Error Code P1316: Symptoms, Causes, and Diagnostic Cost
Important Note:
The list of causes mentioned below is not exhaustive. Other failures may also be responsible for the appearance of code P1316.
What are the possible causes of code P1316?
The DTC (Diagnostic Trouble Code) P1316 is generally related to a malfunction in the injector driver module system. Here are the most common causes:
- Faulty Injector Driver Module (IDM) relay.
- IDM module itself failing.
- Damaged, cut, or short-circuited wiring harness connecting the IDM.
- Faulty electrical connection in the injector control circuit.
- Failing Powertrain Control Module (PCM).
How much does a diagnosis for code P1316 cost?
Diagnosing this code typically requires about 1 hour of labor. However, this time may vary depending on several factors, such as:
- The region you are in,
- The make and model of the vehicle,
- The type of engine installed.
What are the symptoms associated with code P1316?
Here are the most common signs associated with this code:
- Illumination of the Check Engine light,
- Sometimes, the display of a warning message such as “Engine Maintenance Required Soon“.
What exactly does code P1316 mean?
Code P1316 indicates that error codes are stored in the Injector Driver Module (IDM).
This module sends an EF (Error Feedback) signal to the PCM (Powertrain Control Module) to confirm that the Fuel Distribution Control Signal (FDCS) has been properly received—respecting both the activation timing and its duration. This same EF signal is also used to transmit diagnostic information regarding the status of the IDM system and the injectors.