B3874 Buick 6 DTC Code | EngineDTC.com

Buick 6 Engine Specifications:

Engine Type :	Single Cylinder Engine
Cylinder Type :	Opposite Piston Engine
Engine Air Intake Process :	Naturally Aspirated

Your Buick 6 engine control system detects a problem, the computer stores the diagnostic trouble code B3874 in its memory. To figure out what is wrong with your vehicle you must first extract the B3874 DTC For Buick 6.

B3874 Buick 6 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.)

B3874 Buick 6 DTC Meaning

B	Body Code - Problem is antilock brake system, electronic suspension and steering systems.
3	SAE - Generic
8	Accelerator Pedal Position (APP) Sensor 1 Performance
7	Exhaust Gas Recirculation System Valve 1
4	Cruise Vehicle Speed/Set Speed Difference Too High

If your vehicle failed a B3874 Buick 6 test and the B3874 Check Engine Light is NOT on, chances are you have a problem with the OBDII system, a burned out MIL lamp, or a faulty catalytic converter. The converter is essentially an afterburner that cleans up the exhaust after it exits the engine. The OBDII system uses B3874 a ownstream oxygen sensor to monitor the efficiency of the converter, and it should detect a drop in converter efficiency if the converter has been contaminated or is failing (ignition misfiring, leaky exhaust valves, and oil burning can all damage the converter). What you want to look B3874 DTC For Buick 6: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.