C1279 – OBD-II DTC

OBD-II DTC C1279 – Yaw Rate Sensor circuit Failure

DTC C1279 meaning

DTC C1279 refers to a fault in the Yaw Rate Sensor circuit. The yaw rate sensor is a critical component in a vehicle’s stability control system, measuring the vehicle’s rotation around its vertical axis. When the onboard diagnostic system detects a malfunction in this sensor or its circuit, it triggers the C1279 code, indicating a failure that may affect vehicle handling and stability.

DTC C1279 symptoms

Common symptoms associated with DTC C1279 may include:

• Illumination of the check engine light or stability control warning light.
• Unusual vehicle handling, such as oversteering or understeering.
• Inconsistent traction control or stability control performance.
• Potential activation of the anti-lock braking system (ABS) warning light.

DTC C1279 causes

Several factors can lead to the triggering of DTC C1279, including:

• Faulty yaw rate sensor.
• Wiring issues, such as damaged or corroded connectors.
• Short circuits or open circuits in the sensor circuit.
• Faulty electronic control unit (ECU) or software issues.
• Improper installation or calibration of the yaw rate sensor.

DTC C1279 seriousness

DTC C1279 is considered a serious issue as it directly impacts the vehicle’s stability control systems. If left unaddressed, it can lead to:

• Increased risk of loss of control during adverse driving conditions.
• Potential for accidents due to compromised vehicle handling.
• Failure of safety systems like traction control and ABS.

How to diagnose DTC C1279

To diagnose DTC C1279, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1279 code.
2. Inspect the yaw rate sensor and its wiring for visible damage or corrosion.
3. Check the sensor’s electrical connections for proper fit and continuity.
4. Test the yaw rate sensor using a multimeter to ensure it operates within specifications.
5. Examine the vehicle’s ECU for any software updates or faults.
6. Clear the code and perform a test drive to see if the code reappears.

How to fix DTC C1279 step-by-step instructions

To fix DTC C1279, follow these steps:

1. Disconnect the vehicle’s battery to ensure safety while working on the electrical system.
2. Inspect and repair any damaged wiring or connectors related to the yaw rate sensor.
3. If the yaw rate sensor is faulty, replace it with a new one.
4. Reconnect the battery and clear the DTC using an OBD-II scanner.
5. Perform a test drive to verify that the issue is resolved and the code does not return.

How to erase DTC C1279

To erase DTC C1279, follow these steps:

1. Connect an OBD-II scanner to the vehicle’s diagnostic port.
2. Turn on the ignition without starting the engine.
3. Navigate to the diagnostic 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 perform a test drive to ensure the code does not reappear.

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