P1670 - FAULT CODE - OBD2

P1670 FORD: ELECTRONIC FEEDBACK SIGNAL NOT DETECTED

With feedback, the actual output of a system is compared to the desired output, and consequently, an adjustment is made to the actual output so that an expected final result can be produced. In the case of the IDM (Injector Driver Module), the device in charge of the fuel injection system, provides the PCM (Powertrain Control Module) with the EF (Electronic Feedback) output signal, in order to confirm that the correct timing/duration of the Fuel Delivery Command Signal (FDCS) was received. The EF signal is also used to send diagnostics to the Injector Controller Module and the electrical injectors to the PCM.

The P1670 OBDII fault code is set on Ford brand vehicles when the Electronic Feedback Signal has not been received at the proper time or is not detected at all. This condition occurs because the communication between the PCM and IDM does not exist.

• Check Engine Lamp on.
• The engine has a general malfunction.

P1670 OBD2 diagnostic code is set for one of the following reasons:

• A fuse may be open.
• The IDM relay may be faulty.
• Wires from the Injector Driver Module may be damaged.
• The enable circuit or power supply circuits of the Injector Driver Module may be open or shorted.
• FDCS signal circuit may be shorted.
• The IDM may be in poor condition.
• The PCM may be damaged.

The steps to follow to troubleshoot the DTC P1670 OBDII code are as follows:

• Consult the Technical Service Bulletins.
• Check all the wiring of the Injector Driver Module and verify that it is not damaged by burns or other conditions. If deficiencies are found, make corrections as necessary.
• Check the IDM relay and fuses for proper condition. If you detect faults in one of the above-mentioned components, proceed with the necessary corrections.
• Following the steps indicated by the manufacturer, perform electrical checks to the enable circuit and power supply circuits of the Injector Controller Module. If after performing these tests you discover an open or shorted circuit, make the appropriate repairs.
• If even after performing the above-mentioned checks you still get the P1670 code, it is very likely that the Injector Driver Module is defective and you should visit an advanced automotive center.