code PO452

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Tim - 17 Mar 2008 20:50 GMT

98 Jimmy I got a service code of PO452. It said something about emission
code.

Any ideas what this is. I did have the fuel pump replaced a couple months
ago.

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Steve W. - 17 Mar 2008 22:32 GMT

> 98 Jimmy I got a service code of PO452. It said something about emission
> code.
>
> Any ideas what this is. I did have the fuel pump replaced a couple months
> ago.

Evaporative Emission Control System Pressure Sensor Low Input

The sensor on the tank is reading low or the wiring is shorted.
Wire might have been pinched when the pump was replaced and took a while
for the insulation to wear through. Drop the tank and check the harness
off the sensor and test the sensor while you have it apart.

Signature

Steve W.
Near Cooperstown, New York

Life is not like a box of chocolates
it's more like a jar of jalapenos-
what you do today could burn your a.s tomorrow!

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Tim - 19 Mar 2008 12:56 GMT

Dropping tank sounds like more then I can do.

>> 98 Jimmy I got a service code of PO452. It said something about emission
>> code.
[quoted text clipped - 8 lines]
> for the insulation to wear through. Drop the tank and check the harness
> off the sensor and test the sensor while you have it apart.

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Woody - 19 Mar 2008 13:42 GMT

Did you check your gas cap?

> 98 Jimmy I got a service code of PO452. It said something about emission
> code.
>
> Any ideas what this is. I did have the fuel pump replaced a couple months
> ago.

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Steve W. - 19 Mar 2008 14:50 GMT

> Did you check your gas cap?
>
[quoted text clipped - 3 lines]
>> Any ideas what this is. I did have the fuel pump replaced a couple months
>> ago.

Bad cap wouldn't set this code.
It is set because the ECM expects the sensor to be within a set range
when it isn't testing the evap system. If it is high or low it sets a code.

Signature

Steve W.
Near Cooperstown, New York

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Tim - 19 Mar 2008 15:42 GMT

Will this cause the car to stop running or not start?

>> Did you check your gas cap?
>>
[quoted text clipped - 7 lines]
> It is set because the ECM expects the sensor to be within a set range when
> it isn't testing the evap system. If it is high or low it sets a code.

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aarcuda69062 - 19 Mar 2008 15:43 GMT

> Will this cause the car to stop running or not start?

If that pressure sensor was shorted and shared circuitry with
another critical sensor, yes.

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Steve W. - 19 Mar 2008 22:08 GMT

> Will this cause the car to stop running or not start?

If it is ONLY the sensor going bad it shouldn't. It will just trigger
the SEL.
However if the wiring harness is shorting it could be shutting of power
to the fuel pump as well.

Signature

Steve W.
Near Cooperstown, New York

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