Question about 2004 Pontiac Grand Prix
No air blows
May be low on 134a freon. The compressor cannot cycle without enough freon in the system. Buy a can at the store and add it to the system. if This does not work, have it serviced by a qualified a/c tech
Posted on Apr 23, 2013
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Posted on Jan 02, 2017
i have an Idea. first of all make sure that all of your vents are not plugged up. next check your heating coils to find out if only one side is hot or the other is only cold. i need more info
Posted on Jun 30, 2008
the air sensor yur thinking of is usually found out front of the car on the post that supports the hood latch betwween the radiator assemblies and the oute decorative grill. go to your auto parts store like autozone and ask for the ambient air temp sensor. then if they can, ask for a diagram of its location. Its real easy to replace usually one bolt and one wire clip. Autozone has /offers these do it yourself repar guides that can help you .
Posted on Jul 22, 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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