U257A Pontiac Silver Streak DTC Code

Pontiac Silver Streak Engine Specifications:

Engine Type :	Multi-Cylinder Engine
Cylinder Type :	W-Type Engine
Engine Air Intake Process :	Naturally Aspirated

Your Pontiac Silver Streak engine control system detects a problem, the computer stores the diagnostic trouble code U257A in its memory. To figure out what is wrong with your vehicle you must first extract the U257A DTC For Pontiac Silver Streak.

Another consequence of U257A Pontiac Silver Streak engine overheating may be a blown head gasket. Heat makes aluminum swell almost three times faster than cast iron. Thermal stress can distort the head and make it swell in areas that are hottest like those between exhaust valves in adjoining cylinders, and areas that have restricted coolant flow like the narrow area that separates the cylinders. The typical aluminum head swells most in the middle, which can crush the head gasket if the head gets too hot. This will usually cause the head gasket to leak compression between adjacent cylinders, or leak coolant into the cylinders.

U257A Pontiac Silver Streak DTC Meaning

U	Network Code - Problem is climate control system, lighting, airbags, etc.
2	MFG - Manufacturer Specific
5	Auxiliary Emission Controls
7	Exhaust Gas Recirculation System Valve 1
A	TFP Valve Position Switch-Drive Without Drive Ratio

There are currently two main types of cylinder deactivation used today, depending on the type of engine. U257A Pontiac Silver Streak code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed.