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Posted on Jan 02, 2017
code is P0449
The PCM has determined that a malfunction exists in the electrical circuit for the vent valve/solenoid in the evaporative emission control system.
EVAP (Evaporative Emission System) purge/vent solenoid circuit condition
The solenoids and system wiring are monitored for opens or shorts
1- Purge or vent solenoids defective
2- Check connevtor and wiring
3- Fuel saturated vapor canister
4- Failed EVAP vent solenoid
A code P0141 may mean that one or more of the following has happened:
Posted on Feb 16, 2010
Have the transmiision serviced with new fluid and a filter. Also do a OBD2 ele ctronic system control fault code test with a scanner or code reader.
Posted on Oct 30, 2012
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Dec 07, 2016 | 2001 Cadillac DeVille
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The CTD system requests the IPC to illuminate the indicator only when the ignition switch is OFF. The CTD system uses the indicator in order to identify system status. For specific CTD condition that will illuminate the security indicator, refer to Content Theft Deterrent (CTD) Description and Operation .
The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 3 seconds.
SERVICE THEFT SYSTEM The radio illuminates the SERVICE THEFT SYSTEM message when the VTD system detects a failure. The radio receives a message from the theft deterrent control module via the serial data circuit requesting illumination.
This is one you need to take to the dealer , unless you have a GM factory scan tool !
Nov 21, 2015 | 2004 Cadillac CTS
Sep 17, 2015 | Cars & Trucks
This DTC only sets if DTC U1300 or U1301 are not current
Attempt to establish communication with all of the modules using a scan tool.
Does the scan tool communicate with all of the modules?
Go to Step 3
Go to the appropriate diagnostic system check for the module that is not communicating
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