U2979 Audi 100 DTC Code | EngineDTC.com

Audi 100 Engine Specifications:

Engine Type :	Single Cylinder Engine
Cylinder Type :	V-Type Engine
Engine Air Intake Process :	Naturally Aspirated

Your Audi 100 engine control system detects a problem, the computer stores the diagnostic trouble code U2979 in its memory. To figure out what is wrong with your vehicle you must first extract the U2979 DTC For Audi 100.

Another consequence of U2979 Audi 100 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.

U2979 Audi 100 DTC Meaning

U	Network Code - Problem is climate control system, lighting, airbags, etc.
2	MFG - Manufacturer Specific
9	Transmission
7	Exhaust Gas Recirculation System Valve 1
9	A/C System High Pressure High Temperature

The rule of U2979 Audi 100 code when it comes to emissions-related vehicle repair is that any modification that changes the vehicle from a certified configuration to a non-certified configuration is considered tampering: this applies to both vehicle owners and repair facilities and is, therefore, a Federal offense. Replacing a catalyst with a straight pipe is one traditional example of U2979. Likewise, overriding the OBD U2979 DTC For Audi 100 system through the use of high-tech defeat devices or non-certified computer chips, for example, would also be considered tampering. The OBD system may, however, be repaired back to its original certified configuration with certified performance chips or appropriate aftermarket parts.