A weak or failing battery might indirectly contribute to this error code in some circumstances. As the crankshaft position sensor and many other engine sensors require a stable voltage supply, a weak battery can cause fluctuations or drops in the voltage supplied to these sensors. Additionally, a bad battery can create electrical noise or interference, which might disrupt the signals from various sensors as well as a weak battery might cause the Engine Control Module (ECM) to reset or malfunction, which can lead to various diagnostic trouble codes, including P0335.