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disable the oil pressure sensor

 
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Old 06 May 2017, 02:01 pm
_PTGT03's Avatar
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Default disable the oil pressure sensor

I've opted to install an aftermarket oil pressure sender for my aftermarket gauge which is 0-80 psi.

I was intending to install both oil pressure sensors with some adapters, pipe nipples and elbows but I ended up by not having enough space to work. Plus the oil pressure sensor light harness broke off. Reading up on the description of operation from the service manual; I determined simply leaving the harness unplugged or clipping of the wire and taping it will disable the oil pressure light from coming on.

Note: the existing NPT thread size is 3/4. I had to use an adapter bushing to bring the size down to 1/8 NPT for my aftermarket sender.


LOW OIL PRESSURE INDICATOR
The low oil pressure indicator will illuminate when the ignition switch is turned to the ON position without the engine running. The lamp also illuminates if the engine oil pressure drops below a predetermined safe oil pressure level.

Turn the ignition switch to the ON position. If the lamp fails to light, inspect for a broken or disconnected wire at the oil pressure switch, located on the rear of the engine. If the wire at the connector checks good, pull the connector loose from the switch and with a jumper wire, ground the connector to the engine. With the ignition switch turned to the ON position, check the warning lamp. If the lamp still fails to light, inspect for a burned out lamp in the cluster. Refer to the proper Body Diagnostic Procedures manual for more in depth testing.

The oil pressure switch is located on the right rear side of the engine block (Fig. 103). The oil pressure switch is a pressure sensitive switch that is activated by the engine's oil pressure (in the main oil gallery).

The switch is a two terminal device (one terminal is provided to the wiring harness and the other terminal is the switch's metal housing that screws into the engine block).

OPERATION
The oil pressure switch is normally "Closed." The switch changes from a "Closed" circuit to an "Open" circuit, on increasing pressure of 7 psi". The oil pressure switch changes from an "Open" circuit to a "Closed" circuit, on decreasing pressure, between 2 psig and 4 psi".
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2003 GT M/T in Onyx Green Pearl on Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17. Dark Slate Gray Interior. OEM cargo net, parcel shelf, slush mats and trunk protector, mud flaps, mopar subwoofer. Platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover. Generic lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit. Urethane insert engine mounts. Energy suspension full body urethane bushing kit. Chrysler premium front speakers, Jenson 6x9 rears. Boston Audio 4x55W amp. Panasonic head unit with xtenzi bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter
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Old 06 May 2017, 02:39 pm
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Default Re: disable the oil pressure sensor

I did some more reading a determined someone tried this before but on a 2005 pt cruiser, it might be a different

Quote:
Originally Posted by http://www.yellowbullet.com/forum/showpost.php?p=9997207&postcount=10
Replaced the sender with a Chrysler part. While I had it apart I did some testing. This must have a module that buffers the signal or a smart cluster of some sort. Light isn't hardwired to switch as I can remove the wire from the sender and turn the key on and the light stays on, can start the car and the light stays on with the wire off. Checked the switch and it's a normally closed to ground switch which opens when pressure is applied so the disconnecting the wire would disable the light if hard wired.

There's only one DTC code related to the oil pressure light, P0522 - which only triggers if the oil light is 'shorted' to ground. If the circuit is simply open, the light should stay off.

SYMPTOM
P0522-OIL PRESSURE SENSOR LOW

WHEN MONITORED
With the ignition key on and battery voltage above 10.4 volts .

SET CONDITION
The oil pressure sensor voltage at PCM goes below 0.1 of a volt for 0.5 of a second .

POSSIBLE CAUSES
Oil pressure sensor voltage below 0.1 Volts
Oil pressure sensor internal failure
(G6) oil press signal shorted to ground
PCM
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2003 GT M/T in Onyx Green Pearl on Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17. Dark Slate Gray Interior. OEM cargo net, parcel shelf, slush mats and trunk protector, mud flaps, mopar subwoofer. Platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover. Generic lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit. Urethane insert engine mounts. Energy suspension full body urethane bushing kit. Chrysler premium front speakers, Jenson 6x9 rears. Boston Audio 4x55W amp. Panasonic head unit with xtenzi bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter
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Old 08 May 2017, 12:55 am
_PTGT03's Avatar
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Default Re: disable the oil pressure sensor

I can confirm after testing that the check engine light of the oil light does not come on now.
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2003 GT M/T in Onyx Green Pearl on Michelin Pilot Sport AS 3 Plus Tires 205/50ZR17. Dark Slate Gray Interior. OEM cargo net, parcel shelf, slush mats and trunk protector, mud flaps, mopar subwoofer. Platinum edition pedals, Neon SX 2.0 steering wheel with black+grey wrapped leather cover. Generic lowering springs, KYB gas shocks, Valeo solid flywheel conversion and clutch kit. Urethane insert engine mounts. Energy suspension full body urethane bushing kit. Chrysler premium front speakers, Jenson 6x9 rears. Boston Audio 4x55W amp. Panasonic head unit with xtenzi bluetooth. 300W AC power inverter. Escort 360max and Escort Shifter ZR4, dual front+rear dash camera. stage 1 blow off valve and syked tune computer . Boost and oil pressure gauges with Turbo-Timer. Needswings 3" exhaust elbow, Electric valve actuated Y-pipe with catalytic converter. To do: coilovers, 2step controller, quaife diff, Air-Fuel Meter
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