20 Most Recent
Questions & Answers
2005 cobalt..back turn signals work, flashers work in the back, headlights work all around. Front flashers and turn signals come on, do not flash..help
Do you know anything about automotive electronic's ? BCM - body control modules ? DTC'S - diagnostic trouble codes ?
Turn Signal Lamps
The body control module (BCM) is responsible for controlling the turn signals and hazard lamps. When the turn signal switch is placed in either the left turn or right turn position, the BCM receives a signal from the turn signal switch. The BCM then sends an on-off voltage signal to either the left or right turn signals and their instrument panel cluster (IPC) indicator. When the hazard switch is pressed, the BCM receives a signal from the hazard switch. The BCM then will send an on-off voltage signal to all the turn signal lamps. All the turn signal lamps will flash including both IPC turn signal indicators.
Hooking up a professional type scan tool an checking for DTC'S in the BCM would be the first step in the diagnostic procedure .
on Apr 06, 2019
How to change headlamp bulb on a 2005 chevy cobalt
Its hard to fit your hand in the small space so best to remove the 2 bolts on top 10mm that are holding the headlight in place. The from the side, pull/pop the headlight assembly forward and out from behind the front grill area. Once its out, you can easily turn the retaining collar and remove the bulb. Be sure not to touch the glass of the new bulb or the oils from your fingers will create a hotspot and shorten the bulb life. Replace in reverse order.
on Mar 21, 2019
Have a 2005 cobalt chevy code U2105 says something is not communicating? Where could the issue be
• DTC U2105 Lost Communications With Engine Control System
Modules connected to the GMLAN serial data circuits monitor for serial data communications, during normal vehicle operation. Operating information and commands are exchanged among the modules. The modules have programmed information about what messages are needed to be exchanged on the serial data circuits, for each virtual network. The messages are also supervised and some periodic messages are used by the receiver module as an availability indication of the transmitter module. The supervision time-out period is 250 ms. Each message contains the identification number of the transmitter module. When a message that indicates the availability of the transmitter module is not received, the receiver module sets a DTC 21xx where xx is equal to the 2-digit identification number of the transmitter module.
The DTC descriptors listed below provide a method for determining which module is not communicating. A module with a GMLAN serial data circuit malfunction or which loses power during the current ignition cycle will have a Loss of Communication DTC set by other modules that depend on information from that failed module. The modules that can communicate will set a DTC indicating the module that cannot communicate.
Your best bet , take it to a qualified repair shop .
on Feb 23, 2019
The reduced engine power light
The check engine light being on now is a different problem , Have DTC'S - diagnostic trouble codes checked ,will have something to do with electronic throttle control . That is what reduced engine power is about . It's in a reduced power mode.
Reduced Engine Power Mode
When the ECM detects a condition with the TAC system, the ECM may enter a reduced engine power mode. Reduced engine power may cause one or more of the following conditions:
• Acceleration limiting--The ECM will continue to use the accelerator pedal for throttle control; however, the vehicle acceleration is limited.
• Limited throttle mode--The ECM will continue to use the accelerator pedal for throttle control; however, the maximum throttle opening is limited.
• Throttle default mode--The ECM will turn off the throttle actuator motor and the throttle will return to the spring loaded default position.
• Forced idle mode--The ECM will perform the following actions:
- Limit engine speed to idle by positioning the throttle position, or by controlling the fuel and spark if the throttle is turned off.
- Ignore the accelerator pedal input.
• Engine shutdown mode--The ECM will disable fuel and de-energize the throttle actuator.
Do you know what electronic throttle control is ?
Throttle Actuator Control (TAC) System Description
The throttle actuator control (TAC) system delivers improved throttle response and greater reliability and eliminates the need for mechanical cable. The TAC system performs the following functions:
• Accelerator pedal position sensing
• Throttle positioning to meet driver and engine demands
• Throttle position sensing
• Internal diagnostics
• Cruise control functions
• Manage TAC electrical power consumption
The TAC system includes the following components:
• The accelerator pedal position (APP) sensors
• The throttle body assembly
• The engine control module (ECM)
Your best bet , take it to a qualified repair shop .
on Dec 24, 2017
Power steering goes out
General Motors has decided that a defect, which relates to motor vehicle safety, exists in certain 2005-2010 model year Chevrolet Cobalt vehicles;
2005 model year Pontiac Pursuit; 2005-2006 model year Pontiac G4; 2006 model year Pontiac G5 Pursuit; and 2007-2010 model year Pontiac G5
vehicles equipped with electric power steering. Some of these vehicles have a condition in which a sudden loss of power steering assist could occur at
any time while driving the vehicle. If the power steering assist is lost, a chime will sound and a "Power Steering" message will be displayed in the
Driver Information Center to inform the driver of the condition. Steering control will be maintained, as the vehicle defaults to a manual steering mode.
If power steering assist is lost, it may require greater driver effort at low vehicle speeds, for example, below 15 mph (25 km/h). Unless a driver
compensates for this additional effort, it may increase the risk of a crash.
on Dec 17, 2017
Not finding what you are looking for?