Auto Repair Questions - Free Help - Expert Mechanics

Today's auto repair industry requires more electrical equipment, training and know how to diagnose car problems than ever before. Here on this website you will find free car and truck repair help, questions answered, advice, pictures and videos.


Have you had the experience of a mechanic replaced a part, did not fix the car, then guessed at another item. Maybe you read some free repair help online? When that did not repair the car, the usual response is:  "Well, gonna have to take it to the dealer".

THAT'S WHERE WE COME IN.

We have been ASE Certified Dealership Technicians for over 20 years each.

The day to day job of auto repair has become more difficult. Our customers seem to understand that most car repairs cannot be done by the backyard mechanic anymore.

Find your vehicle make from the menu at the top of this page to browse our articles.

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Thank you to our friends at The Transmission Repair Shop - Dallas for their help on this website.

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How Things Work

Radio Unlock Codes- Stereo Shows LOC or INOP

Does Your GM Radio Display Show LOC or INOP? Did you disconnect or replace your battery or radio and now the theft system is activated? Don't pay the Dealer up to $100 to unlock your stereo ?

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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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