U2986 Audi 100 DTC Code | EngineDTC.com

Audi 100 Engine Specifications:

Engine Type :	Multi-Cylinder Engine
Cylinder Type :	In-Line Engine
Engine Air Intake Process :	Supercharged Engine

Your Audi 100 engine control system detects a problem, the computer stores the diagnostic trouble code U2986 in its memory. To figure out what is wrong with your vehicle you must first extract the U2986 DTC For Audi 100.

Another consequence of U2986 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.

U2986 Audi 100 DTC Meaning

U	Network Code - Problem is climate control system, lighting, airbags, etc.
2	MFG - Manufacturer Specific
9	Transmission
8	Crankshaft Position Sensor Circuit Performance
6	Transmission Control Module Reprogrammable Memory

OBD U2986 Audi 100 code and tailpipe testing are two different approaches to identify vehicles in need of repair. The OBD system looks for broken or malfunctioning emissions control components and U2986, while tailpipe tests sample a vehicle's exhaust to see if it is above or below certain prescribed limits. Given the robust nature of today's emissions control components, it is entirely possible for an individual component to U2986 DTC For Audi 100 malfunction without leading to an immediate increase in emissions at the tailpipe. In such cases, other components (like the catalyst) can temporarily compensate for the part that is broken however, these other components can only do double duty for so long before they, too, begin to malfunction. In addition, OBD also monitors for U2986 DTC For Audi 100 and other malfunctions in the fuel system problems that traditional tailpipe tests were not designed to identify. Most state and local areas also include a gas cap pressure test as part of an emission inspection.