remove the cruise control servo and bracket. Place it out of the way.
    4. Disconnect the electrical connector from the oxygen sensor.
    5. Use an oxygen sensor socket to remove the sensor.
    To Install:
    1. Clean the threads in the exhaust manifold with an 18 mm X 1.5 + 6E tap.
    2. If reusing the original sensor, coat the sensor threads with an anti-seize compound. New sensors come treated with anti-seize compound on the threads and do not require an additional coating.
    3. Install and tighten the sensor 20 ft. lbs. (27 Nm).
    4. Connect the electrical connector to the sensor and install the sensor on the bracket.
    5. Install the cruise control servo.
    6. Install the battery tray and battery.
    Downstream HO2S2 To Remove:
    NOTE: If the engine temperature is lower than 120 °F (48 °C), the HO2S 2 sensor may be difficult to remove. Excessive force could possibly damage the threads in the exhaust pipe.
    1. Disconnect the negative battery cable.
    2. Raise and safely support the vehicle.
    3. Disconnect the electrical connector from the oxygen sensor.
    4. Use an oxygen sensor socket to remove the sensor from the catalytic converter.
    To Install:
    1. If reusing the original sensor, coat the sensor threads with an anti-seize compound. New sensors come treated with anti-seize compound on the threads and do not require an additional coating.
    2. Install and tighten the sensor 20 ft. lbs. (27 Nm).
    3. Connect the electrical connector to the sensor.
    4. Lower the vehicle.
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    Jul 31, 2010 | 2004 Dodge Caravan

    1 Answer

    How to change the radiator fan?


    Electric Engine Fan - Fan Switch

    Removal & Installation
    2.7L Engine
    1. Disconnect negative battery cable.
    2. Partially drain cooling system.
    3. Disconnect the electrical connector .
    4. Remove engine coolant sensor from coolant outlet tube .
    To install:
    1. Apply thread sealant to sensor threads.
    2. Install engine coolant temperature sensor into coolant outlet tube.
    3. Tighten sensor to 20 ft. lbs.(28 Nm) torque.
    4. Connect electrical connector to engine coolant temperature sensor .

    3.2L And 3.5L Engines
    1. Disconnect negative battery cable.
    2. Partially drain cooling system.
    3. With the engine cold, disconnect coolant sensor electrical connector.
    4. Remove sensor.
    To install:
    1. Install engine coolant temperature sensor.
    2. Tighten sensor to 20 ft. lbs.(28 Nm) torque.
    3. Attach electrical connector to sensor.
    4. Connect negative battery cable.
    Removal & Installation
    1. Disconnect negative battery cable.
    2. Partially drain cooling system.
    3. Remove upper radiator hose.
    4. Disconnect cooling fan electrical connector.
    5. Remove cooling fan mounting bolts.
    6. Remove radiator cooling fan assembly from vehicle.

      f9d971c.jpg
      Fig. Removal and installation of the radiator fan-2.7L Engine shown
    To install:
    1. Position radiator cooling fan assembly in vehicle.
    2. Install cooling fan mounting bolts. Tighten to 50 inch lbs. (6 Nm)
    3. Connect cooling fan electrical connector.
    4. Install upper radiator hose .
    5. Fill cooling system.
    6. Operate engine until it reaches normal operating temperature.
    7. Check cooling system and automatic transmission for correct fluid levels.

    Hope helps (remember comment and rated this).

    Jul 13, 2010 | 2001 Dodge Intrepid

    1 Answer

    Service engine soon light


    Heat sensor or heated O2 sensor? These are 2 different things. After replacing the sensor the first time, did you remove the negative battery cable for at least 30 seconds? This will re-set the ECM.

    May 30, 2008 | 1999 Chevrolet Tahoe

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