yet another fault with my Audi a4 1.9 tdi started from cold in morning was OK after i drove it for like 30 seconds car went into limp mode and then in a Que car was shaking like mad looked like it was going to blow up.

i had shut the engine off and started it again like 3 times to get car out of limp mode.

anyone know what it could be i had car on computer before it shows error code.

17964 - Charge Pressure Control: Negative Deviation
P1556 - 35-10 - - - Intermittent

anyone know what the fault is..

thanks