Your Bentley State engine control system detects a problem, the computer stores the diagnostic trouble
code B1D5B in its memory.
To figure out what is wrong with your vehicle you must first extract the B1D5B DTC For Bentley State.
On 1999 and later B1D5B Bentley State engines, the instrument cluster has a built-in self-diagnostic mode that can be accessed by pressing and holding the instrument cluster SELECT/RESET button. Insert the ignition key and turn to the RUN position (but don't crank or start engine). Continue to press and hold the SELECT/RESET button (for 5 seconds) until the word TEST is displayed by the odometer. Release the SELECT/RESET button within three seconds after the word TEST is displayed to begin the self-diagnostic mode.
B1D5B Bentley State DTC Meaning
Body Code - Problem is antilock brake system, electronic suspension and steering systems.
MFG - Manufacturer Specific
BBV Sensor Circuit Low Voltage
TFP Valve Position Switch-Drive Without Drive Ratio
There are currently two main types of cylinder deactivation used today, depending on the type of engine. B1D5B Bentley State code for the pushrod design which uses solenoids to alter the oil pressure delivered to the lifters. In their collapsed state, the lifters are unable to elevate their companion pushrods under the valve rocker arms, resulting in valves that cannot be actuated and remain closed.