P1553 P1553 OBD Code Definition: P1553 Idle Speed Act.(Close) – Open P1553 OBD Code Description: OBD Code P1553 Idle Speed Act.(Close) – Open OBD Code P1553 Idle Air Control Valve Opening Coil High Voltage OBD Code P1553 Fuel injector No.3 range/performance malfunction OBD Code P1553 Barometric/manifold pressure signal ratio out of range