Technical Oil light after an oil change

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Technical Oil light after an oil change

Hi Guys! I really need your help! Yesterday I have changed the oil and oil filter in my Panda which has a 1.2 v8 FIRE engine. I changed other bits on the car as well at the same time, like spark plugs, valve cover gasket, thermostat, v-belt.

However, after starting up the car the red oil light didn't go away

Do you guys have some idea where should I look?

Retrace your steps..

What parts..and wiring.. did you disturb ?

The oil light could be a random error :eek:
 
Retrace your steps..

What parts..and wiring.. did you disturb ?

The oil light could be a random error :eek:

For the first time I disconnected and moved around some wires which runs top of the timing belt cover, in order to remove the valve cover and change the gasket. Before that there wasn’t an issue like this, so something happened that time, I just can’t image what, as I’m always careful and changed similar things on several cars before and never had an issue.

Today I disturbed all cables, and no additional problems. Maybe the connector itself to the oil pressure sensor broke?? I was thinking about to go to the junkyard and chop off one and connect it to my wiring harness as the wiring doesn’t seem to be broken all the way to the ecu plug.
 
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are you sure


I thought it was White ?

they can be tricky to follow

was there a connector part way ?

Yes it’s a bright green wire for sure, the connector under the fuse box was fine.
 
Yes it’s a bright green wire for sure, the connector under the fuse box was fine.

what year is the car. Was the thermostat an early simple type or the latter type with the temperature sensor built in


did you find a black connector part way along the wire ?
 
what colour is the wire at the sensor end

I didn't really want to go to ECU connector yet

but for your information its pin 7 of connector B

I wouldn't probe from the inside the connector. They are very easy to damage
 
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Model year is 2005 and the thermostat is an older one which is built into the housing, no electrical connections to it. The wire is a light brown one which comes from the oil pressure sensor.

It only set apart once at under the fuse box.
 
Model year is 2005 and the thermostat is an older one which is built into the housing, no electrical connections to it. The wire is a light brown one which comes from the oil pressure sensor.

It only set apart once at under the fuse box.

thank you


let me see if I can find the correct wiring diagram
 
is this he connector under the fuse box ?
 

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good


one side should have the same colour wire as going to the sensor


should be here


with the oil switch disconnected there should be low ohms between either end

and not register anything between either end and the engine block
 

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good


one side should have the same colour wire as going to the sensor


should be here


with the oil switch disconnected there should be low ohms between either end

and not register anything between either end and the engine block

I believe I have checked it and it was 00.1 ohm, however I haven’t checked to the block. I will do it tomorrow.
 
I believe I have checked it and it was 00.1 ohm, however I haven’t checked to the block. I will do it tomorrow.

its important to disconnect both ends when you test it. The oil switch is shorted to earth any wire with a path to earth will also measure low ohms

end to end low ohms

open circuit / no ohms between either end and the engine block
 
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here the bit we are looking at

k028 is the oil pressure switch


D004 is the connector under the fuse box


and the very bottom is the engine computer
 

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its important to disconnect both ends when you test it. The oil switch is shorted to earth any wire with a path to earth will also measure low ohms

end to end low ohms

open circuit / no ohms between either end and the engine block

Okay I checked it and it is exactly how you described. Between the open end cables there is 00.1 ohm, checking it to ground there is no resistance, shows OL, from both ends.
 
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