P062B Internal Control Module Fuel Injector Control Performance (2023)

OBD-II Trouble Code Technical Description

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P062B Internal Control Module Fuel Injector Control Performance (1)
Stephen Darby
ASE Certified Technician

Internal Control Module Fuel Injector Control Performance

What does that mean?

This is a generic powertrain diagnostic trouble code (DTC) and typically applies to OBD-II vehicles. That may include but is not limited to vehicles from Ford, GMC, Chevy, Mercedes Benz, Buick, Land Rover, Mazda, Nissan, Citroen, Maserati, etc. Although generic, the exact repair steps may vary depending on year, make, model and powertrain configuration.

When a code P062B is stored, it means that the powertrain control module (PCM) has detected an internal performance error with the fuel injection control system. Other controllers may also detect an internal PCM performance error (in the fuel injection control system) and cause a P062B to be stored.

Internal control module monitoring processors are responsible for various controller self-test duties and overall internal control module accountability. Fuel injection control system input and output signals are subject to self-test and are monitored constantly by the PCM and other related controllers. The transmission control module (TCM), traction control module (TCSM), and other controllers are subject to interaction with the fuel injection control system.

Typically, the fuel injector controller is integrated into the PCM. At least one fuel injector per cylinder is used to deliver a precise amount of fuel to the cylinder at the exact instant it is required to maximize performance and efficiency.


You could think of each fuel injector as a type of solenoid that is opened or closed using battery voltage. When the ignition is ON, constant battery voltage is supplied to each fuel injector. To complete the circuit, and cause each fuel injector to spray a precise amount of fuel at the appropriate time, the PCM supplies an instantaneous ground pulse.

The PCM uses input signals from the crankshaft position (CKP) sensor, the camshaft position (CMP) sensor, the oxygen sensors, the mass airflow (MAF) sensor, and the throttle position (TPS) sensor to monitor fuel injector controller performance.

Whenever the ignition is on and the PCM is energized, fuel injection control system self-tests are initiated. In addition to running internal controller self-tests, the controller area network (CAN) also compares signals from each individual module to ensure that each controller is functioning properly. These tests are performed simultaneously.

If the PCM detects discrepancies in the internal fuel injector control system, a code P062B will be stored and a malfunction indicator lamp (MIL) may be illuminated. Additionally, if the PCM detects a discrepancy between any of the on-board controllers, which would indicate an internal fuel injector controller error, a code P062B will be stored and a malfunction indicator lamp (MIL) may be illuminated. Multiple failure cycles may be necessary for MIL illumination, depending upon the perceived severity of the malfunction.

Photo of a PCM with the cover removed:
P062B Internal Control Module Fuel Injector Control Performance (2)

What is the severity of this DTC?

Internal control module processor codes should be categorized as severe. A stored code P062B could result in serious drivability issues, suddenly and without warning.

(Video) Ford Galaxy 2.0 TDCI 2010 cutting out. P0605 P060C and P062B. Fault finding and repair.

What are some of the symptoms of the code?

Symptoms of a P062B trouble code may include:

  • Engine misfire
  • Excessively lean or rich exhaust
  • Hesitation upon acceleration
  • Misfire codes stored

What are some of the common causes of the code?

Causes for this P062B trouble code may include:

  • Open or shorted circuit or connectors in the CAN harness
  • Insufficient control module ground
  • Defective fuel injector/s
  • Defective controller or programming error
  • Open or shorted circuits between the fuel injector and the PCM

What are some P062B troubleshooting steps?

Even to the most experienced and well-equipped professional technician, diagnosing a code P062B can prove to be quite a challenge. There is also the issue of reprogramming. Without the necessary reprogramming equipment, it will be impossible to replace a defective controller and complete a successful repair.

If there are ECM/PCM power supply codes present, they will obviously need to be rectified before attempting to diagnose a P062B. Also, if there are individual fuel injector codes or fuel injector circuit codes present, these must be diagnosed and repaired first.

There are several preliminary tests that can be performed prior to declaring an individual controller defective. A diagnostic scanner, a digital volt/ohmmeter (DVOM), and a source of reliable vehicle information will be required. A fuel injector noid light will also prove helpful when testing fuel injector circuits.

Connect the scanner to the vehicle diagnostic port and retrieve all stored codes and freeze frame data. You will want to write this information down, just in case the code proves to be an intermittent one. After recording all pertinent information, clear the codes and test drive the vehicle until the code is reset or the PCM enters readiness mode. If the PCM enters readiness mode, the code is intermittent and will be more difficult to diagnose. The condition, which caused the P062B to be stored, may even need to worsen before a diagnosis can be made. If the code is reset, continue with this short list of preliminary tests.

(Video) Fuel Injector Control Module Repair

When attempting to diagnose a P062B, information may be your greatest tool. Search you vehicle information source for technical service bulletins (TSB) that parallel the code stored, vehicle (year, make, model, and engine), and symptoms exhibited. If you find the right TSB, it may yield diagnostic information that will aid you in a major way.

Use your source of vehicle information to obtain connector face views, connector pin-out charts, component locators, wiring diagrams, and diagnostic flow charts related to the code and vehicle in question.

Use the noid lamp to test the individual fuel injector circuits and make repairs as necessary. Use the DVOM to test fuel injectors following manufacturer’s specifications and procedures. If all fuel injectors and fuel injector circuits appear to be functioning as intended, proceed by testing the controller power supply and ground.

Use the DVOM to test controller power supply fuses and relays. Test and replace blown fuses as required. Fuses should be tested with the circuit loaded.

If all fuses and relays appear to be functioning as intended, a visual inspection of controller related wiring and harnesses is in order. You will also want to check chassis and engine ground junctions. Use your vehicle information source to obtain ground locations for related circuits. Use the DVOM to test ground integrity.

Visually inspect system controllers for signs of water, heat, or collision damage. Any controller that is damaged, especially by water, should be considered defective.

(Video) Fuel Injection Control Module

If controller power and ground circuits are intact, suspect a defective controller or a controller programming error. Controller replacement will require reprogramming. In some cases, you may purchase reprogrammed controllers through aftermarket sources. Other vehicles/controllers will require on-board reprogramming that may only be done through a dealership or other qualified source.

  • Unlike most other codes, the P062B is likely caused by a defective controller or a controller programming error
  • Test system ground integrity by connecting the negative test lead of the DVOM to ground and the positive test lead to battery voltage

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  • sorry guys, I'm no professional at this.I've got a 2014 Chevrolet Impala LT.Here's my problem, my check engine light came on and car was making weird sound at about 1000 to 2000 rpm's.So I take it to Auto Zone and they do a diagnostic's test and the codes come back as p0011 & p0014. Well, unf...

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What does a fuel injection control module do? ›

A 6.0 FICM or fuel injection control module is what provides power and control to the fuel injectors. The FICM is mounted on supporting brackets above the valve cover on the driver's side of the engine and was used on the 6.0 Power Stroke engines.

Where is the injector control module? ›

Fuel Injector Control Modules (FICM), located on the engine valve cover are subject to intense heat and vibration.

What does error code P062F mean? ›

What Does the P062F Code Mean? Diagnostic trouble code (DTC) P062F stands for “Internal Control Module EEPROM Error.” Your vehicle is equipped with a variety of computers, referred to as control modules. Each module has temporary memory and permanent memory.

What does code P061B mean? ›

P061B is a generic diagnostic trouble code (DTC) that stands for “Internal Control Module Torque Calculation Performance.” It indicates that the powertrain control module (PCM) made a torque calculation error, either due to an internal failure or unexpected sensor data.

How do you adjust the fuel air mixture on a fuel injection? ›

How to Adjust Air & Fuel Mixture on a Vehicle's Carburetor - YouTube

What controls the fuel injector pulse? ›

A fuel injector firing

The amount of fuel supplied to the engine is determined by the amount of time the fuel injector stays open. This is called the pulse width, and it is controlled by the ECU.

How do I know if my Ficm is going bad? ›

What a Failing FICM Looks and Sounds Like. When you aren't getting 48-volts to the injector coils you get: hard starts, rough idle, loss of power, poor drivability, and excessive smoke out the tailpipe—and in cold weather each of those symptoms will be amplified.

What is a injector circuit? ›

The fuel injector circuit controls the fuel injectors and commands how much fuel and when to spray the fuel. This code is set when the ECM detects out-of-range sensor performance for either the voltage or resistance of the injector circuit.

How do you test a Ficm? ›

FICM Test - YouTube

How do I fix code P0611? ›

How To Correct P0611 Fuel Injector Control Module Performance
  1. Replacement of CAN bus harness.
  2. Replacement of Fuel Injection Control Module.
  3. Fuel Injector Replacement.
  4. PCM repair or reprogramming.
2 Jun 2022

How do I clear P0603 code? ›

Possible Solutions For Fixing the P0603 Code
  1. – Try Replacing your battery or alternator.
  2. – Replacing failed PCM or battery grounds.
  3. – Consider Replacing your PCM.

What causes a P0601 code? ›

Diagnostic trouble code (DTC) P0601 stands for “Internal Control Module Memory Checksum Error.” It is triggered when the powertrain control module (PCM) detects an internal problem, typically a failed Memory checksum test. The PCM's memory checksum test is performed regularly.

What is IDU Eeprom error? ›

An E0 error code indicates that one of the boards, indoor or outdoor, have failed and will have to be replaced.

How do I fix my P0601 code? ›

Fixing your P0601 engine code will likely require you to repair or replace the PCM in your car. The PCM repair process varies depending on the make and model of your car. Replacing your PCM will require programming, which you can't do without the necessary equipment.

How does a fuel controller work? ›

Air / fuel ratio (AFR) is controlled by the Engine Control Unit (ECU). Bazzaz fuel controllers piggy back onto the ECU, intercepting the signals sent to the fuel injectors and modifying them. The precise data for these changes is stored in the fuel controller in the form of a fuel map.

How does Harley fuel injection work? ›

With an electronic fuel injection system, the required fuel amount for each RPM and engine load condition is located in the fuel map located in the ECU. Once this primary fuel amount is known, then the ECU further adjusts the fuel mixture for the engine and air intake temperatures.

What does fuel injected mean on a dirt bike? ›

Fuel injection is an engine technology. The engine supplies fuel directly to the cylinder in the manifold. The entire fuel injector system is controlled by an Electronic Control Unit. It is this unit that monitors engine temperature and oxygen levels. It also monitors the air intake and many other vital elements.


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