Oil pressure light comes on when brakes applied



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Thread: Oil pressure light comes on when brakes applied

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    Oil pressure light comes on when brakes applied

    Hi, my wife has a 2000 Chrysler T&C, around 153k mi.
    Today the oil light started to blink and ding occassionally when she pressed the brakes. Oil level is at max.

    From a forum I just read, it looks like my problem might be a bad oil pressure sensor. Does that seem likely and can someone walk me through the steps to replace? BTW, is the oil pressure sensor the same part as the sending unit?

    Thanks,
    BenB

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    Generally, when the oil pressure light comes on, next to checking the oil level, changing the sensor is the next step since they are cheap anyway and usually fix it. If you have the 3.3 or 3.8 ltr engine it's located to the left of the oil filter. Verify the connection is in good shape then use a wrench to remove. May have to remove the oil filter first. If you're still having problems after changing it connect a direct pressure gauge to verify what pressure in there.

    Sensor/sender same same. If you haven't changed the oil lately you might consider it. Low idle rpm good be the culprit. How's that look?
    ******** We took the time to answer your post. Please give us some time and post the fix. You'll help hundreds. ********

    **** Follow all prescribed safety procedures before attempting any repairs. If in doubt, refer to a maintenance manual. ****

    96 Gr Caravan LE 3.8, 206K miles
    07 Fusion / 06 RAV 4 / 06 Accord / 94 Camry

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    thanks for the quick answer! rpms normal on a short test drive I took. As luck would have it, we have a trip to the in-laws tomorrow, 3 hrs each way, so the van will stay parked and I won't have time to replace the sensor until Sun. I'll let you know if I need more help or report back with results.

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    Bumping up this thread, because we're having the same problem. Our 2000 T&C with 179,680 miles and 3.8 did the low oil pressure light/chime thing twice tonight. It has never done it before. I immediately checked the oil, and it was almost at the "full" mark/top of the crosshatched area, and it doesn't use any, so that's good. Running 10W-30 Havoline with a Purolator PureOne filter. It was about 35*F outside and raining, and it was idling both times around 700 - 800 RPM (normal). Later, after the temp dropped 10 degrees and the rain turned to ice, not a single problem. This was the warmest weather we have driven the van in since I finished fixing it, so I think that's why it only happened those 2 times. I'm guessing it's only going to get worse in the spring.

    So, looks like the first thing to do is replace the OP sensor. I'll give it an oil change at the same time (10W-30 synthetic blend). I just replaced the front timing cover gaskets, O-rings, shaft seal and water pump a couple months ago, and really can't pull the engine apart again right now. The inside of the engine had thin black sludge baked on, so the previous owner probably didn't keep up with oil changes or used bad oil. Maybe that's a contributing factor? If I have to open up the engine again, I'm replacing the oil pump and timing chain/sprocket set; I just hadn't planned on needing to do that until the van had 230-250,000 miles on it.

    If a new OP sensor doesn't fix the problem, can I baby this thing along with heavier oil in the summer, and bumping up the idle speed a little in the winter? I'm wondering if idle speed can be raised by slightly opening the throttle plate with the set screw? Just throwing out ideas here. Since the original poster didn't answer his own thread with an answer, I'll try to remember to update this.
    DAN(husband of member STEPHANIE)

    2000 Chrysler Town & Country Limited - Dark Charcoal Metallic with chrome trim, taupe leather interior, loaded. In need of rust repair on rockers and liftgate. Now enjoying the new family mommy-mobile!

    Knowledge can never be wisdom without experience.
    "Your experience is a commodity."
    "Opportunity is not a lengthy visitor."
    DRIVE = LOVE

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    Quote Originally Posted by Road Ripper View Post
    If a new OP sensor doesn't fix the problem, can I baby this thing along with heavier oil in the summer, and bumping up the idle speed a little in the winter? I'm wondering if idle speed can be raised by slightly opening the throttle plate with the set screw?
    You can, but your transmission will hate you...
    Jeff
    http://www.facebook.com/eddie.munster
    Current:
    2007 Grand Caravan/3.8L V6/103K mi/original 41TE
    2006 300C/5.7L HEMI V8/128/K mi/original W5A580
    2002 PT Cruiser/2.4L I4/139K mi/original 40TE
    1992 S-10/4.3L V6/249K mi/original 4L60E
    Previous minivans:
    1997 Grand Voyager SE/traded@192K mi/3.3L V6/original 41TE
    2003 Grand Caravan Sport/3.8L V6/traded@124K mi/original 41TE
    2007 T&C/3.8L V6/traded@44K mi/ original 41TE
    2010 T&C Touring/3.8L V6/the ex's@72K mi/original 62TE

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    There is no screw.

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    Quote Originally Posted by alvin View Post
    There is no screw.
    He meant adding a screw somehow, or at least that is how I took his post.
    Jeff
    http://www.facebook.com/eddie.munster
    Current:
    2007 Grand Caravan/3.8L V6/103K mi/original 41TE
    2006 300C/5.7L HEMI V8/128/K mi/original W5A580
    2002 PT Cruiser/2.4L I4/139K mi/original 40TE
    1992 S-10/4.3L V6/249K mi/original 4L60E
    Previous minivans:
    1997 Grand Voyager SE/traded@192K mi/3.3L V6/original 41TE
    2003 Grand Caravan Sport/3.8L V6/traded@124K mi/original 41TE
    2007 T&C/3.8L V6/traded@44K mi/ original 41TE
    2010 T&C Touring/3.8L V6/the ex's@72K mi/original 62TE

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    Quote Originally Posted by alvin View Post
    There is no screw.
    Not even under the aluminum pressed in plug? I've popped those plugs out of other engines to change the idle speeds.

    As for the trans, increasing the idle speed 50-100rpms at hot idle will be no big deal. 700rpms at hot idle is not much more than the 6-650.
    Candy the van. '98 Sport 3.8L 132,200 miles. Used trans at ~96k. Great piece of my life and a fine van.

    '69 GTO drop top
    www.facebook.com/people/Andy-Greif/1410438927

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    Quote Originally Posted by andyg View Post
    Not even under the aluminum pressed in plug? I've popped those plugs out of other engines to change the idle speeds.

    As for the trans, increasing the idle speed 50-100rpms at hot idle will be no big deal. 700rpms at hot idle is not much more than the 6-650.
    Right, 100 RPM is not a big deal. However going from 700 RPM to 1500 RPM is a big deal. And no set screw for idle that I am aware of. Idle on the engines is controlled by the PCM.
    Jeff
    http://www.facebook.com/eddie.munster
    Current:
    2007 Grand Caravan/3.8L V6/103K mi/original 41TE
    2006 300C/5.7L HEMI V8/128/K mi/original W5A580
    2002 PT Cruiser/2.4L I4/139K mi/original 40TE
    1992 S-10/4.3L V6/249K mi/original 4L60E
    Previous minivans:
    1997 Grand Voyager SE/traded@192K mi/3.3L V6/original 41TE
    2003 Grand Caravan Sport/3.8L V6/traded@124K mi/original 41TE
    2007 T&C/3.8L V6/traded@44K mi/ original 41TE
    2010 T&C Touring/3.8L V6/the ex's@72K mi/original 62TE

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    Bought a new OEM oil pressure switch today at a dealer, for $19.93 - - so much for it being around 10 dollars like others have posted! Did they really raise the price that much, or do you think the particular dealer marked the price up that high for profit? If it fixes the problem though, it's totally worth the $20 to me so that I don't have to open the engine up again. Now I just have to track down a new oil filter and wait for the weather to warm up enough to change the oil.

    Yeah, and I would only set the idle speed up by 100 RPM. It should have a set screw for the throttle plate closing stop, to prevent it from slamming shut and sticking. Probably won't need to do that, hopefully.
    DAN(husband of member STEPHANIE)

    2000 Chrysler Town & Country Limited - Dark Charcoal Metallic with chrome trim, taupe leather interior, loaded. In need of rust repair on rockers and liftgate. Now enjoying the new family mommy-mobile!

    Knowledge can never be wisdom without experience.
    "Your experience is a commodity."
    "Opportunity is not a lengthy visitor."
    DRIVE = LOVE

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