Your Rover P6 engine control system detects a problem, the computer stores the diagnostic trouble
code C3968 in its memory.
To figure out what is wrong with your vehicle you must first extract the C3968 DTC For Rover P6.
On 1999 and later C3968 Rover P6 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.
C3968 Rover P6 DTC Meaning
Chassis Code - Problem is controller area network wiring bus and modules.
SAE - Generic
Vehicle Speed Output Circuit
Park/Neutral Postion (PNP) Switch Circuit Engine Torque Signal Circuit
If your C3968 Rover P6 check engine light is illuminated, it's best to take it in for diagnostic testing, which can feel like a hassle. Because while the lights vary in appearance from vehicle to vehicle, all have the same basic meaning: There's a problem with the car's emissions system. The on-board diagnostics system C3968 and engine control unit are in charge of monitoring a bunch of different C3968 DTC For Rover P6, and if they get a reading that's a little out of whack, up pops the check engine light.