Guide To P268C OBD Error Code Solutions

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Don’t nowhere to start form? Well, we have got you covered! Here’s all you need to know about the error code P268C. The OBD-II code decreased engine performance is often described as a cylinder 1 injector data incompatible. Often, one can find the calibration numbers printed on the side of the fuel injectors. This number should be entered into the engine computer (PCM) and glow plug control module (GPCM), whenever the injector is replaced. The code P268C is set when if the calibration ID is not registered to both modules.

Each and every injector has a code stored in the electrically erasable programmable read-only memory (EEPROM). This transfers the information to the electronic control unit (ECU) information regarding the deviations of the injector from a theoretical average injector. The OBD-II code P268C is stored by the powertrain control module whenever the injector code is missing or invalid.

What causes this problem with the Cylinder 1 Injector Data Incompatible?

• A failure in the reprogramming of the PCM or the fuel control module (right after replacements have been performed
• Damaged fuel injectors
• Corroded or loose injector connectors or injector wiring
• Burnt circuitry or connectors between interfacing control modules or powertrain control module (from the engine sensors)
• Loose or weary ground wires to the PCM or other control modules
• Internal issue in the PCM
• Concerns related to program injector

1. Fuel Injectors - Rough idle and loss in engine output are some of the problems that accompany a damaged fuel injector. Now get rid of all these problems immediately by changing or repairing your damaged fuel injectors.
2. Powertrain Control Module - See the error code P268C popping again and again? A faulty powertrain control module is likely to invite issues like a poorly running engine, increase in carbon emission, choking, stuttering and stalling of the engine. Well, to avoid these, we recommend a replacement or repair of the powertrain control module before it worsens the condition of the system.
3. Glow Plug Control Module - See an illuminated glow plug light? Then you should immediately change or repair your glow plug control module to avoid further problems hampering the functionality of the vehicle. Tune into Parts Avatar now!
4. Fuel Injector Connectors - Is your engine not reaching its full RPM? If yes, then you need to mend or restore all the corroded or open fuel injector connectors right away. Don’t know where to look from? Visit Parts Avatar today!
5. Fuel Injector Wiring - Short circuited or disconnected fuel injector wirings? This can cause poor performance in the engine. We advise you to repair or replace it immediately.

It is essential to know the symptoms of an issue as only then you would be able to solve the problem. So that’s why we have listed out some major symptoms of OBD code P268C here:

Common Symptoms

• Reduced engine performance
• Difficulty in starting engine

Here are some ways with the help of which you will be able to correct the OBD code P268C:

• Repair or replace the fuel injectors
• Make sure you replace or repair a damaged powertrain control module or glow plug control module immediately
• All the corroded wiring or connectors to the fuel injectors should be mended or restored

There is no need to be anxious as Parts Avatar – Car Parts Online is here to help you out! We have high grade fuel injectors, PCM, glow plug control modules, fuel injectors, injectors connectors, injector wiring, connectors, ground wires to the PCM and a lot more for our precious customers.

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

• This kind of code can only be found in applications with diesel engines.
• Numerous latest model diesel fuel injectors are numbered individually for electronic identification.
• In order for that specific injector to be recognized by the controller, the alpha numeric identification number must be programmed into the PCM (or auxiliary controller).
• Many scanners will permit the technician to revive these alpha numeric numbers (or codes) before controller replacement.
• On being properly revived, the numbers can be entered into the new controller again upon replacement and no codes will be presented.
• This type of code will be the result of incorrectly entered numbers.
• To obtain alpha numeric codes, the appropriate valve cover should be removed and physically retrieved.
• Presentation of this kind of code is generally indicative of a malfunction that has taken place in the reprogramming process or the CAN.
• CAN is the acronym for “controller area network”. The CAN is the representative of a communication bus that allows numerous microcontrollers to communicate with one another without the the need for a host computer.
• It is a message-based protocol which had originally designed for automotive use.
• The CAN bus network is actually a complicated accumulation of wiring harnesses and connectors used as a channel of information shared between two or more automotive control modules.
• Virtually every electrical function of the vehicle is controlled by these controllers, with PCM being the primary controller.
• Input data from various sensors is received by the control modules. They emit output signals to system components and other control modules.
• For example: the PCM gets an input signal from the vehicle speed sensor.
• This signal is then forwarded methodically to affected control modules which use the data to accomplish various different tasks.
• It should be noted that the cruise control module utilizes the data for speed control tasks, the traction control system utilizes the data to monitor vehicle traction control strategy, and the anti-lock brake controller compares vehicle speed from the PCM with data inputs from individual wheel speed sensors to run the anti-lock braking system. Failures in the Internal control module are generally identified by the module but the CAN bus is also relevant because other control modules are likely to notify the malfunction.
• Although cases of failure of individual control module are less, they are possible.
• Conform to the manufacturer’s recommended testing method for diagnosing the individual control modules and change them as and when required.
• Reprogramming will be required for the replacement of virtually all of these control modules.
• Several tools will be necessary for the successful diagnosis of the conditions which have led to the storing of this code.
• For attempting to successfully diagnose this code a suitable OBD-II scanner (or code reader) and a digital volt/ohmmeter will be instrumental.
• Getting access to a manufacturer’s wiring schematic will also prove to be instrumental in successfully diagnosing this code. A thorough visual inspection of all PCM wiring and connectors will be required.
• Replace or fix the defective, disconnected, burnt, or corroded wiring, connectors, and components as required.
• It is always advisable to retest the system after the repairs have been completed to guarantee success. If all system wiring, connectors, and components (including fuses) seem to be in normal working state, connect the scanner (or code reader) to the diagnostic scanner and record all stored codes and freeze frame data.
• This information may prove to be extremely useful in case of diagnosis of intermittent conditions that may have caused this code to get stored.
• Proceed further by clearing the code and operating the vehicle to check if it returns.
• This will help to ascertain if the malfunction is intermittent. Once the codes have been cleared, the vehicle should be test driven to check if the code returns.
• Failure of the code to return immediately indicates an intermittent condition.
• Diagnosis of intermittent conditions can prove to be quite difficult and in extreme cases may have to be allowed to become worse before an accurate diagnosis can be attempted.
• Since this code involves bulk of circuitry, it is better to leave this kind of diagnostic code to a professional.
• The general area of the malfunction can be determined much more rapidly and easily by an experienced technician with a specialized scanner (Autohex or Tech II) than someone who is using a code reader and a digital volt ohmmeter.
• Disconnecting and testing every single pin of the CAN bus individually may prove to be extremely time consuming and cost prohibitive.
• Installing some type of memory saving device may prove helpful in case the PCM and other controllers lose their memory and require reprogramming.
• A specialized diagnostic CAN scanner will show pin values and control module operations without the risk of any meltdown.
• An accurate diagnosis of computer and circuitry problems can be made by monitoring operation while the operation is being operation.
• Using a digital volt ohmmeter would require testing of thousands of circuits separately to diagnose this code.
• Even one inaccurate test could lead to defects in expensive control modules and require that the vehicle should be totally reprogrammed. The most you can do is attempting to perform a continuity test after all control modules are disconnected. This test could require 40 hours or more, depending on the kind of vehicle.
• There are some applications which have up to 18 separate control modules installed in them. If you decide on performing this monumental task, your first step should be a thorough visual inspection of all system circuitry, connectors and fuses.
• Continuity of control module circuits should be tested with battery ground.
• These types of codes are frequently a result of damaged or disconnected system grounds.
• System ground discrepancies can be diagnosed by using an auxiliary ground cable.
• In a lot of cases the engine and transmission ground cables, straps, and wires are left dangling after the repairs have been performed.
• Check for loose or corroded electrical connectors that may lead to an increase in circuit resistance and contribute these types of codes to be stored. Acquire a CAN bus system wiring diagram and/or pin out value chart and proceed by using the digital volt ohmmeter to probe the continuity between individual controller connectors.
• Compare your analysis with the manufacturer’s referenced values and fix open or shorted circuits as necessary.
• Mostly, it is much more economical to replace damaged wirings rather than trying to remove it from a complex web of wiring harnesses.

Common Mistakes When Diagnosing the P268C Code

• Here we have listed a few common mistakes that should be avoided:
• Failed attempt at not programming the fuel injectors according to the powertrain control module (PCM) and the glow plug control module