Question about 2005 Pontiac Grand Prix
We have the SAME problem. Where it is coming from is PONtiacs great job of engineering
If you remove the Plastic cowel Trim piece that is at the Bottom of the Winshield. from to do this lift the hood and take off the black platic part that is sealed against the windshield from outside. You will see that water runs down the windshield, under this trim part and drops DIRECTLY into the OPEN top of the fan/heater box. the only protection is a Cabin air filter that looks like a flat air clearner.
The water runs thru the heater box and drips from the fan motor.
I built a small mudflap shield under this trim o part to rout the water away from a direct drop onto the Floorboards. What a P.O.S. design. easy fix would have cost PONTIAC about $2 to design something to prevent this
Posted on Oct 31, 2009
This is either coolant or evaporator water or a water leak entering the vehicle interior...Coolant will emit quite a strong odor which pprobably counts that out..perform wind/water leak diagnosis and verify condenser /evaporator drain tube
Posted on Sep 27, 2009
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Posted on Jan 02, 2017
SOURCE: water in floorboard pass. side.
your a/c drain is stopped up. sometimes you can take a wire coat hanger and run it up the drain and clear it, or take it to any mechanic and he should be able to clear it with compressed air. you will know when its clear, a lot of water will come out.
Posted on Oct 02, 2009
DTC P0641 The powertrain control module (PCM) provides a 5-volt reference to the
The throttle position (TP) sensor 1
The accelerator pedal position (APP) sensor 2
The engine cooling fan speed sensor
The AC pressure sensor
The fuel tank pressure (FTP) sensor
The oil pressure sensor (OPS)
The PCM monitors voltage on the 5-volt reference circuit. If the voltage is higher or lower than required, DTC P0641 will set.
Conditions for Setting the DTC
The PCM detects a voltage that is higher or lower than required on the 5-volt reference circuit. The above condition is present for 1 second. Action Taken When the DTC Sets The control module illuminates the malfunction indicator lamp (MIL) when the diagnostic runs and fails. The control module records the operating conditions at the time the diagnostic fails. The control module stores this information in the Freeze Frame/Failure Records.
Conditions for Clearing the MIL/DTC The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail. A current DTC, Last Test Failed, clears when the diagnostic runs and passes. A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic. Clear the MIL and the DTC with a scan tool.
Yes i can be dangerous, depending which issues mentioned above has triggered the code such as a faulty gas peddle position sensor. the code can also cause a reduced engine power to activate.
Thank you for using Fixya and best advice is to have the dealer address these issues. A tech 2 scanner would be needed to address the P0641 DTC code.
Posted on Mar 19, 2010
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On the driver's side under the car in the area of the rear passenger seat is a small silver can with two quick connect barbs and on the other end a threaded connection. This is the fuel filter.
Posted on Jun 01, 2010
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