Question about 1997 Pontiac Grand Prix

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1997 Pontiac Grand Prix Evac Canister Pressure to low

Trying to get this car to pass smog test but keep getting code back evap canister pressure to low. Now what do i do

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Check hoses for cracks and holes at the pictured locations
1997 Pontiac Grand Prix Evac Canister Pressure to  - 84c815b.jpg d29077b.jpg 55c4546.jpg

Posted on May 26, 2009

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Posted on Jan 02, 2017

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NEED HELP ON A 04 PONTIAC GRAND PRIX 3.8 AND CODE P0446


YOUR DTC P0446 is a EVAP problem ! EVAP - Evaporative Emissions System . Do you know what it is an how it works >
This DTC tests the evaporative emission (EVAP) system for a restricted or blocked EVAP vent path. The control module commands the EVAP canister purge solenoid valve Open and the EVAP canister vent solenoid valve Closed. This allows vacuum to be applied to the EVAP system. Once a calibrated vacuum level has been reached, the control module commands the EVAP canister purge solenoid valve Closed and the EVAP canister vent solenoid valve Open. The control module monitors the fuel tank pressure (FTP) sensor for a decrease in vacuum. If the vacuum does not decrease to near 0 inches H2O in a calibrated time, this DTC sets.
How Does the Evaporative Emissions System Work EVAP Codes

Wells EVAP Training with Sgt Tech P0440 P0441 P0442 etc

Apr 08, 2017 | Pontiac Cars & Trucks

3 Answers

WHAT DOES FAULT CODE P1446-00 MEAN


older nissan? evap canister purge fault. check for loose or rotten/disconnected vacuum hoses before testing the vapor canister purge valve.
25439609-xipalmoknr3fbjmp51kycajc-2-0.jpg The charcoal canisters also clog up. Do some diagnosing before you go changing parts.

Feb 16, 2015 | Cars & Trucks

1 Answer

Need to pass smog test. Trouble light is on.


The code is for vent valve circuit. the vent valve is part of the evap. canister and is sold in one unit.Before you spend to much money on evap canister let mechanic inspect the valve and confirm the problem
Good Luck

Mar 23, 2014 | 1998 Toyota Corolla

1 Answer

P0544 Code and problems with my Mechanics!


There is no code P0544 , maybe you mean P0455 ?
The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge solenoid valve OPEN and the EVAP canister vent solenoid valve CLOSED . This allows engine vacuum to enter the EVAP system. At a calibrated time, or vacuum level, the control module commands the EVAP canister purge solenoid valve closed, sealing the system, and monitors the FTP sensor input in order to determine the EVAP system vacuum level. If the system is unable to achieve the calibrated vacuum level, or if the vacuum level decreases too rapidly, this DTC sets.

It's called EVAP purge solenoid , the front one . An your Mechanic is probably not full of it . You need to know how the system works . If the computer set's a code for that system , it will not test it again till it's fixed an sometime other problems come up . After he fixed the first problem he should have told you that after a day or two or a couple of key cycles , starting the car cold till warm an a cold start again , sitting over night , 8 hours . Then the computer will retest the system . An other codes may set . Before putting blame , you should have to read about OBD 2 emissions , before being able to have a vehicle .

Mar 20, 2017 | 2004 Pontiac Grand Prix

1 Answer

Check engine light on got a diognostic and code P0128, P0420, and P0455 popped up trying to figure out what these codes mean and what I need to fix on my car


P0128 ECT Sensor Below Thermostat Regulating Temperature

P0420 Catalyst System Bank 1 Low Efficiency

P0455 EVAP System Large Leak (0.080") Detected

For the 'P0128' your engine isn't getting up to operating temerature. This could be because of a low coolant level or your thermostat is stuck open. For 'P0420', this indicates your catalyst isn't working as well as it should. If you have a four cylinder, this will be the first cat in the system, if you have a V6, then it will be the one on the driver side. Since this code can also indicate a clogged catalyst, you should get this checked at an exhaust shop. They can do a back pressure test to see if it is clogged. For the 'P0455', this indicates you have a fuel leak from the pressure system in the fuel tank. The EVAP takes fuel from the tank that builds up pressure and stores it in a canister until you start the engine. Then it shunts this fuel into the engine to be burned.

Jan 06, 2011 | 2005 Pontiac Grand Prix

1 Answer

I had an emission test done on my 98 bonneville and it failed because code P0440 evap control system what should i do ?


Here's list why your car is coming up with this code. It could be any of these things causing it.
DTC detecting condition:
  • EVAP control system has a leak.
  • EVAP control system does not operate properly.
Possible cause:
  • Incorrect fuel tank vacuum relief valve
  • Incorrect fuel filler cap used
  • Fuel filler cap remains open or fails to close.
  • Foreign matter caught in fuel filler cap.
  • Leak is in line between intake manifold and EVAP canister purge volume control solenoid valve.
  • Foreign matter caught in EVAP canister vent control valve.
  • EVAP canister or fuel tank leaks
  • EVAP purge line (pipe and rubber tube) leaks
  • EVAP purge line rubber tube bent
  • Blocked or bent rubber tube to EVAP control system pressure sensor
  • Loose or disconnected rubber tube
  • EVAP canister vent control valve and the circuit
  • EVAP canister purge volume control solenoid valve
  • EVAP canister purge volume control solenoid valve and the circuit
  • Absolute pressure sensor
  • Fuel tank temperature sensor
  • O-ring of EVAP canister vent control valve is missing or damaged
  • Water separator
  • EVAP canister is saturated with water
  • EVAP control system pressure sensor
  • Refueling control valve
  • ORVR system leaks
  • Fuel level sensor and the circuit

Apr 01, 2010 | 1998 Pontiac Bonneville

1 Answer

Engine light on-trouble code P0452


EVAP fuel tank pressure sensor low output. It sounds like the charcoal -filled canister, it's near the gas tank in a cylinder shape.The canister may have cracks or a hose is leaking around the area and it will give a fault code of PO452. Are you smelling any odors or emission smell from the car?

Feb 26, 2010 | 2002 Ford Expedition

1 Answer

"evap canister" almost cracked off. What exactly does it do? Should it be replaced?


Yes, you should replace it. This canister is to take the fumes from your gas tank into your engine. You need this to pass your state smog test.

May 27, 2009 | 1997 Jeep Grand Cherokee

1 Answer

Evap canister


it has to be replaced.

Mar 30, 2009 | 1997 Pontiac Grand Prix

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