Question about 2002 Chevrolet TrailBlazer

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2002 chevy trailblazer. 1.oil pressure gauge drops to zero at idle spuraticly 2 where is the sensor that controls the dash guage note: when i unplug the sensor @ the oil filter and the one on the passenger side right under the valve cover,the guage still works

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The sensor is on the side of the engine block. there's two thing that monitors oil. a pressure switch turns you oil light on and you oil pressure sensor the operates your gauge, start with your sensor. that is near you oil filter that is where it gets it pressure reading from

Posted on Jul 24, 2009

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At idle the oil pressure gauge will go to zero, stop engine warning light comes on. I replaced sending switch and still have the same problem. How can I connecet a real oil pressure gauge on a 2002...


Hook the pressure guage into the same hole the sending unit is in. If you want to make it permanent put a brass "T" fitting in the hole and hook both to that. Hope this helps.

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I have been having intermittent problems with my '04 Trailblazer oil pressure gauge. Recently, when I am stopped at a light, or sitting idle, the oil pressure gauge drops to zero. Then, when I get...


It sounds like the oil pressure switch has failed. It is only an on/off switch that trips at about 15 - 17 PSI, the reading displayed on the dash is created by the computer based on the pressure switch being closed and the engine RPM.

Aug 02, 2011 | 2004 Chevrolet TrailBlazer

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Check guages light keeps coming on when i am in park or have my foot on the breaks it is a 2002 chevy trailblazer.


I would check my oil pressure gauge and the oil level as well. the fuel level guage also malfunctions on those models so make sure it is working properly and not floating from full to empty that will cause the light to come on as well as overheating of the engine(low coolant levels)low oil level,low fuel level,and low charging volts from your alternator.if all is well suspect a short in dash.

Jan 21, 2011 | 2002 Chevrolet TrailBlazer

1 Answer

Oil pressure gauge drops to zero at idle. Do I have a switch or senzor and where is it?


If your oil pressure is dropping to zero at an idle, then I would quit driving the vehicle. It is very possible that the engine is low on oil. Or that the oil pump is going bad. If you continue to drive the vehicle, you could ruin the engine. There is a oil pressure sending unit that could be bad. But if the oil pressure goes up when it is above an idle, then the sending unit is probably ok.

Jan 10, 2011 | 2002 Chevrolet TrailBlazer

2 Answers

The oil pressure gauge drops to zero when i slow down


Have a mechanical gauge hooked up to see that the oil pressure is good or not. If you have no or low at an idle, it can be due to bad oil pump, or worn out bearings.

Dec 16, 2010 | 1995 Jeep Grand Cherokee

1 Answer

2002 trail blazer runs good unil its stopped @ idle (600 rpm) the oil gauge pressure drops off fast and check gauges light comes on followed by low oil pressure read out . If i give a little throtle to 800...


Thank you for being very clear, most of the people on this site write very little or very poorly.

On that note, on to options. It's either (in my expert opinion) an internal engine problem, or your computer/spark plugs needs to be replaced.

Step 1: Get a tune up, (100 bucks) if already done, than I'm proud of you.
Step 2: Go to a mechanic and shell out 50-80 bucks to get a specialized computer hooked up to your car to tell you any and all of the problems with your car.
Step 3: get overcharged by said mechanic to fix it, or do it yourself and grow some chest hair.

Hope it helps.

(excuse the sarcasm, I'm bored at work solving random car problems)

Dec 12, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Dropping oil pressure


You need to put a mechanical gauge on it to read actual oil pressure, sometimes the sensor is wrong, have seen the gauge be off (even on newer than yours). The first thing anyone would do is the mechanical pressure test with a screw in oil pressure gauge. That would be my advise.

Aug 03, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

THE OIL PRESSURE GAUGE DROPS TO ZERO AND LIGHTS ON THE DASH FLASH WHEN STOPPING ON MY 2002 CHEVY TRAILBLAZER


poor oil circulation may need either more oil or a new oil pump, any other symptoms?

It could just be the pressure sensor, as this is cheaper get it looked at first.

Hope this helps
Regards
Dan

Feb 01, 2010 | 2002 Chevrolet TrailBlazer

1 Answer

Oil pressure guage dropping


Sounds like the sensor is failing.Have oil pressure checked with a mechanical gage to confirm. A new sensor or wiring repair is allot cheaper then a new engine!!

Feb 01, 2009 | 2004 Chevrolet TrailBlazer

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