Possible causes

– Faulty Transmission Range (TR) sensor
– Transmission Range (TR) sensor harness is open or shorted
– Transmission Range (TR) sensor circuit poor electrical connection

Symptoms

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

P1702 FORD Description

The Engine Control Module (ECM) has detected a Transmission Range (TR) sensor signal indicating a reverse engagement error.

FORD Technical Service Bulletins for P1702 code