vtsnake

iTrader: (16)

Car's throwing these codes: Evap control system. Purge Flow fault and pressure sensor low.

Any idea what i should look for?

Thanks in advance...

oh btw, i did do a search

vtsnake

iTrader: (16)

bump

vtsnake

iTrader: (16)

anyone?

Sp3ctr

yes actualy im having the same problem its a solinoid thats causing it but i dont have the diagnostics that can activate them on command to tell wich one it is (their are 2 in the system one in the rear driver side and one under the hood also driver side) if you know anyone w a good diagnostic then you should be able to pinpoint wich one

BenBob

iTrader: (2)

is your gas cap tight??

mikesevo8

The evap emissions system pieces are, for the most part, tucked into the rear quarter panel, right under the gas fill door.
You can see it by looking under the car. Sounds like something is screwed up.

Here are the code descriptions from the manual


DTC P0441: EVAPORATIVE EMISSION SYSTEM INCORRECT PURGE FLOW

TECHNICAL DESCRIPTION
• ECM detects stuck open condition of evaporative emission purge solenoid valve and stuck closed
condition of evaporative emission ventilation solenoid by pressure change in fuel tank.
• Stuck open evaporative emission purge solenoid is judged through monitoring leak of evaporative emission system.
• Stuck closed evaporative emission ventilation solenoid is judged after 20 seconds from end of
monitoring leak of evaporative emission system, or of usual operation of evaporative emission
purge solenoid from ON to OFF.
.
DTC SET CONDITIONS
Check Conditions
• ON duty cycle of the evaporative emission purge solenoid is 0 percent.
• Engine is running.
• 20 seconds have elapsed since the duty cycle of the evaporative emission purge solenoid has turned to 0 percent.
Judgment Criteria
• The pressure in the fuel tank is −2 kPa (−0.59 in.Hg) or less for 0.1 second.
.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are
• Evaporative emission purge solenoid failed.
• Evaporative emission ventilation solenoid failed.
• Fuel tank differential pressure sensor circuit related part(s) failed.


DTC P0452: Evaporative Emission System Pressure Sensor Low Input

CIRCUIT OPERATION
• The ECM (terminal 81) supplies a 5-volts reference signal to the fuel tank differential pressure sensor (terminal 3).
The fuel tank differential pressure sensor (terminal 2) is grounded through the ECM (terminal 92).
• The fuel tank differential pressure sensor (terminal 1) returns a voltage signal to the ECM (terminal 61) that is proportional to the pressure in the fuel tank.
.
TECHNICAL DESCRIPTION
• The ECM monitors the fuel tank differential pressure sensor output voltage.
• The ECM determines whether the fuel tank differential pressure sensor signal voltage is within normal operating parameters.
.
DTC SET CONDITIONS
Check Conditions:
• Intake air temperature is greater than 5°C (41°F).
• Engine speed is 1,600 r/min or greater.
• Volumetric efficiency is between 20 and 70 percent.
Judgment Criteria
• When the evaporative emission purge solenoid is off, the fuel differential pressure sensor output
voltage remains at 1.0 volt or less for ten seconds.
.
TROUBLESHOOTING HINTS (The most likely causes for this code to be set are
• Malfunction of the fuel tank differential pressure sensor.
• A damaged harness in the fuel tank differential pressure sensor circuit.
• Malfunction of the ECM.

yahh

iTrader: (20)

Did you ever fix this? Throwing the same codes.

yahh

iTrader: (20)

bump