C1289 – OBD-II DTC

OBD-II DTC C1289 – Pressure Transducer Redundant / Secondary Input Circuit Failure

DTC C1289 meaning

DTC C1289 refers to a diagnostic trouble code indicating a failure in the pressure transducer redundant or secondary input circuit. This code is typically associated with the vehicle’s stability control system, which relies on accurate pressure readings from the transducer to function properly. When the system detects an issue with the redundant input, it triggers this code to alert the technician of a potential malfunction.

DTC C1289 symptoms

Common symptoms associated with DTC C1289 may include:

• Illumination of the check engine light or stability control warning light
• Decreased stability control performance
• Unusual braking behavior or reduced braking efficiency
• Inconsistent pressure readings on the vehicle’s diagnostic tools

DTC C1289 causes

Several factors can lead to the triggering of DTC C1289, including:

• Faulty pressure transducer
• Wiring issues, such as shorts or open circuits in the redundant input circuit
• Corrosion or poor connections in the electrical connectors
• Malfunctioning electronic control unit (ECU)
• Software issues within the vehicle’s control systems

DTC C1289 seriousness

DTC C1289 is considered a moderate to serious issue. While it may not immediately affect the vehicle’s drivability, it can compromise the effectiveness of the stability control system, which is crucial for maintaining vehicle control during adverse conditions. Ignoring this code can lead to safety risks, especially in situations requiring enhanced braking and stability.

How to diagnose DTC C1289

To diagnose DTC C1289, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1289 code.
2. Inspect the vehicle’s wiring and connectors related to the pressure transducer for any visible damage or corrosion.
3. Test the pressure transducer using a multimeter to ensure it is functioning within specifications.
4. Check for any additional trouble codes that may provide further insight into the issue.
5. Review the vehicle’s service history for any previous repairs related to the stability control system.

How to fix DTC C1289 step-by-step instructions

To fix DTC C1289, follow these steps:

1. Clear the DTC using an OBD-II scanner.
2. Inspect and repair any damaged wiring or connectors associated with the pressure transducer.
3. If the pressure transducer is faulty, replace it with a new one.
4. Recheck the connections to ensure they are secure and free of corrosion.
5. Reconnect the battery if it was disconnected during repairs.
6. Start the vehicle and monitor for any reoccurrence of the DTC.

How to erase DTC C1289

To erase DTC C1289, 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 “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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