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Oil leak from the oil pressure sensor or the engine temp sensor

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Remove said item and refit using plumbers mate on threads to seal leak.works for me.im a cheapskate.......

Posted on Apr 26, 2010

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Posted on Jan 02, 2017

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Would a bad oil pressure switch cause a no start on a 98 b2500


Hi,
Symptoms of a bad or failing Engine Oil Pressure Sensor
  • Oil Pressure Light comes on, and you check the engine oil level, But oil level is okay, you can blame the false reading on the sensor.
  • Oil Pressure Light blinking constantly. This is the normal >check< oil pressure sensor Warning that the sensor is going out.
  • If the sensor is giving false readings, Dispite oil level, the sensor could be replaced.
If the Sensor is currently not working, and does not warn you of engine oil level, and oil level gets extremely low, The Engine could burn up/stall due to lack of oil, and may not restart.
Then you could probably blame it on the sensor.
But really would be lack of oil.

Intermittent No Start,
Common causes deal with 3 basic systems/areas of engin
  1. Compression, its the build up of air and fuel into the engines cylinders. Then is compressed by the pistons. And is under pressure. FAILURE An Air leak (vacumm leak) will allow pressure to escape.
  2. Ignition System, good battery, good relays, wires are not loose or disconnected, good 10volts to starter, 10volts to distributer>gives 20kvolts to spark plugs>has strong spark to ignite compressed air in cylinders. Other sensors need to work. Crankshaft sensor(ccs) Throttle Position Sensor(TPS), +more
  3. Air/fuel Ratio, Air Intake Manifold, and Fuel Pressure Sensor *Fuel Injection Pressure Sensor---if car is fuel injected*, air filter is clean and intake manifold hose, Throttle Plate Acuater, Idle Air Contro Valve(IAC). Also vacumm leak cause no start. To much air not enough fuel will cause lean fuel mixter==low power, low idle, no start.......To much fuel not enough air will cause rich fuel mixter==too much fuel could cause engine knock, flooding of engine wet spark plugs, No Start
Scan Vehicle computer for Codes, Places like AutoZone---Discount AutoParts will connect scanner for free, And Code Will say What is wrong with Vehicle,

Mar 08, 2017 | Cars & Trucks

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Mack Fault Codes List


FAULT CODE IDENTIFICATION TABLE - VMACIII - 1998 & NEWER
1-1 Engine Oil Pressure Sensor
1-2 Barometric Pressure Sensor
1-3 Fuel Temperature Sensor
1-4 Ambient Air Temp Sensor
1-6 Starter Input
1-7 Engine Coolant Level
1-8 (ASET CEGR) Estimated % Fan Speed
1-10 Aux. Cooling Relay Output
2-1 Engine Coolant Temp Sensor
2-2 (ASET IEGR) Boost Air Pressure Sensor
2-2 (ASET CEGR) Boost Air Pressure
2-3 Intake Air Temp Sensor
2-4 Trans Oil Temp Sensor
2-5 Front Drive Axle Oil Temp Sensor
2-6 Rear Drive Axle Oil Temp Sensor
2-7 Engine Oil Temp Sensor
2-8 (ASET CEGR) Combustion Air Temperature
2-9 (ASET CEGR) Combustion Air Temp Sensor
3-1 Exhaust Temperature Sensor
3-2 Engine Speed Sensor
3-3 Redundant Engine Speed
3-4 Engine Position Sensor
3-5 Engine Brake Output #1
3-6 Engine Brake Output #2
3-8 Trans Splitter Position
3-10 (ASET CEGR) Engine Brake Output #3
4-1 Vehicle Speed Sensor (VSS)
4-2 Fan Clutch Output
4-3 Auxiliary Output #1
4-4 Auxiliary Output #2
4-5 (ASET IEGR) Wastegate Output
4-5 (ASET CEGR) VTG Position Sensor
4-6 Tachometer Output
4-7 Speedometer Output
4-8 Customer Defined Statement
4-9 (ASET CEGR) EGR Valve Mechanism
5-1 Throttle Position Sensor
5-2 Throttle Position Sensor Reference Voltage
5-3 Engine Shutdown Lamp/Alarm
5-5 Electronic Malfunction Lamp
5-6 Spare Relay #3
5-7 Engine Oil Level
5-8 (ASET CEGR) EGR Temperature
5-9 (ASET CEGR) EGR Mass Flow
6-1 Fuel Level
6-2 (ASET CEGR) Turbocharger Speed
6-3 J1708/J1587 Link
6-4 J1939 Link
6-5 All Communication Lost - Engine Shutdown
6-6 Fuel Control Module
6-7 Power Relay
6-8 J1939 Link
6-9 Other ECU Affecting Operation
7-1 Service Brake Switch
7-2 Parking Brake Switch
7-3 Speed Control SET Switch
7-4 Speed Control RESUME Switch
7-5 Battery / Alternator Voltage
7-6 Switched Voltage
7-7 Exhaust Temp Reference
7-9 VTG Actuator
8-1 Electronic Unit Pump #1
8-2 Electronic Unit Pump #2
8-3 Electronic Unit Pump #3
8-4 Electronic Unit Pump #4
8-5 Electronic Unit Pump #5
8-6 Electronic Unit Pump #6
8-9 Solenoid Boost Voltage
9-1 Transport Protocol
9-2 Power Reset Without Key Switch
9-3 (ASET CEGR) Aftercooler Outlet Temperature
9-5 (ASET CEGR) Compressor Discharge Temp
9-8 (ASET CEGR) Auxiliary Output Device #1
9-9 (ASET CEGR) Auxiliary Output Device #2
9-10 (ASET CEGR) Auxiliary Output Device #3
10-1 (ASET CEGR) Internal Sensor Voltage
10-2 (ASET CEGR) 5 Bolt Supply
10-3 (ASET CEGR) Sensor Supply Voltage #1
10-4 (ASET CEGR) Sensor Supply Voltage #2
10-5 (ASET CEGR) Fuel Filter Differential Pressure
10-6 (ASET CEGR) Fuel Delivery Pressure
10-7 (ASET CEGR) Odometer Save Area Failure
10-8 (ASET CEGR) GPS Position Data Not Received
10-9 (ASET CEGR) Watchdog Timer Reset


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on Dec 20, 2016 | Cars & Trucks

1 Answer

What will cause low oil pressure gauge to enter red zone after temp is above 190*?


Odds are the engine and/or oil pump is wearing out.
A weak pump can cause low oil pressure, as can worn engine bearings.
The oil is pumped thru the crank bearings, then up to the top of the cyl heads. The pressure switch is midway up the block.
10w30 oil is made to be used between 0 degrees and 100 degrees. As the temp goes up the oil is supposed to get thicker, but only so much. So as the engine warms up the oil gets thinner and naturally looses some pressure. Thinner oil will "leak" thru worn engine parts.
You may luck out and have the pump replaced and fix the problem, but if it has more than 125,000 miles on the engine, the bearings are probably failing too.

May 25, 2016 | 1995 Pontiac Bonneville

1 Answer

Oil pressure light stays on .engine is running good .why is the light on?


Check the oil pressure sensor and the wiring to it.

Oil Pressure Sensor Removal & Installation 3.4L & 3.5L Engine To Remove:
  1. Disconnect the battery ground cable.
  2. Raise and safely support the vehicle.
  3. Disconnect the electrical connector from the oil pressure sensor. chev_vent_op-sen.gif

  4. Remove the oil pressure sensor from the engine.
To Install:
  1. Install the oil pressure sensor on the engine. Tighten 12 ft-lb (16 Nm).
  2. Connect the oil pressure sensor electrical connector.
  3. Lower the vehicle.
  4. Connect the battery ground cable.
  5. Start the engine and check for leaks.
3.6L Engine To Remove:
  1. Disconnect the oil pressure sensor electrical connector. Oil pressure sensor 3.6L gm-04-36-2519.gif

  2. Remove the oil pressure sensor.
To Install:
  1. Install the oil pressure sensor. Tighten 15 ft-lb (20 Nm).
  2. Connect the oil pressure sensor electrical connector.
  3. Check for leaks.
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Aug 07, 2010 | 2003 Buick Rendezvous

1 Answer

I did a oil change on my 1994 gmc suburban w/5.7L and it started leaking oil on the back of the motor by the intake and the brass fitting for the oil pressure sensor. It is a steady leak and will lose all...


OK, does it appear that the oil pressure sensor is leaking through the plastic to metal seam (on the sensor itself)?

Have had an oil pressure sending unit go bad and leak on a 1990 Oldsmobile Cutlass Calais that needed to be replaced.

REMOVAL & INSTALLATION C1500 Suburban 1994
  1. Disconnect the negative battery cable and drain the engine oil.
  2. Disconnect the sensor electrical lead and unscrew the sensor. The sensor can be found on the top side of the engine, near the distributor. To install:
  3. Coat the first two or three threads with sealer. Install the sensor and tighten until snug. Engage the electrical lead.
  4. Connect the battery cable and fill the engine with oil.

Jul 14, 2010 | 1994 GMC Sierra

3 Answers

2002 malibu runs hot.


Sounds like you have a faulty head gasket or maybe a cracked head.This can cause overheating and the check engine light to come on.The code for the o2 sensor is probably caused by coolant getting into the exhaust system and coating the sensor.The coolant fan may work but it cannot remove enough heat from the rad to make the engine cool off.Try some engine coolant stop leak to see if it will help.This maybe only a temperary fix.Let me know if you need more.MOE

Jun 22, 2010 | 2002 Chevrolet Malibu

2 Answers

Where is the oil pressure sensor of vw golf 1999


The sensors are usually found on the oil filter flange housing with the oil cooler. Also there are two dynamic sensors to measure pressure below 2000 rpm and above 2000 rpm so it could warn you of pressure loss within those two ranges.

May 22, 2010 | 1999 Volkswagen Golf

2 Answers

Oil pressure drops after worm up


let vehicle reach normal operating temp. remove oil pressure sensor replace with manual oil press. gauge run engine and monitor oil pressure go from there dependent upon findings

Mar 17, 2010 | 2000 Jeep Grand Cherokee

5 Answers

Engine start normally and when it reach the maximum heat of the engine temperature it starts surging and engine cuts out when u try it to start again it won't start.what are the possible cause of the...


Dear sir I have Bighorn 3.0 4JX1 car. Suddenly it start cuting of engine while running, like no fuel, but it start again. But sometimes it doesn´t. and before cutting it make noise us the fuel supply is cuting in the pump. Here we don´t have computer scan. Can someone indicates where to check? which sensor? Thanks

Jan 20, 2010 | 1999 Isuzu Trooper

2 Answers

Oil Pressure Problems, leaks


I believe what you're looking for may be called an oil pressure switch or oil pressure sensor instead of an oil sensor. If this is correct it should be easy to locate at almost any local auto parts supplier or online at places such a www.rockauto.com. Rock Auto has an easily searched catalog and the prices seem reasonable. Also there are pictures of the part.

If what was removed is an oil pressure unit and the engine is started oil will definitely be pumped out of the engine. I hope this is of some assistance.

Nov 27, 2008 | 1994 Pontiac Bonneville

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