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

Windshield Wiper System Operation

The windshield wiper motor module is part of the windshield wiper motor cover and controls wiper motor operation. The accessory voltage supply circuit to the windshield wiper motor assembly is used to operate the wiper motor in all modes. The windshield wiper motor is a 2 speed motor and is operated at low speed in all modes except HIGH.

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Common Engine Codes

Throttle Position Sensor Code P0121, P0122 and P0123

The throttle position (TP) sensor is used by the powertrain control module (PCM) to determine the throttle plate angle for various engine management systems. The TP sensor is a potentiometer type sensor with three circuits: a 5-volt reference, a low reference, and a signal. The PCM provides the TP sensor with a 5-volt reference circuit and a low reference circuit.

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