DTC P0230: Fuel Pump Primary Circuit [06/2016 - 08/2019]: Description

When a malfunction in the fuel pump control circuit (low pressure side) is detected, DTC P0230 is stored.

The fuel pump control circuit (low pressure side) consists of the ECM, fuel pump assembly and fuel pump control ECU (which operates the fuel pump assembly). Based on the engine output, the ECM determines the fuel pump speed. The speed is then converted to a duty signal and sent to the fuel pump control ECU. Based on the signal sent from the ECM, the fuel pump control ECU adjusts the fuel pump assembly operation speed among 3 settings. The fuel pump control ECU also has a self-diagnosis function. Based on the fuel pump control circuit (low pressure side) condition, the fuel pump control ECU outputs a diagnostic signal to the ECM, and the ECM determines if there is a malfunction in the fuel pump control circuit (low pressure side).