What's Wrong With My Car or Truck- Free Auto Help

Here you can find answers to a specific problem you may be having with your car or truck.

Read articles that explain some common causes for problems in the areas listed below.

This list is always being added to, so check back again.

 

Subcategories

  • Vehicle Won't Start or Engine Noises

    Read articles related to common problems why your car or truck wont start. This section also explains some common engine noises and there possible causes.

  • Brakes Make Noise or Won't Stop Properly

    Descriptions of some common causes for brakes noises and poor braking performance.

  • Steering Problems

    Read about some of the common causes for regular or electric steering problems.

  • Front or Rear Suspension Problems

    Have a suspension problem on your car or truck? Read articles to help diagnose a problem.

  • Warning Light on the Dash. What Does it Mean?

    Today's cars and trucks have many lights that can come on the dash to warn the driver of a problem in a particular system. Many times when multiple lights are on, these can be related to the same problem.

    Computers "TALK" to each other. So, a problem in one system can affect one or more other systems. Sometimes this will cause a system to be dissabled and the warning light to come on, even though that system does not have a probem.

    A good example of this is that a problem in the ABS will usually cause the Traction Control to be dissabled. You may have an indicator that shows "TRAC Off". That does not neccesarily mean there is a fault in the Traction control function.

    Does your car or truck have a warning light or indicator on the dash. Find out what these lights mean, what to do next, possible causes and solutions.

  • Heater and A/C Problems

    Does your air conditioning blow warm? Does the heater stay cold? Is the drivers side dash vent temperature different from the passenger side temperature on A/C or heat? Read these articles.


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How Things Work

Charging System Components and Operation

On today's newer cars and trucks, the generator (ALternator) provides DC voltage to operate the vehicle's electrical system and to charge the battery. A magnetic field is created when current flows through the rotor windings. The rotor is belt driven by the engine creating an AC voltage as this field rotates within the stator windings.

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Common Engine Codes

Evaporative Emissions Leak Code P0440 - P0455

P0440 - P0455
The control module tests the evaporative emission (EVAP) system for a large leak. The control module monitors the fuel tank pressure (FTP) sensor signal to determine the EVAP system vacuum level. When the conditions for running are met, the control module commands the EVAP canister purge valve OPEN and the EVAP vent valve CLOSED .

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