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Possible fuel pressure issue

Tiny
PAMBER
  • MEMBER
  • 1999 PONTIAC MONTANA
  • 3.4L
  • 6 CYL
  • FWD
  • AUTOMATIC
  • 82,000 MILES
I got two OBDII codes p0452 and p0453 both are FTP sensor low and high, I checked this because when I went to start my van after getting gas, it started, ran sputtery, and died, now it turns over but if it starts(barely) it just dies. The check engine light goes on and the oil light. OBDII code says its the FTP dendor, just wanna verify im on the right track
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Wednesday, April 19th, 2017 AT 1:18 PM

1 Reply

Tiny
CARADIODOC
  • MECHANIC
  • 33,743 POSTS
P0452 - Evaporative Emission Control System Pressure Sensor Low Input
P0453 - Evaporative Emission Control System Pressure Sensor High Input

The common mistake is the fault codes do not say to replace a part or that one is bad. They never do.
While it is possible the sensor is defective, setting two opposing codes is much more likely to be the result of a wiring or connector terminal problem. Also, problems in the vapor recovery system won't stop an engine from starting and running. For that, a better suspect is a failed fuel pump. A pressure gauge would show the lack of fuel pressure, but you must also check for spark. More crank / no-start problems are caused by a loss of injector pulses AND spark, than are caused by a loss of either one.
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Wednesday, April 19th, 2017 AT 2:36 PM

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