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P1316 – What Does It Mean and How To Fix It

This is one of the most frequent OBD2 trouble codes. Read the full article below to know what it means, how to fix it, and what other codes may show related to it.

Definition

P1316 is an OBD-II Code that refers to Injector Driver Module Codes Detected

Meaning

A P1316 code is a manufacturer specific diagnostic trouble code that occurs in Ford and related makes and vehicles when the ECM/PCM detects a problem with the Injector Driver Module. The Injector Driver Module (IDM) transmits an EF output signal to the Powertrain Control Module (PCM) to verify that the correct timing/duration of the Fuel Delivery Command Signal (FDCS) was received. EF also transmits data on injector diagnostics and electrical systems to the PCM.

The P1316 Diagnostic trouble code indicates that codes are kept in the IDM. The specific problem that is being detected will vary depending on the manufacturer, but typically this code is set when the ECM/PCM detects a problem with either the voltage or ground circuits to the injector driver module.

Causes

Common causes for this code include:

  • Faulty Injector Driver Module (IDM) Relay
  • Malfunctioning Injector Driver Module
  • Injector Driver Module harness is open or shorted
  • Poor electrical connection to Injector Driver Module circuit 
  • Bad Powertrain Control Module (PCM)

Symptoms

The symptoms of a P1316 code are:

Diagnosis

To diagnose a P1316 DTC code, a technician would:

  1. Scan for codes in the ECM and look at the freeze frame data for failure.
  2. Visually inspect all related wiring and connectors.
  3. Perform a test of the Injector Driver Module to check output signals.
  4. Check voltages at the Injector Driver Module connectors.
  5. Clear codes and test-drive the vehicle to see if the code returns.
  6. If no other injector-related trouble codes are present, replace the Injector Driver Module.

Common mistakes

The following are some of the most common mistakes that a technician may make when diagnosing a P1316 code:

  • Not thoroughly inspecting all the wiring and connectors for damage
  • Not replacing a faulty Injector Driver Module
  • Not properly diagnosing other injector-related trouble codes

How serious is this?

A P1316 code is a fairly serious code that can cause the engine to run very poorly, or not start at all. If the engine is running when this code is present, it is important to drive the vehicle as little as possible in order to avoid further damage.

What repairs can fix the code?

The following are solutions that may fix this problem:

Related codes

A P1316 is related to and may be accompanied by the following codes:

P0087 – Fuel Rail/System Pressure Too Low

P0010 – “A” Camshaft Position Actuator Circuit (Bank 1)

P0011 – “A” Camshaft Position – Timing Over-Advanced or System Performance (Bank 1)

Conclusion

In conclusion, the P1316 code is a diagnostic trouble code that refers to a problem with the Injector Driver Module. This code is set when the ECM/PCM detects a problem with either the voltage or ground circuits to the injector driver module. This code is a serious code that can cause the engine to run very poorly, or not start at all. If you have this code, it is important to take your vehicle to a qualified technician as soon as possible in order to avoid further damage.