B279F Mercury Comet OBD Code

OBD/2 B279F error code description and symptoms.

The issue covered by the bulletin involves a power steering noise/whine or fluid leak from the power steering pump, gear or high pressure side power steering hose during extreme low outdoor temperature operation.

One example of this would be when an automatic vehicle in placed in gear. To prevent the added drag from the torque converter and transmission from reducing the idling speed, the PCM will command the idle control valve to allow more air to enter the engine, while at the same time, adjusting the injector pulse width to inject more fuel to suit the increased amount of air. Note that the idle air control valve is closed by the PCM when the throttle plate is opened to prevent excess air from entering the engine.

B279F Mercury Comet Error Code Repair Process :

OBD B279F 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 injection pump fuel metering control a intermittent (cam/rotor/injector), 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 B279F 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 B279F 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.

Common Causes of Mercury Comet B279F OBD2 Code

A common cause of code B279F is the failure of Injection Pump Fuel Metering Control A Intermittent (Cam/Rotor/Injector), but there are several other possible causes as well, such as ;

Exhaust gas leaks
Engine Control Module (ECM)
Insufficient cylinders compression
Oil flow restriction in the oil passages or the variable camshaft timing (VCT) valve body

B279F is a kind of Body Trouble Code

Auto body problems aren't always easy to spot. Diagnosing auto body problems sometimes requires a little know-how. In this section you'll find articles dedicated to teaching you how to diagnose auto body problems.

Engine OBD 2 Codes website is a freeware resource center for engine trouble codes.

About Us | Contact | Privacy

B279F Mercury Comet OBD Code

B279F Mercury Comet Error Code Repair Process :

Common Causes of Mercury Comet B279F OBD2 Code

B279F code for other Mercury cars