Wire color from fuel tank harness?

Tiny
RICKDB1
  • MEMBER
  • 2004 BUICK RENDEZVOUS
  • 3.4L
  • V6
  • 2WD
  • AUTOMATIC
  • 140,000 MILES
The are 3 possible colors for the Fuel Tank Pressure Sensor signal wire coming from the fuel tank harness. I believe it is the Green wire that is the sensor wire going to the PCM. Can anyone verify if this is the correct wire? The connector under the car was filled with water and corroded, which I assume made the car throw a Check Engine light for "Fuel Tank Pressure High" P0453 code. Going to try and rewire the sensor wire and bypass the corroded connector. Just making sure I'm doing the right wire/color. Thank in advance.
Tuesday, February 24th, 2026 AT 3:02 PM

2 Replies

Tiny
KEN L
  • MASTER CERTIFIED MECHANIC
  • 54,920 POSTS
Yep the corrosion will give you that code, here is the wiring diagram for the fuel tank pressure sensor so you can make the repairs. Check out the images (below). Let us know how it goes. Ken
Image (Click to make bigger)
Thumb
Was this
answer
helpful?
Yes
No
Wednesday, February 25th, 2026 AT 8:29 AM
Tiny
RICKDB1
  • MEMBER
  • 2 POSTS
Thank you Ken! Will let you know how it goes after I bypass that nasty connector. The problem was about to beat me, until I ran across others that said the connector could be the culprit. Again, thanks and I will try to post some pic of the redo.
Was this
answer
helpful?
Yes
No
Wednesday, February 25th, 2026 AT 9:46 AM

Please login or register to post a reply.

Related Fuel System Tank Pressure Sensor Content

VIEW MORE