Fault code P1513

[Karpov]

Hello

I got this: P1513 Intake Manifold Changeover Valve2 circuit Short to B +


I have MY2000 Volvo v70 t5 automatic (mk2). This code has appeared couple times when car is idled at warm engine. It lights up triangle and car says service engine soon.

Car runs and works great. Fault code is odd to me and google. What can cause it? That changeover valve is weird to me