Pontiac Automotive Repair Questions

Pontiac Cars and SUV's.

Here is a list of auto repair questions and answers.

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Articles being added all the time.

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How Things Work

Engine Coolant System | Water Pump Radiator Thermostat Heater Core

The cooling system's function is to maintain an efficient engine operating temperature during all engine speeds and operating conditions. The cooling system is designed to remove approximately one-third of the heat produced by the burning of the air-fuel mixture. When the engine is cold, the system cools slowly or not at all. This allows the engine to warm quickly.

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Common Engine Codes

Oxygen Sensor Code P0036 and P0056

P0036 - P0056
Heated oxygen sensors (HO2S) are used for fuel control and post catalyst monitoring. Each HO2S compares the oxygen content of the surrounding air with the oxygen content in the exhaust stream. The HO2S must reach operating temperature to provide an accurate voltage signal. A heating element inside the HO2S minimizes the time required for the sensor to reach operating temperature.

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