Question about 2005 Pontiac Grand Prix
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Posted on Jan 02, 2017
SOURCE: diagram on a pontiac grand prix
GM Century/Lumina/Grand Prix/Intrigue 1997-2000
The vehicles covered by this guide use one of two types of ignition switches:
Instrument Panel-Mounted Ignition Switch
WARNING You must perform the Body Control Module (BCM) theft deterrent relearn procedure after replacement of the ignition lock cylinder. Failure to perform this relearn procedure means the BCM will not function properly. This means the vehicle will not be theft protected by the Passlock system and the engine may not crank or start. GM recommends that this procedure be performed with their Tech 2® or equivalent scan tool. An alternate relearn procedure is given at the end of this procedure.
This procedure takes approximately 30 minutes. Make sure the battery is fully charged before proceeding.
Posted on Sep 09, 2008
Check for power and ground at the break, transmission, interlock switch located at the gear shift - if you have power and ground interlock is faulty - replace interlock switch. If no power and ground - check circuit continuity.
Posted on Aug 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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well does the key go in does it turn to the start pos? if the dash dost power up its because the switch is bad if it will power up but not start it can be becuse of the resitor chip depends on what is going on if you cant get power its becuse of the switch
Posted on May 09, 2010
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