P1264 – OBD-II DTC

OBD-II DTC P1264 – Immobilizer to PCM Signal Error

DTC P1264 meaning

DTC P1264 refers to an “Immobilizer to PCM Signal Error.” This code indicates that there is a communication issue between the vehicle’s immobilizer system and the Powertrain Control Module (PCM). The immobilizer system is designed to prevent unauthorized starting of the vehicle, and any disruption in its signal can lead to starting problems.

DTC P1264 symptoms

Common symptoms associated with DTC P1264 may include:

• Engine not starting
• Intermittent starting issues
• Dashboard warning lights illuminated
• Security system activation without reason

DTC P1264 causes

Several factors can lead to the occurrence of DTC P1264, including:

• Faulty immobilizer system
• Defective PCM
• Wiring issues or damaged connectors
• Weak or dead battery
• Incorrect key or key programming issues

DTC P1264 seriousness

DTC P1264 is considered a serious issue as it can prevent the vehicle from starting. This can lead to inconvenience and potential safety concerns if the vehicle becomes inoperable. It is essential to address this code promptly to ensure reliable vehicle operation.

How to diagnose DTC P1264

To diagnose DTC P1264, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the DTC.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the vehicle’s battery and connections for any issues.
4. Examine the wiring and connectors between the immobilizer and PCM for damage.
5. Test the immobilizer system and key for proper functionality.
6. Verify that the PCM is functioning correctly.

How to fix DTC P1264 step-by-step instructions

To fix DTC P1264, follow these steps:

1. Check and replace the vehicle’s battery if it is weak or dead.
2. Inspect and repair any damaged wiring or connectors between the immobilizer and PCM.
3. Test the immobilizer system and replace it if faulty.
4. Ensure that the key is programmed correctly and is the correct key for the vehicle.
5. If necessary, reprogram the PCM to ensure proper communication with the immobilizer.
6. Clear the DTC using an OBD-II scanner and test drive the vehicle to confirm the issue is resolved.

How to erase DTC P1264

To erase DTC P1264, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn the ignition key to the “On” position without starting the engine.
3. Access the scanner’s menu and select the option to clear or erase trouble codes.
4. Confirm the action and wait for the scanner to complete the process.
5. Disconnect the scanner and start the vehicle to check if the code reappears.

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