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  #1 (permalink)  
Old 02-17-2009, 10:35 PM
 
Join Date: Nov 2007
Location: Maryland
Posts: 184
Default Code P0453 Fuel tank pressure sensor/switch high.


As said in the title. This code came up when i scanned when my check engine light was on. Has anyone had any experience with this code coming up? It would be much appreciated for any information and to see what others did about it.



Bryan
Howard County, MD
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Old 02-19-2009, 12:45 PM
 
Join Date: Nov 2007
Location: Maryland
Posts: 184
Default Re: Code P0453 Fuel tank pressure sensor/switch high.


soooo i am the only one ever to have this problem? wow thats amazing haha. anyone please want to help?



Bryan
Howard County, MD
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  #3 (permalink)  
Old 02-19-2009, 12:59 PM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


Some people around here are slow to repond... but they will. I personally can not help you because I am not familiar with the codes. Sorry
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Old 02-19-2009, 01:39 PM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


My daughter incurred a CEL on her Saturn when the seal around the gas filler cap would not seat right. If it doesn't, the car thinks there is a leak. I don't recall if there is a vacuum or pressure situation, but it requires a tight seal.


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Old 02-19-2009, 03:10 PM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


Goldwing.... that sounds logical... I know that a loose gas cap will cause a CEL... but I havent seen anyone post the DTC for it....


MikeR


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Old 02-19-2009, 09:48 PM
 
Join Date: Nov 2007
Location: Maryland
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


from talking to my mechanic that ran the code it has something to do with one of my valves not letting out fumes or moisture from my tank as it is suppose to. i was told it wont bother anything until i have to take emissions. wierd that the code has not been brought up before. thank you for the responses. more insight would be great if there are any mechanics out there haha.



Bryan
Howard County, MD
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Old 02-19-2009, 10:44 PM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


Quote:
Originally Posted by makeithappen
As said in the title. This code came up when i scanned when my check engine light was on. Has anyone had any experience with this code coming up? It would be much appreciated for any information and to see what others did about it.
Reading the shop manual Evaporative Emissions section 25-15, it looks like the EVAP purge solenoid is not working and the excess pressure is discharged via the filler cap. This purging would be a cause to fail any emissions test as you know. The code is kept on record, hence the engine light stays on.
See page 25-15 for a diagram of the Evaporation Control system.

The following is the full description of this fault.
P0453 Evaporative Emission Control System Pressure Sensor High Input

I am no expert by any means but it is always interesting to look at possible causes of problems.

Last edited by onehundred80; 02-19-2009 at 10:48 PM.
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Old 02-21-2009, 10:51 AM
 
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Location: Maryland
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


Thanks for looking into it. That is actually an explination i understand haha now i just need to find how to fix this.



Bryan
Howard County, MD
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Old 10-19-2010, 06:25 PM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


Quote:
Originally Posted by makeithappen
Thanks for looking into it. That is actually an explination i understand haha now i just need to find how to fix this.
Well, I wonder what this guy ever did? Now I have the code!

Anyway, THIS LINK says to "use a scan tool access FTP sensor value with Key on Engine off (KOEO)".

I know I can buy an instrument to read the codes (and I am about to spend the money on one), but what Scan Tool can I buy to read the voltage at the sensor, using the connector??? I might just consider spending the money for that. The idea of clipping a DVM on some wires somewhere to monitor the voltage sounds a bit inconvenient.

Just noticed something... .HEY MODS, how 'bout moving this to a more appropriate forum?


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Last edited by pizzaguy; 10-19-2010 at 06:28 PM.
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  #10 (permalink)  
Old 10-19-2010, 07:01 PM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


Quote:
Originally Posted by pizzaguy
I know I can buy an instrument to read the codes (and I am about to spend the money on one), but what Scan Tool can I buy...
Forget it, just priced a DRB III - not gonna happen.

Besides, just got access to the wires to the sensor in the Top Compartment - wonder how hard this would have been in a Coupe?


Founding member and Grand Pooh-Bah of the Crossfire High Mileage Club - 106,120 and counting!
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"Built on the Mercedes R170/SLK320 platform... the Crossfire has taken on, sort of, a cult following."
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Old 10-19-2010, 10:03 PM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


DAMN I'M GOOD! I think I fixed my car.

I started the car and measured 2.99 volts on the pressure sensor wire at the gas tank sending unit. But as I wiggled the connector, the voltage shot to 5.00, indicating my ground was going away OR the sensor was bad.

Taking the connector off, I saw it - terrible corrosion on the plug. I cleaned the plug and pins with alcohol and let the whole thing dry. NOW when I wiggle the connector, the 2.99 volts is steady as a rock.

I suspect that, after several "good trips", the light will go out and stay out.


BAD NEWS: Water causes corrosion. The only way water got in there was me. I've not been as careful when washing the car with the top down as I thought.


Founding member and Grand Pooh-Bah of the Crossfire High Mileage Club - 106,120 and counting!
Issues so far: EGR Valve Replaced, Ignition Cylinder Repaired, Twice Resoldered RCM



"Built on the Mercedes R170/SLK320 platform... the Crossfire has taken on, sort of, a cult following."
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Old 10-20-2010, 05:28 AM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


WOOT!!!!
Good troubleshooting !!! That is great news !!!

BTW, this is why I'm a firm believer in using Dielectric Grease on all connectors.

Last edited by awilson40; 10-20-2010 at 05:44 AM.
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Old 10-20-2010, 07:02 AM
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Default Re: Code P0453 Fuel tank pressure sensor/switch high.


Quote:
Originally Posted by awilson40
WOOT!!!!
Good troubleshooting !!! That is great news !!!
A big thanks goes to you for pointing me to this thread, AND for THIS link:
P0453 DTC Evaporative Emissions Control System Pressure Sensor High Input

Together, I learned enough to understand the service manual a LOT better.


Quote:
BTW, this is why I'm a firm believer in using Dielectric Grease on all connectors.
We use it here at work a lot, kinda leaves me wondering why it wasn't used more in these cars.


Founding member and Grand Pooh-Bah of the Crossfire High Mileage Club - 106,120 and counting!
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Old 10-20-2010, 07:02 AM
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