P268F OBD Error Code: Problem & Solutions

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See the error code P268F flashing? Don’t know what to do? Here’ how you can crack the error code P268F. This OBD-II code decreased engine performance is also known as a cylinder 4 injector data incompatible. It is notable that the fuel injectors installed have calibration numbers printed on them. It is essential to enter this number into the engine computer (PCM) and the glow plug control module (GPCM) whenever the injector is replaced. The code P268F is set whenever the calibration ID is not recorded in both these modules (PCM and GPCM).

One can observe that all the injectors have a code stored in the electrically erasable programmable read-only memory (EEPROM) separately. This supplies information to the electronic control unit (ECU) concerning about the variations of that injector from a theoretical average injector. The code is stored when the injector code is missing or invalid by the powertrain control module.

What causes this problem with the Cylinder 4 Injector Data Incompatible?

• Wrong reprogramming of the PCM or the fuel control module (when a replacement of the PCM or controller has been performed)
• Damaged fuel injectors
• Corroded or defective connectors or wiring to the fuel injectors, interfacing control modules and the PCM input circuitry
• Short circuited or loose ground wires to the PCM or other control modules
• Malfunction in the PCM
• Faulty program injector

Fuel Injectors - Love travelling but hate these halts? Don’t know what’s the reason behind it? Well, it could be due to an error in the fuel injectors. In addition to the code being stored, you are likely to notice poor idle too. Log into Parts Avatar now!

Powertrain Control Module - A big number of erratic symptoms are likely to accompany along a damaged PCM. The unit enables the system and transmission to work in tandem. So a defective PCM can affect not only a few parts but the functioning of the entire system. Tune into Parts Avatar for top notch sets of PCM.

Glow Plug Control Module - Due to a defective glow plug control module, the first thing you may notice is lack of power while accelerating and a deterioration in the overall performance of the engine. Tune into Parts Avatar if you wish to restore or repair your glow plug control module.

Engine Control Module - Suddenly observing unexplainable jerks or bucking in the vehicle? Sudden idle surges? Well, all that is likely to be triggered due to a malfunctioning engine control module. Repair or replace yours now from Parts Avatar. We are just a click away!

Our main motive is to achieve customer satisfaction and that’s why we will help you to diagnose P268F code by mentioning some major symptoms below:

Common Symptoms

• Fall in the engine performance
• At times, engine may not start at all

Have a look at some ways with which you can correct the P268F code:

• Repair or replace all the defective fuel injectors
• Make sure you repair or replace all the corroded wiring or connectors associated to the fuel injectors, interfacing control modules and the PCM input circuitry
• A malfunctioning powertrain control module should be repaired or replaced
• Change or repair a defective glow plug control module

There is no need to get strained if your OBD code is still flashing up as we are here at your service. Have a look at our superior variety of fuel injectors, PCM, glow plug control modules, fuel injectors, injectors connectors, injector wiring, connectors, cinder block, piezoelectric, engine block, cylinder head and many more. Now all your problems would vanish within no time.

Here are some steps which you should follow in order to diagnose this fault code:

• This type of code is found only in applications with diesel engines.
• Many recent model diesel fuel injectors are separately numbered for electronic identification.
• For that specific injector to be recognized by the controller, this alpha numeric identification must be programmed into the PCM (or auxiliary controller).
• Many scanners will allow the technician to revive these alpha numeric numbers (or codes) before controller replacement.
• If the numbers are revived properly, they can be entered into the new controller again upon replacement and no codes will be presented.
• If the numbers are not entered correctly, it will be result into this type of code.
• To obtain the individual alpha numeric codes, you may do so by removing the appropriate valve cover and physically recovering it.
• Presentation of this type of code is generally indicative of a malfunction that has occurred in the reprogramming process or the CAN.
• CAN is the abbreviated for “controller area network.” The CAN is a representative of a communication bus that permits multiple micro controllers to communicate with each other without the requirement of a host computer.
• It is a message-based protocol specifically designed for automotive use.
• The CAN bus network is a complicated accumulation of wiring harnesses and connectors used as a channel of information shared between two or more automotive modules.
• Virtually all electrical functions of the vehicle are controlled by these controllers, with the PCM being the main controller.
• Input data from various sensors is received by the control modules. Control modules als emit output signals to system components and other control modules.
• For example: input signals from the vehicle speed sensor is received by the PCM.
• This signal is methodically forwarded to affected control modules that use the data to achieve various other tasks.
• The data is used by the cruise control module for speed control tasks. In order to regulate the vehicle traction control strategy, the traction control system uses the data and the anti-lock brake controller analyses vehicle speed from the PCM with data inputs from individual wheel speed sensors to use the anti-lock braking system. The CAN bus is relevant because other control modules are likely to detect the defect as well, while the internal control module failures are identified by the particular module.
• Failure of individual control modules is a rare but possible phenomenon.
• Comply with the manufacturer’s recommended testing method for the diagnosis of the individual control modules and replace them as necessary.
• Replacement of nearly all of these control modules will need reprogramming.
• Several tools are instrumental for a successful diagnosis of the causes which lead to the storing of this code.
• A suitable OBD-II scanner (or code reader) and a digital volt/ohmmeter will be essential to perform a diagnosis successfully.
• It will also be essential to gain access to access a manufacturer’s wiring schematic for a successful diagnosis of this code. It is also necessary to perform a thorough visual inspection of all PCM wiring and connectors.
• Fix or replace defected, disconnected, shorted or burnt wiring, connectors, and components as required.
• It is important to retest the system after the repairs have been made to ensure success. If all wiring, connectors and components (including fuses) seem to be in normal working condition, connect the scanner (or code reader) to the diagnostic connector for registering all stored codes and freeze frame data.
• This information can be extremely useful in the diagnosis of intermittent conditions that may have caused this code to being stored.
• Proceed by clearing the code and operating the vehicle to check if it returns.
• This will help to check whether the malfunction is intermittent or not. Once the codes have been cleared, test drive the vehicle to check if the code returns.
• Failure of the code to immediately return indicates that you may have an intermittent condition.
• Diagnosis of intermittent conditions might prove to be very difficult and in extreme cases may have to be allowed to become worse before an accurate diagnosis can be made.
• This code involves a bulk of circuitry due to which it should best be left to a professional.
• The general area of malfunction can be determined much more easily and efficiently by an experienced technician with a specialized scanner (Autohex or Tech II) than by someone using a code reader and a digital volt ohmmeter.
• Disconnecting and testing every single pin of the CAN bus separately could turn out to be extremely time consuming and cost ineffective.
• In addition to this, some kind of memory saving device should be installed in case the PCM and other controllers lose their memory and need reprogramming.
• A specialized diagnostic CAN scanner will show pin values and control module values without the risk of a meltdown.
• It can diagnose computer and circuitry issues accurately by monitoring vehicle operation while the vehicle is being operated.
• For the diagnosis of this type of code using a digital volt ohmmeter, the testing of thousands of circuits separately would be involved.
• Even one misplaced test would could lead to consequential defects in the expensive control modules and require the vehicle to be completely reprogrammed. You may attempt to perform a continuity test once all the control modules have been disconnected, and this could take up 40 hours or more depending on the vehicle.
• There are up to 18 separate control modules installed in some applications. If you decide to carry out this monumental task, the first step should be a thorough visual inspection of all system circuitry, connectors, and fuses.
• Probe the control module ground circuits for continuity with battery ground.
• Defective or disconnected system grounds are the frequent cause behind this type of code being stored.
• An auxiliary ground cable can be useful for diagnosing system ground abnormalities
• Sometimes once the necessary repairs have been carried out, the engine and transmission ground cables, straps, and wires are left dangling.
• Check for any loose or burnt electrical connectors that may increase circuit resistance and contribute this code to get stored. Acquire a CAN bus system wiring diagram and/or pin out value chart, and then test continuity between individual controller connectors using a digital volt ohmmeter.
• Compare your analysis with the manufacturer’s referenced values and fix open or shorted circuits as needed.
• It is generally much more economical to replace damaged wiring rather than trying to remove it from the complicated web of wiring harnesses. 

Common Mistakes When Diagnosing the P268F Code

Here we have listed a few common mistakes that should be avoided while performing the diagnosis:

• When the fuel injectors are not programmed according to the powertrain control module and the glow plug control module, this may stimulate the error code P268F.