B1648 Trouble Code

View B1648 obd/2 error code description and symptoms. B1648 engine photo

The Transmission Fluid Pressure Switch allows the engine's control module (PCM) or Transmission Control Module (TCM) to use hydraulic fluid to engage the clutches in the transmission to allow for smoother shifting while driving. If the PCM or TCM detects an issue with the hydraulic clutch or the pressure switch, the PCM or TCM will set code B1648

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.

B1648 Error Code Repair Process :

OBD B1648 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 b1648 seat driver recline forward circuit open, 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 B1648 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 B1648 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.

B1648 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.

Common Causes of B1648

A common cause of code B1648 is the failure of B1648 Seat Driver Recline Forward Circuit Open, but there are several other possible causes as well, such as ;

Continuous oil flow to the VCT piston chamber
Clogged or faulty fuel injector (s)
Faulty variable valve timing (VVT)
Variable Camshaft Timing (VCT) position circuit is open or shorted

B1648 code for all cars

You can view according B1648 DTC for your car model. We selected several models to see obd2 solutions click and view it.

+B1648 Mercedes Clk 500

+B1648 Mg Rv15

+B1648 Chrysler Dodge

+B1648 Jowett 9

+B1648 Lincoln Capri

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

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