Malfunction - Oil pressure sensor - Chrysler 300C Forum: 300C & SRT8 Forums
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post #1 of 12 (permalink) Old 08-06-2007, 01:22 AM Thread Starter
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Malfunction - Oil pressure sensor

My 300C 5.7 malfunction light has come on 3 times.
Each time the malfunction indicator symbol on the dash illuminates continuously after you start the car and after one dedicated alarm sounding. After several visits to the dealer it seems the fault was caused by an oil pressure sensor alarm.
First time it occured (around 11000kms) I took it to the dealer they identified the oil pressure sensor had alarmed they checked it over found nothing so they reset and requested I monitor and advise if it happened again.
Second time it happened just days before the 12,000km service so I requested they look at it again as part of the service. When collecting the car they advised that they had reset the pressure sensor parameters/levels and that this should fix it.
The third and last fault occured again a few days after the service.(last week) This time the dealer kept the car overnight. I collected the car next day and they said its fine to drive advising they have now ordered a new pressure sensor to replace the existing which they say is faulty? I am currently waiting for the dealer to call when they have the replacement sensor..
Some background:
In each case the alarm occured during normal driving conditions and on the 3rd occasion happend whilst the car was idling at the traffic lights. During the third occurence the malfunction light simply stopped illuminating on the dash after a day even though the dealers mechanic stated that once an alarm/fault condition had registered that it could only be reset (deactivated) by them patching into the vehicles computer? (this is contrary to the manual which states that such alarm conditions can simply cease)
The fault occured prior to and following the dealers oil change at the 12000km service. The dealer tells me they use Mobil 1 5w30 on all the 300C 5.7's.
Has anyone else experienced this problem of an oil pressure sensor alarm? If so can you provide any relevant background info?
The dealers service so far has been great but the conviction of their explanation of the fault and diagnosis combined with my previous bad experiences with incompetent dealers (other brands) leaves me somewhat suspicious and concerned if there may indeed be an oil pressure problem?

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post #2 of 12 (permalink) Old 08-06-2007, 01:34 AM
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I would hope that when they checked the motor to investigate the warning light that they did actually check the oil pressure via an externally connected gauge.

One of my Holdens had a problem, ie. I noticed that the oil pressure light would stay on for longer at start up, especially cold starts, but would then go out. The dealer hooked up an oil pressure gauge and concluded that the pressure was slow to build and dropped off as the revs increased. It turned out to be the gasket between the oil pick-up tube and the engine block bleeding air into the system.

Fortunately I was observant and noticed the problem as soon as it became evident so drove gently, so no significant damage was done.

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post #3 of 12 (permalink) Old 08-06-2007, 09:08 PM
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Are you getting any trouble codes?
I always wonder if using 5W30 oil somehow causes real or false trouble codes.
The car was designed for 5W20, but for some reason, 5W30 is used outside the USA.

Here are some codes from the Service Manual.

P0520-ENGINE OIL PRESSURE SENSOR CIRCUIT
Possible Causes
(G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
RESISTANCE (G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT
(G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
RESISTANCE IN (F856) 5-VOLT SUPPLY CIRCUIT
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT
ENGINE OIL PRESSURE SENSOR
PCM
Always

P0521-ENGINE OIL PRESSURE SENSOR PERFORMANCE
Possible Causes
ENGINE OIL/ENGINE MECHANICAL
(G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
RESISTANCE (G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT
(G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
RESISTANCE IN (F856) 5-VOLT SUPPLY CIRCUIT
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
RESISTANCE IN THE (K900) SENSOR RETURN CIRCUIT
ENGINE OIL PRESSURE SENSOR
PCM

P0522-ENGINE OIL PRESSURE SENSOR CIRCUIT LOW
Possible Causes
(F856) 5-VOLT SUPPLY CIRCUIT OPEN
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
(G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT SHORTED TO GROUND
(G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT SHORTED TO THE (K900) SENSOR GROUND CIRCUIT
ENGINE OIL PRESSURE SENSOR
PCM

P0523-ENGINE OIL PRESSURE SENSOR CIRCUIT HIGH
Possible Causes
(G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
(G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT OPEN
(G6) ENGINE OIL PRESSURE SIGNAL CIRCUIT SHORTED TO THE (F856) 5-VOLT SUPPLY CIRCUIT
(K900) SENSOR GROUND CIRCUIT OPEN
ENGINE OIL PRESSURE SENSOR
PCM

P0524-ENGINE OIL PRESSURE TOO LOW
Possible Causes
ENGINE OIL/ENGINE MECHANICAL
(G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO BATTERY VOLTAGE
RESISTANCE (G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT
(G6) ENGINE OIL PRESSURE SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
RESISTANCE IN (F856) 5-VOLT SUPPLY CIRCUIT
(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
RESISTANCE IN THE (K900) SENSOR RETURN CIRCUIT
ENGINE OIL PRESSURE SENSOR
PCM
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post #4 of 12 (permalink) Old 08-06-2007, 09:52 PM
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Did you check the oil pressure readings through the EVIC? What is it typically reading? In everything I've read I've found that 5w20 is a _must_.


________2005 Midnight Blue 300C__________

Last edited by dunsantos; 08-06-2007 at 09:52 PM.
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post #5 of 12 (permalink) Old 08-06-2007, 10:33 PM
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Joey, you are doing a great job providing the detail stuff. I read you other post about the errors being generated on another member's Hemi the other day and thought this could be related.


Quote:
Originally Posted by dunsantos View Post
Did you check the oil pressure readings through the EVIC? What is it typically reading? In everything I've read I've found that 5w20 is a _must_.
dunsantos, I was thinking that myself but was unsure if the Easter Egg does display pressure as I haven't played with it lately.
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post #6 of 12 (permalink) Old 08-06-2007, 11:18 PM
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These pics are from CCN version 3.60, but I think the later versions have the same Oil Pressure gages. I am no gear head and don't what the PSI number should be, or how to tell if there is a problem.
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post #7 of 12 (permalink) Old 08-07-2007, 05:05 AM Thread Starter
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Appreciate your responses. Joey you lost me after the first few lines but I have printed off your info and will discuss it further with the dealer. Cheers!
I have checked and monitored the oil pressure display as instructed by the dealer after the first reported alarm and they advised that all readings were within the normal ranges.
ie: At idle after engines hot oil pressure reading is at around 2 - 2.2bar, cruises around 3 -4 bar and during accelaration goes up a over 4 bar.
These are all normal I am told?
I originally thought it possible that thru the computers monitoring functions it may indeed be detecting that the oil is 5w 30 oil and not 5w 20 and therefore registers as an alarm. However having reviewed other postings on the Forum it seems many of us are using this oil but nobody else appears to have had this alarm function?
Anyway I Hope to here from the dealer in the next few days so i will post again soon.
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post #8 of 12 (permalink) Old 08-11-2007, 11:53 PM
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My oil pressure readings are around 20 idle and up to 57 or so during acceleration.
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post #9 of 12 (permalink) Old 03-12-2011, 09:42 AM
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How do you read the oil pressure on a 2005 300 C
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post #10 of 12 (permalink) Old 03-12-2011, 09:54 PM
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Quote:
Originally Posted by captnmarcus View Post
How do you read the oil pressure on a 2005 300 C

see previous thread on EVIC (lots more info than just oil pressure)

EVIC Oil Pressure?
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