Fuel tank pressure sensor

2006 CADILLAC CTS

97,231 MILES • 2.8L • V6 • 2WD • AUTOMATIC

THE AUTO FIX

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Location of sensor. Have a p0451 code. Replaced the gas cap. Purchased sensor. Not sure if it’s on top of fuel tank or canister. Need your help.

Thanks

Jun 30, 2022 at 11:38 AM

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STRAILER

CAR REPAIR CONTRIBUTOR
54,189 POSTS

It looks like the fuel tank pressure sensor is on the charcoal canister in the rear of the vehicle. Here is the location of the sensor and how to change it out in the diagrams below. Check out the diagrams (below). Please let us know if you need anything else to get the problem fixed.

Images (Click to enlarge)

Jul 1, 2022 at 9:30 AM

THE AUTO FIX

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6 POSTS

Thank you for your help pertaining to this matter. You guys are a God sent. Will let you know my results.

Jul 1, 2022 at 11:26 AM

THE AUTO FIX

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6 POSTS

Would all engine sizes sensor location be on the canister design the wheel wells?

Thank you

Jul 12, 2022 at 6:49 PM (Merged)

SQM

CAR REPAIR CONTRIBUTOR
6,383 POSTS

Hello,

The fuel tank pressure sensor is located on the EVAP canister.
It is the same location regardless of the engine size (2.8L or 3.6L).

I have attached diagrams below for your reference.

Let me know of any questions.
Thank you.

Images (Click to enlarge)

Jul 12, 2022 at 6:49 PM (Merged)

THE AUTO FIX

MEMBER
6 POSTS

You have commutated the sensors part of the charcoal canister. Not sure of the exact location of the canister. Would much appreciate your help with this matter.

Jul 12, 2022 at 6:49 PM (Merged)