Buick Car and SUV Repair Questions and Answers

Buick Motor Company was incorporated in 1903 in Flint Michigan.

It first sold cars in 1904. Buick soon became the largest

auto company in the U.S. After purchasing several other

automobile makers, the company became know as General Motors.


Buick vehicles.

Here is a list of auto repair questions and answers.

Click on your model to read the articles.

Subcategories

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How Things Work

Evaporative Emission System Operation and Components

The Evaporative Emission (EVAP) control system limits the fuel vapors from escaping into the atmosphere. The EVAP transfers the fuel vapors from the sealed fuel tank to an activated carbon (charcoal) storage device (EVAP canister). The EVAP canister stores the vapors until the engine is able to use the extra fuel vapor. When the engine is able to use the extra fuel vapor,

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Common Engine Codes

EGR Codes P0400 - P0405

P0400-P0405
The powertrain control module (PCM) tests the exhaust gas recirculation (EGR) system during deceleration by momentarily commanding the EGR valve to open while monitoring the manifold absolute pressure (MAP) sensor signal. When the EGR valve is opened, the PCM should see a proportional increase in MAP.

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