U251A Volvo Duett DTC Code

Volvo Duett Engine Specifications:

Engine Type :	Multi-Cylinder Engine
Cylinder Type :	V-Type Engine
Engine Air Intake Process :	Turbocharged Engine

Your Volvo Duett engine control system detects a problem, the computer stores the diagnostic trouble code U251A in its memory. To figure out what is wrong with your vehicle you must first extract the U251A DTC For Volvo Duett.

U251A Volvo Duett engine problem can be occur defective fan clutches are a common and often overlooked cause of engine overheating. The shear characteristics of the clutch fluid gradually deteriorates over time, with an average loss in drive efficiency of about 200 rpm per year. Eventually slippage reaches the point where effective cooling is no longer possible and overheating results. (On average, the life of a fan clutch is about the same as a water pump. If one needs to be replaced, the other usually does too.)

U251A Volvo Duett DTC Meaning

U	Network Code - Problem is climate control system, lighting, airbags, etc.
2	MFG - Manufacturer Specific
5	Auxiliary Emission Controls
1	IC Circuit High Voltage
A	TFP Valve Position Switch-Drive Without Drive Ratio

The original multi-displacement system turned off opposite pairs of cylinders, allowing the engine to have three different configurations and displacements. U251A Volvo Duett code had an elaborate diagnostics procedure, including showing engine trouble codes on the air conditionning display. However, the system was troublesome, misunderstood by customers, and a rash of unpredictable failures led to the technology being quickly retired.