U1255 – OBD-II DTC

OBD-II DTC U1255 – SCP (J1850) Invalid or Missing Data for Network Control

DTC U1255 meaning

DTC U1255 refers to a diagnostic trouble code indicating “Invalid or Missing Data for Network Control” within the SCP (Single Wire CAN Protocol) network. This code is triggered when the vehicle’s onboard diagnostic system detects that a module is not receiving valid data from another module on the network, which can lead to communication issues between various components of the vehicle.

DTC U1255 symptoms

Common symptoms associated with DTC U1255 may include:

• Illumination of the check engine light
• Malfunctioning of certain vehicle systems
• Loss of communication with specific modules
• Erratic behavior of electrical components
• Decreased fuel efficiency

DTC U1255 causes

Several factors can lead to the triggering of DTC U1255, including:

• Faulty or damaged wiring in the SCP network
• Defective control modules
• Corrosion or poor connections at the connectors
• Software issues within the control modules
• Interference from aftermarket devices

DTC U1255 seriousness

DTC U1255 can be considered a moderate to serious issue, as it indicates a communication failure between critical vehicle systems. If left unaddressed, it may lead to further complications, including system malfunctions, reduced vehicle performance, and potential safety hazards.

How to diagnose DTC U1255

To diagnose DTC U1255, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the U1255 code.
2. Check for any additional trouble codes that may provide more context.
3. Inspect the wiring and connectors associated with the SCP network for damage or corrosion.
4. Test the affected control modules for proper operation.
5. Verify the integrity of the network by checking for voltage and ground signals.

How to fix DTC U1255 step-by-step instructions

To fix DTC U1255, follow these steps:

1. Repair or replace any damaged wiring or connectors in the SCP network.
2. Replace any faulty control modules identified during diagnosis.
3. Clean any corroded connections to ensure proper communication.
4. Update the software in the control modules if necessary.
5. Clear the DTC using an OBD-II scanner and test drive the vehicle to ensure the issue is resolved.

How to erase DTC U1255

To erase DTC U1255, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Access the trouble codes menu on the scanner.
3. 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 perform a test drive to ensure the code does not reappear.

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