C1902 – OBD-II DTC

OBD-II DTC C1902 – Ride Control RR Shock Actuator Circuit Open

DTC C1902 meaning

DTC C1902 refers to a diagnostic trouble code indicating an open circuit in the rear right shock actuator circuit of the ride control system. This code is part of the On-Board Diagnostics II (OBD-II) system, which monitors various vehicle components to ensure proper functionality. The rear right shock actuator is responsible for adjusting the suspension system to enhance ride quality and handling. An open circuit means that there is a break in the electrical connection, preventing the actuator from receiving the necessary signals to operate correctly.

DTC C1902 symptoms

Common symptoms associated with DTC C1902 may include:

• Warning lights on the dashboard, such as the check engine light or ride control warning light.
• Decreased ride quality, leading to a rough or bumpy driving experience.
• Inconsistent handling or stability issues while driving.
• Possible noise from the suspension system when driving over bumps.

DTC C1902 causes

Several factors can lead to the occurrence of DTC C1902, including:

• Damaged or frayed wiring in the rear right shock actuator circuit.
• Corroded or loose electrical connectors affecting the circuit.
• Faulty rear right shock actuator itself.
• Issues with the vehicle’s body control module (BCM) or suspension control module.

DTC C1902 seriousness

DTC C1902 is considered a moderate to serious issue. While the vehicle may still be operable, the compromised ride control system can lead to safety concerns, particularly in handling and stability. Ignoring this code may result in further damage to the suspension system or other related components, potentially leading to more costly repairs.

How to diagnose DTC C1902

To diagnose DTC C1902, follow these steps:

1. Use an OBD-II scanner to confirm the presence of the C1902 code.
2. Inspect the wiring and connectors associated with the rear right shock actuator for any visible damage or corrosion.
3. Perform a continuity test on the circuit to check for any breaks or opens.
4. Test the rear right shock actuator for proper operation using a multimeter.
5. Check the vehicle’s body control module (BCM) and suspension control module for any fault codes or issues.

How to fix DTC C1902 step-by-step instructions

To fix DTC C1902, follow these steps:

1. Repair or replace any damaged wiring or connectors found during the diagnosis.
2. If the rear right shock actuator is faulty, replace it with a new or refurbished unit.
3. Clear any fault codes from the vehicle’s computer using an OBD-II scanner.
4. Test drive the vehicle to ensure that the ride control system is functioning correctly and that the DTC does not reappear.

How to erase DTC C1902

To erase DTC C1902, 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 return.

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