What is the p1235 code?

The P1235 code is a diagnostic trouble code (DTC) indicating a problem with the fuel pump relay control circuit in vehicles, particularly from certain manufacturers like Nissan. This code typically suggests that the Engine Control Module (ECM) is not receiving the expected signal from the fuel pump relay, which may lead to issues such as poor engine performance or starting difficulties. Troubleshooting often involves inspecting the fuel pump relay, wiring, and the ECM for faults.