In order to change gears, solenoids like the low coast brake solenoid valve have to stop different parts from moving so the next gear ratio can be selected. A P1772 OBDII indicates that there is a problem with the Nissan LC/B Solenoid.
How Serious is the Code?
The P1772 Nissan diagnostic trouble code is very serious, and could lead to a number of transmission problems like failed shifts and erratic transmission behavior.
Symptoms of a P1772 include:
- Harsh shifts
- Failed shifts
- Erratic shifting
- Damage to the wiring and/or connectors along the transmission wiring harness
- Failed low coast brake solenoid valve
How to Diagnose the Code?
The first step to diagnosing a P1772 OBD2 code is to inspect the wiring and connectors along the transmission wiring harness. If no damaged wires or loose ground connections are found, then the low coast brake solenoid valve will have to be checked using a OBDII scan tool.
What Repairs Will Fix P1772?
- Replace damaged wiring and/or connectors
- Replace low coast brake solenoid valve