B0646 Pontiac Grandam DTC Code

Pontiac Grandam Engine Specifications:

Engine Type :	Single Cylinder Engine
Cylinder Type :	Opposite Piston Engine
Engine Air Intake Process :	Turbocharged Engine

Your Pontiac Grandam engine control system detects a problem, the computer stores the diagnostic trouble code B0646 in its memory. To figure out what is wrong with your vehicle you must first extract the B0646 DTC For Pontiac Grandam.

B0646 Pontiac Grandam 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.)

B0646 Pontiac Grandam DTC Meaning

B	Body Code - Problem is antilock brake system, electronic suspension and steering systems.
0	SAE - Generic
6	Vehicle Speed Control And Idle Control System
4	Control Module Throttle Actuator Position Performance
6	Transmission Control Module Reprogrammable Memory

If your vehicle failed a B0646 Pontiac Grandam test and the B0646 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 B0646 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 B0646 DTC For Pontiac Grandam: Any conditions that might cause ignition misfire, an overly rich or lean fuel condition, or loss of compression.