What is fuel pump secondary circuit failure?
What is fuel pump secondary circuit failure? Code P0232 is triggered when voltage in the fuel pump secondary circuit is shorted to vehicle power through the relay. The ECM monitors this voltage to see if it stays on after the key is turned off. The most common failure is a relay stuck to the On position internally. What does error code p1237 mean on a fuel pump? Error code P1237 is usually quite easy to diagnose. Because it relates to fuel pump circuit, technicians start their diagnosis by checking the fuse and pump relay. If both are good, then the...