B3878 Buick Roadmaster DTC Code

Buick Roadmaster Engine Specifications:

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

Your Buick Roadmaster engine control system detects a problem, the computer stores the diagnostic trouble code B3878 in its memory. To figure out what is wrong with your vehicle you must first extract the B3878 DTC For Buick Roadmaster.

A good ground connection is also extremely important. B3878 Buick Roadmaster engine problem because the presence of voltage at the panel harness won't make the panel work if there is a bad ground connection. Since the instrument cluster is mounted in a plastic dash, a separate ground wire or ground circuit through the wiring harness is usually needed to complete the power circuit. Refer again to the wiring diagram to find the ground path, and then check it with your ohmmeter. Do not use a self-powered test light because it cannot measure resistance (any resistance will lower circuit voltage).

B3878 Buick Roadmaster 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
8	Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit

OBD B3878 Buick Roadmaster 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 B3878, 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 B3878 DTC For Buick Roadmaster 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 B3878 DTC For Buick Roadmaster 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.