P1277 Code: Meaning, Causes, and Symptoms | OBD2 Codes

P1277 – Cylinder #7 High To Low Side Open

 

P1277 Possible Symptoms

 

Engine Light ON (or Service Engine Soon Warning Light)

 

P1277 Possible Causes

 

Faulty Fuel Injector,Faulty Fuel Injector Interface Module,Fuel Injector harness is open or shorted,Fuel Injector circuit poor electrical connection

 

P1277 Description

 

A fault is detected by the fuel injector interface module in the secondary (rearward) fuel injector circuit