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Fuel tank pressure sensor

Tiny
THE AUTO FIX
  • MEMBER
  • 2006 CADILLAC CTS
  • 2.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 97,231 MILES
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
Thursday, June 30th, 2022 AT 11:38 AM

5 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 47,643 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.
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Friday, July 1st, 2022 AT 9:30 AM
Tiny
THE AUTO FIX
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Thank you for your help pertaining to this matter. You guys are a God sent. Will let you know my results.
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Friday, July 1st, 2022 AT 11:26 AM
Tiny
THE AUTO FIX
  • MEMBER
  • 6 POSTS
  • 2006 CADILLAC CTS
  • 2.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 97,000 MILES
Would all engine sizes sensor location be on the canister design the wheel wells?

Thank you
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Tuesday, July 12th, 2022 AT 6:49 PM (Merged)
Tiny
SQM
  • MECHANIC
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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.
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Tuesday, July 12th, 2022 AT 6:49 PM (Merged)
Tiny
THE AUTO FIX
  • MEMBER
  • 6 POSTS
  • 2006 CADILLAC CTS
  • 2.8L
  • V6
  • 2WD
  • AUTOMATIC
  • 92,359 MILES
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.
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Tuesday, July 12th, 2022 AT 6:49 PM (Merged)

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