C1274 – OBD-II DTC

OBD-II DTC C1274 – Solenoid Relay # 1 Circuit Failure

DTC C1274 meaning

DTC C1274 refers to a diagnostic trouble code indicating a failure in the Solenoid Relay # 1 circuit. This code is typically associated with the vehicle’s traction control or stability control systems. The solenoid relay is responsible for controlling various functions within the vehicle’s transmission or braking systems, and a failure in this circuit can lead to impaired vehicle performance.

DTC C1274 symptoms

Common symptoms associated with DTC C1274 may include:

• Illumination of the check engine light or traction control warning light
• Reduced engine power or performance
• Inconsistent or erratic shifting in automatic transmissions
• Loss of traction control or stability control functionality
• Unusual noises from the transmission or braking system

DTC C1274 causes

Several factors can contribute to the occurrence of DTC C1274, including:

• Faulty solenoid relay # 1
• Wiring issues, such as shorts or open circuits in the relay circuit
• Corroded or loose electrical connections
• Faulty engine control module (ECM) or transmission control module (TCM)
• Issues with the vehicle’s power supply or battery

DTC C1274 seriousness

DTC C1274 is considered a moderate to serious issue. While the vehicle may still be operable, the failure of the solenoid relay can lead to compromised vehicle safety and performance. It is important to address this code promptly to avoid further damage to the vehicle’s systems and to ensure safe driving conditions.

How to diagnose DTC C1274

To diagnose DTC C1274, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1274 code.
2. Inspect the vehicle’s wiring and connectors related to the solenoid relay # 1 for any visible damage or corrosion.
3. Test the solenoid relay # 1 for proper operation using a multimeter.
4. Check for any additional trouble codes that may provide further insight into the issue.
5. Examine the vehicle’s power supply and battery condition.

How to fix DTC C1274 step-by-step instructions

To fix DTC C1274, follow these steps:

1. Repair or replace any damaged wiring or connectors found during the diagnosis.
2. If the solenoid relay # 1 is faulty, replace it with a new one.
3. Ensure all electrical connections are clean and secure.
4. Check the vehicle’s battery and charging system to ensure proper voltage.
5. Clear the DTC using an OBD-II scanner and test drive the vehicle to see if the code returns.

How to erase DTC C1274

To erase DTC C1274, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the vehicle’s ignition without starting the engine.
3. Navigate to the “Erase Codes” or “Clear DTCs” option on the scanner.
4. Confirm the action to clear the trouble codes.
5. Disconnect the scanner and start the vehicle to ensure the code does not reappear.

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