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Old 10-19-2018, 02:31 PM   #1
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Check Engine - fuel vapor sensor code

Had my local mechanic check codes. He said itís a voltage error fuel vapor sensor. Does that sound right and how difficult is it to replace?

I already disconnected battery and code came back.
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Old 10-19-2018, 02:38 PM   #2
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What is the code?
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Old 10-19-2018, 04:16 PM   #3
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He didnít say
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Old 10-19-2018, 09:30 PM   #4
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There's no such thing as a "fuel vapor sensor" on these cars, which is why I asked.
I suppose he could mean the tank pressure sensor.

You should ask for the code. Alternatively, you can go to an auto parts store and ask them to read the code (free) or buy a cheap code reader.
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Old 10-20-2018, 05:21 AM   #5
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Will do thanks! What cheap code reader would you recommend BTW?
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Old 10-20-2018, 12:01 PM   #6
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P0453 evaporative emission system pressure sensor/switchhad high voltage input
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Old 10-20-2018, 01:33 PM   #7
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a while ago my '07 987 CS threw the same code (evap valve..?) and JFP suggested back-blowing air through the valve while applying 12V to the valve connector (to open the valve).

I disconnected the small tube that connects to the throttle body to the valve and blew air through it and the code never returned, you may want to try it.

The Evap valve its located underneath the driver side intake plenum.

Good luck!
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Old 10-20-2018, 01:44 PM   #8
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BTW my Boxster is Ď99
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Old 10-20-2018, 06:33 PM   #9
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Quote:
Originally Posted by Gilles View Post
a while ago my '07 987 CS threw the same code (evap valve..?) and JFP suggested back-blowing air through the valve while applying 12V to the valve connector (to open the valve).

I disconnected the small tube that connects to the throttle body to the valve and blew air through it and the code never returned, you may want to try it.

The Evap valve its located underneath the driver side intake plenum.

Good luck!
Interesting. Iíll have to find it first. How did you apply 12V?

Saw another post on 453 and it said replace sensor on top of gas tank.
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Old 10-20-2018, 06:41 PM   #10
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Your code (p0453) is for the tank pressure sensor, not the purge valve that Gilles mentioned.
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Old 10-21-2018, 08:20 PM   #11
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Should I try new gas cap ?
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Old 06-21-2019, 09:00 PM   #12
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So it was wires to fuel pressure sensor. Mice ate through insulation. Mechanic said they make the insulation out of peanut oil!
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