P0520 & p1521 error codes 300c 5.7l - Chrysler 300C Forum: 300C & SRT8 Forums
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post #1 of 28 (permalink) Old 07-27-2013, 06:49 PM Thread Starter
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P0520 & p1521 error codes 300c 5.7l

Okay so I went for an ETEST yesterday and ended up FAILING

OBD shows P0520 & P1521 ERROR CODES

P0520 is the Engine Oil Pressure Sensor/Switch Circuit malfunction and
P1521 means the engine oil is incorrect.

So I got the engine oil sensor replaced, and tada, the engine light went away, but however, the mechanic told me to drive around the car a bit and see if theirs any more issues. No issues for the night. I'm driving to get Etest again, and the engine light comes back. The mechanic is unavailable for the weekend . I'm suspecting that, the P0520 Code has cleared and now its just the P1521 code thats left, and the reason why this code is appearing is because now that the sensors work, its trying to tell me that the engine oil is bad.

So what should I do for the time being until mechanic comes back? Change the oil into the synthetic 5W-20 oil, will that resolve the issue or should I just wait for the mechanic?

PS this is a 2005 CHRYSLER 300C 5.7 L HEMI

help would be greatly appreciated!! thanks
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post #2 of 28 (permalink) Old 07-27-2013, 07:30 PM
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You can run it. Just make sure the oil level is correct .

The P0520 is usually the culprit that eventually sets the P1521 code even if the right viscosity oil is used.

You can try to reset the code if you like. Just disconnect the negative battery cable and leave it disconnected for 30 minutes. Just realize that by doing this some of your memory presets (seat memory, etc...) will have to be re-set.

Michael
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post #3 of 28 (permalink) Old 07-27-2013, 07:54 PM Thread Starter
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Quote:
Originally Posted by MADDOG View Post
You can run it. Just make sure the oil level is correct .

The P0520 is usually the culprit that eventually sets the P1521 code even if the right viscosity oil is used.

You can try to reset the code if you like. Just disconnect the negative battery cable and leave it disconnected for 30 minutes. Just realize that by doing this some of your memory presets (seat memory, etc...) will have to be re-set.
The light went away completely after the sensor was changed. But the engine light came back, I would reset it, but then i'm afraid of it failing the e-test again :[

Ps, I have no way of checking codes. Those codes are what was left on the failed e-test report.
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post #4 of 28 (permalink) Old 07-27-2013, 08:04 PM
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There was a dealer who put the wrong oil in a 5.7 where I am (while ago now).
It had the same systems and caused the engine light to stay on. So he dumped the oil and filter again, which fixed the problem.

Theres an app called Torque which can read the codes but you will need the Bluetooth OBD connection, which can get for 20 or 30 dollars.



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post #5 of 28 (permalink) Old 07-27-2013, 08:09 PM
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You do have a way to check your codes:

How to Display OBD-II Trouble Codes On Instrument Cluster (Works with or without EVIC).


1. Get in the car, close the door.
Perform steps 2-6 fairly quickly (less than 3 sec's total time).
(The key should not return to the OFF position through this next sequence!)

2. Turn key to 'ON' position
3. then back to 'ACC'
4. then to 'ON'
5. then back to 'ACC'
6. then to 'ON'

If there are any stored codes, they will appear immediately, in place of the odometer. Once the codes have been displayed, you'll see "-----". If there are no trouble codes, the dashes will be the first item displayed.
After a few seconds, the display changes to "-dOnE-".

Here is a link to all standard generic OBD-II DTC codes: OBD-II Check Engine Light Trouble Codes
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post #6 of 28 (permalink) Old 07-27-2013, 08:13 PM
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Totally forgot you could do that. Thanks MD.

Did make me wonder how you could do that on the second Gen with the push button start.
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post #7 of 28 (permalink) Old 07-27-2013, 08:22 PM
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I have wondered about that myself. It seems that's one step closer to the owner not having any options to diagnose and fix problems with their own car. In my view, THAT SUCKS!
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post #8 of 28 (permalink) Old 07-27-2013, 08:25 PM Thread Starter
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Quote:
Originally Posted by MADDOG View Post
You do have a way to check your codes:

How to Display OBD-II Trouble Codes On Instrument Cluster (Works with or without EVIC).


1. Get in the car, close the door.
Perform steps 2-6 fairly quickly (less than 3 sec's total time).
(The key should not return to the OFF position through this next sequence!)

2. Turn key to 'ON' position
3. then back to 'ACC'
4. then to 'ON'
5. then back to 'ACC'
6. then to 'ON'

If there are any stored codes, they will appear immediately, in place of the odometer. Once the codes have been displayed, you'll see "-----". If there are no trouble codes, the dashes will be the first item displayed.
After a few seconds, the display changes to "-dOnE-".

Here is a link to all standard generic OBD-II DTC codes: OBD-II Check Engine Light Trouble Codes
Thanks. Going to try this tomorrow and if I get P1521 i'm going to flush oil and get it changed into the proper one.

EDIT: Should I try the battery thing first or oil change if I get P1521..?

And also. I don't know the type of engine oil that was put in before this, I bought the car AS IS.

Last edited by nexus313; 07-27-2013 at 08:28 PM.
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post #9 of 28 (permalink) Old 07-27-2013, 08:32 PM
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I don't think you need to flush out the oil at this point. The P0520 is almost a "sympathetic" code that gets set almost by accident when the sensor code is activated. You should be able to clear it and not have it come back.

5W/20 is the proper oil for your car.
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post #10 of 28 (permalink) Old 07-27-2013, 08:38 PM Thread Starter
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Quote:
Originally Posted by MADDOG View Post
I don't think you need to flush out the oil at this point. The P0520 is almost a "sympathetic" code that gets set almost by accident when the sensor code is activated. You should be able to clear it and not have it come back.

5W/20 is the proper oil for your car.
But the part that makes me nervous is, the fact the engine light came back after clearing the code and fixing the problem..

What if I clear it and it keeps coming back? Does that mean the issue is not solved :[ ?
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