P1273 MAZDA Cylinder #3 High To Low Side Open

Possible causes

– Shorted injector circuit
– Faulty fuel injector
– Faulty fuel injector interface module

Symptoms

– Engine Light ON (or Service Engine Soon Warning Light)

P1273 MAZDA OBD Code Description

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