P1316 Code 7.3 Powerstroke Symptoms, Causes, and Solutions

The P1316 code is one of the most dreaded diagnostic trouble codes (DTCs) that can appear on a 7.3 Powerstroke diesel engine. This code is associated with the Powertrain Control Module (PCM) and can indicate serious issues within the engine’s electrical system. In this article, we’ll explore the p1316 code 7.3 Powerstroke symptoms, causes, and solutions of the issue.

p1316 code 7.3 powerstroke

P1316 Code 7.3 Powerstroke Symptoms

When P1316 is triggered in your 7.3 Powerstroke, you may experience a range of symptoms that indicate potential problems with your engine. Here are some common signs associated with this code:

1. Check Engine Light:

The most noticeable symptom is the illumination of the check engine light on your dashboard. This is often the first sign that something is inappropriate with your engine.

2. Engine Misfire:

You may notice that your engine is running roughly, with noticeable misfires. This can result in a loss of power and a rough idle, making the vehicle unpleasant to drive.

3. Reduced Fuel Efficiency:

A P1316 code can lead to decreased fuel efficiency, as the engine may not be running optimally. You might find yourself making more frequent trips to the gas station.

4. Hard Starting:

Difficulty starting the engine can also be a symptom. Your 7.3 ford may struggle to turn over or take longer to start than usual.

5. Stalling:

In some cases, you may face P1316 code 7.3 Powerstroke no start and the engine may stall unexpectedly, which can be dangerous, especially in traffic or at high speeds.

Causes of P1316 Code in 7.3 Powerstroke

The p1316 code ford powerstroke is specifically related to injector circuit IDM (Injector Driver Module). It indicates that there is an issue with the communication between the PCM (Powertrain Control Module) and the IDM, which can lead to misfires and other engine performance problems. Here are some of the common causes of the p1316 ford code:

  1. Faulty Injector Driver Module: A malfunctioning IDM is one of the primary causes of the code p1316. The IDM is responsible for controlling the timing and firing of the fuel injectors. If it fails or experiences an internal fault, it can disrupt the communication between the PCM and the injectors, resulting in misfires and the ford P1316.
  2. Wiring Issues: Damaged or corroded wiring harnesses and connectors in the IDM circuit can lead to poor electrical connections or shorts. These issues can prevent proper communication between the IDM and the PCM, triggering the DTC code P1316 ford.
  3. Injector Problems: Failing or damaged fuel injectors can also trigger the P1316 code. When an injector fails to function correctly, it can create electrical issues in the circuit, causing misfires and communication problems.
  4. Faulty Powertrain Control Module: In rare cases, a problem with the PCM itself can lead to the P1316 ford 7.3. However, issues with the IDM or wiring are more common culprits. Before considering the PCM as the cause, it’s essential to rule out other potential issues.
  5. Poor Grounds: Ground connections play a crucial role in the operation of the IDM and the injectors. If there are poor or corroded ground connections in the circuit, it can affect the performance of the IDM and cause communication problems.
  6. IDM Relay Issues: The IDM relies on a relay to supply power. If the relay is faulty or has poor connections, it can result in issues with the IDM and trigger the P1316 ford code.
  7. Low Battery Voltage: Insufficient voltage can also cause the P1316. Low battery voltage can disrupt the communication between the PCM and the IDM, leading to misfires and performance problems.
  8. Software or Firmware Issues: In some cases, updating or reprogramming the PCM may be necessary if there are software or firmware issues causing communication problems.

It’s important to note that diagnosing the exact cause of the P1316 code can be challenging, and it often requires a systematic approach, including thorough inspection of wiring, connectors, and components.

What Causes a 7.3 Powerstroke to Misfire?

 A 7.3 powerstroke misfire can occur due to various factors. Common causes include malfunctioning or clogged fuel injectors, faulty glow plugs, insufficient fuel delivery due to issues like a failing fuel pump or clogged fuel filter, electrical problems such as sensor failures or wiring issues, air intake obstructions like a clogged air filter or malfunctioning Mass Air Flow (MAF) sensor, exhaust restrictions, low cylinder compression caused by worn piston rings or head gasket problems, and timing issues due to a malfunctioning timing belt or chain. Proper diagnosis and repair are crucial to address the specific cause of the car misfire and restore the engine’s performance.

How to Fix P1316 Code?

Resolving the P1316 ford requires a systematic approach to diagnose and fix the underlying issues. Here are the steps to take when faced with this code:

1. Check Wiring and Connectors:

  • Inspect the wiring harnesses and connectors in the IDM circuit for damage, corrosion, or loose connections.
  • Repair or replace any damaged or corroded wiring and connectors as needed. Ensure that all connections are secure.

2. Test IDM (Injector Driver Module):

  • Test the IDM to ensure it is functioning correctly. You may need access to specialized diagnostic equipment for this.
  • If the IDM is found to be faulty, replace it with a new or rebuilt unit.

3. Inspect Fuel Injectors:

  • Have the fuel injectors inspected and tested to verify they are in good working condition.
  • Replace any faulty injectors if they are found to be the cause of the communication issues.

4. Check IDM Relay:

  • Verify the functionality of the IDM relay, as a faulty relay can disrupt power to the IDM.
  • Replace the relay if it is found to be faulty or if there are issues with its connections.

5. Test Battery Voltage:

  • Ensure that the battery voltage is within the appropriate range. Low battery voltage can cause communication problems.
  • Charge or replace the battery if it is weak or not holding a sufficient charge.

6. Reprogram Powertrain Control Module:

  • In some cases, issues with the PCM’s software or firmware may be causing communication problems.
  • Check if there are any available updates or reprogramming options for the PCM and perform the update as needed.

7. Clear Codes and Reset PC

  • After making necessary repairs, clear P1316 using a diagnostic scanner.
  • Reset the PCM to ensure it recognizes the corrected conditions.

8. Monitor Performance:

  • After clearing the code and performing repairs, monitor your 7.3 Powerstroke’s performance for a few drive cycles to ensure the issue has been resolved.
  • Pay close attention to any signs of misfires, rough idling, or performance problems, and address them promptly if they reoccur.
Fixing P1316 YouTube

It’s important to remember that diagnosing and fixing the ford P1316 can be complex, and it may require specialized equipment and technical expertise. If you’re not comfortable with these procedures or if the issue persists after attempting these solutions, it’s advisable to seek professional assistance from a qualified mechanic with experience in diagnosing and repairing ford engines.


The P1316 code in a 7.3 Powerstroke engine is a sign that something is amiss with the IDM, wiring, injectors, or possibly the PCM. While it can be a challenging code to diagnose and repair, addressing it promptly is crucial to prevent further engine damage and restore your vehicle’s optimal performance. If you’re not comfortable diagnosing and repairing the issue yourself, it’s advisable to seek professional assistance from a qualified mechanic who specializes in diesel engines to ensure your 7.3 Powerstroke continues to run smoothly.


Mr. Shafiqule Islam is a graduated Mechanical Engineer and has more than 15 years experience of repairing and maintenance of different brand vehicles like Toyota, Mitsubishi, Ford, Mercedes, BMW etc. He is also giving training to Mechanics. He has started writing to share his practical knowledge to Vehicle Owners, Drivers and Mechanics to keep their cars at best fit.

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