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3 week old FiST throwing CEL - P0451

2315 Views 3 Replies 2 Participants Last post by  scooby2
Has anyone seen this before? I cleared it once and it came back after a few days. I really cannot believe this thing is throwing a CEL already. The dealer cannot get me a loaner until next week.
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P0451 - Evaporative Emission System Pressure Sensor/Switch Range/Performance
This DTC sets when a fuel tank pressure (FTP) sensor range (offset) concern is detected. The FTP sensor output is offset by greater than 1.7 inches of water or less than -1.7 inches of water.
Possible Causes:
  • Intermittent open in the FTP sensor
  • Intermittent short in the FTP sensor
  • Intermittent open FTP circuit
  • Intermittent short FTP circuit
  • Contaminated FTP sensor
  • Damaged FTP sensor
  • Damaged PCM

I am sure the dealer will fix it just fine.

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Thanks for the quick response.
Verdict was the fuel pressure vapor sensor was bad and they replaced it. Everything seems good now!
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